15,014 results match your criteria Nanoscale[Journal]


Tuning bimetallic catalysts for a selective growth of SWCNTs.

Nanoscale 2019 Feb 20. Epub 2019 Feb 20.

Laboratoire de Physique des Interfaces et des Couches Minces, CNRS, Ecole Polytechnique, 91128, Palaiseau Cedex, France.

Recent advances in structural control during the synthesis of SWCNTs have in common the use of bimetallic nanoparticles as catalysts, despite the fact that their exact role is not fully understood. We therefore analyze the effect of the catalyst's chemical composition on the structure of the resulting SWCNTs by comparing three bimetallic catalysts (FeRu, CoRu and NiRu). A specific synthesis protocol is designed to impede the catalyst nanoparticle coalescence mechanisms and stabilize their diameter distributions throughout the growth. Read More

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http://dx.doi.org/10.1039/c8nr09589bDOI Listing
February 2019

Photocatalytic performance of few-layer graphitic CN: enhanced by interlayer coupling.

Nanoscale 2019 Feb 20. Epub 2019 Feb 20.

New Energy Technology Engineering Laboratory of Jiangsu Province & School of Science, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing 210023, China and Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China.

For atomically thin two-dimensional materials, van der Waals interlayer coupling is a crucial factor to tune or produce novel physicochemical properties. In terms of photocatalysis, however, researching into the interlayer coupling effect is still in its infancy, especially that involving excited state dynamics. Here, by performing many-body perturbation theory and ab initio nonadiabatic molecular dynamics, we find that metal-free few-layer graphitic C3N4 (g-C3N4) possesses a better photocatalytic hydrogen evolution performance due to interlayer coupling compared with ultrathin monolayer g-C3N4. Read More

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http://dx.doi.org/10.1039/c8nr10142fDOI Listing
February 2019

The luminescence properties of CsPbMBr perovskite nanocrystals transformed from CsPbBr mediated by various divalent bromide MBr salts.

Nanoscale 2019 Feb 20. Epub 2019 Feb 20.

Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education, Beijing 100044, China. and Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China.

A novel high concentration doping method based on the transformation from Cs4PbBr6 nanocrystals (NCs), which reacted with divalent metal bromide MBr2, to CsPbxM1-xBr3 NCs was developed. Two types of M2+ and Zn2+ which cannot emit light and Mn2+ and Eu2+ which can be used as the luminous centres, were chosen to trigger the transformation of Cs4PbBr6 NCs to CsPbxM1-xBr3 NCs. CsPbxZn1-xBr3 NCs maintained high photoluminescence quantum yields (PLQY) (>75%) and had good dispersion in hexane without obvious dissolution or agglomeration after two weeks. Read More

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http://dx.doi.org/10.1039/c8nr09845jDOI Listing
February 2019

V-shaped active plasmonic meta-polymers.

Nanoscale 2019 Feb 20. Epub 2019 Feb 20.

Department of Physics, Indian Institute of Science Education and Research Pune, Pune 411008, India.

We report the design and fabrication of V-shaped plasmonic meta-polymers on a glass substrate or silicon wafer using a surface functionalization approach. The efficacy of the assembly method is examined by analyzing the surface enhanced Raman scattering by an individual V-shaped antenna experimentally and using computational simulations to determine the polarization dependence of local electromagnetic field enhancement. Read More

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http://dx.doi.org/10.1039/c8nr10034aDOI Listing
February 2019

Nanoassemblies of ultrasmall clusters with remarkable activity in carbon dioxide conversion into C1 fuels.

Nanoscale 2019 Feb 20. Epub 2019 Feb 20.

Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. and Institute for Molecular Engineering, The University of Chicago, Chicago 60637, USA.

Cu nanoassemblies formed transiently during reaction from size-selected subnanometer Cu4 clusters supported on amorphous OH-terminated alumina convert CO2 into methanol and hydrocarbons under near-atmospheric pressure at rates considerably higher than those of individually standing Cu4 clusters. An in situ characterization reveals that the clusters self-assemble into 2D nanoassemblies at higher temperatures which then disintegrate upon cooling down to room temperature. DFT calculations postulate a formation mechanism of these nanoassemblies by hydrogen-bond bridges between the clusters and H2O molecules, which keep the building blocks together while preventing their coalescence. Read More

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http://dx.doi.org/10.1039/c8nr06664gDOI Listing
February 2019

All-dielectric metasurfaces for simultaneously realizing polarization rotation and wavefront shaping of visible light.

Nanoscale 2019 Feb 19. Epub 2019 Feb 19.

Laser Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia and College of Information Science and Technology, Jinan University, Guangzhou, Guangdong 510632, China.

All-dielectric metasurfaces have shown unprecedented abilities to control light polarization and phase, yet most previous relevant studies have been mainly limited to cross-polarized schemes. This paper presents dielectric metasurfaces that incorporate distinct half-waveplate-like hydrogenated amorphous silicon nanoposts and are shown to manipulate the wavefront of transmitted visible light exhibiting controllable linear polarization angles. An anomalous beam deflector is designed, and high performances including an absolute deflection efficiency of 82%, a polarization conversion efficiency of 96%, and an extinction ratio of 37 dB are first demonstrated in the cross-polarized scheme. Read More

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http://dx.doi.org/10.1039/c9nr00187eDOI Listing
February 2019

Tailoring the self-assembly of a tripeptide for the formation of antimicrobial surfaces.

Nanoscale 2019 Feb 19. Epub 2019 Feb 19.

Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904. Israel.

The accumulation of bacteria on surfaces is currently one of the greatest concerns for the management of proper healthcare systems, water and energy. Here, we describe the mechanism by which a single peptide forms two pH-dependent supramolecular particles that resist bacterial contamination. By using NMR and molecular dynamics (MD), we determined the structures of the peptide monomers and showed the forces directing the self-assembly of each structure under different conditions. Read More

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http://dx.doi.org/10.1039/c8nr10043hDOI Listing
February 2019

Aggregation control of Ru and Ir nanoparticles by tunable aryl alkyl imidazolium ionic liquids.

Nanoscale 2019 Feb 19. Epub 2019 Feb 19.

Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.

Metal-nanoparticles (M-NPs) were synthesized in a wet-chemical synthesis route in tunable aryl alkyl ionic liquids (TAAILs) based on the 1-aryl-3-alkyl-substituted imidazolium motif from Ru3(CO)12 and Ir4(CO)12 by microwave-heating induced thermal decomposition. The size and size dispersion of the NPs were determined by transmission electron microscopy (TEM) to an average diameter of 2.2(±0. Read More

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http://dx.doi.org/10.1039/c8nr10286dDOI Listing
February 2019

Morphological and crystallographic orientation of hematite spindles in an applied magnetic field.

Nanoscale 2019 Feb 19. Epub 2019 Feb 19.

Department für Chemie, Universität zu Köln, Luxemburger Strasse 116, D-50939 Köln, Germany.

The magnetic response of spindle-shaped hematite (α-Fe2O3) nanoparticles was investigated by simultaneous small-angle and wide-angle X-ray scattering (SAXS/WAXS) experiments. The field-dependent magnetic and nematic order parameters of the magnetic single-domain nanospindles in a static magnetic field are fully described by SAXS simulations of an oriented ellipsoid with the implemented Langevin function. The experimental scattering intensities of the spindle-like particles can be modeled simply by using the geometrical (length, radius, size distribution) and magnetic parameters (strength of magnetic field, magnetic moment) obtained from isotropic SAXS and macroscopic magnetization measurements, respectively. Read More

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http://dx.doi.org/10.1039/c8nr09583cDOI Listing
February 2019

Nanoscale dipole dynamics of protein membranes studied by broadband dielectric microscopy.

Nanoscale 2019 Feb 19. Epub 2019 Feb 19.

Keysight Laboratories, Keysight Technologies, Gruberstr. 40, 4020 Linz, Austria.

We investigate the nearfield dipole mobility of protein membranes in a wide frequency range from 3 kHz to 10 GHz. The results of our nanoscale dielectric images and spectra of bacteriorhodopsin (bR) reveal Debye relaxations with time constants of τ ∼ 2 ns and τ ∼ 100 ns being characteristic of the dipole moments of the bR retinal and α-helices, respectively. However, the dipole mobility and therefore the protein biophysical function depend critically on the amount of surface water surrounding the protein, and the characteristic mobility in the secondary structure is only observed for humidity levels <30%. Read More

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http://dx.doi.org/10.1039/c8nr05880fDOI Listing
February 2019

Enhancement of thermal energy transport across the graphene/h-BN heterostructure interface.

Nanoscale 2019 Feb 19. Epub 2019 Feb 19.

College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China.

Enhancing thermal energy transport is critical for the applications of 2-dimensional materials. Here, we explored the methods of enhancing the interfacial thermal energy transport across the graphene (GR)/hexagonal boron nitride (h-BN) heterostructure interface, and revealed the enhancement mechanisms of interfacial thermal energy transport by applying non-equilibrium molecular dynamics (NEMD) simulations. The computational results indicated that both doping and interface topography optimization could effectively improve the interfacial thermal conductance (ITC) of the GR/h-BN heterostructure. Read More

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http://dx.doi.org/10.1039/c8nr10468aDOI Listing
February 2019

An ultranarrow SPR linewidth in the UV region for plasmonic sensing.

Nanoscale 2019 Feb 18. Epub 2019 Feb 18.

Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen, Fujian 361005, P. R. China.

Conventional surface plasmon resonance (SPR) modes based on gold and silver nanostructures only operate in the visible and near-infrared (NIR) regions. Nowadays, with the rapid development of strong coupling between molecules and plasmonic nanostructures and surface enhanced spectroscopy, it is highly desired to modulate the SPR modes with a narrow linewidth toward the ultraviolet (UV) wavelength region through a low cost and reproducible fabrication method. Herein, laser interference lithography is utilized to manufacture stable Al plasmonic arrays with well-controlled and tunable geometries. Read More

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http://dx.doi.org/10.1039/c8nr09703hDOI Listing
February 2019

Monolayer tellurenyne assembled with helical telluryne: structure and transport properties.

Nanoscale 2019 Feb 18. Epub 2019 Feb 18.

Key Laboratory of Automobile Materials, Ministry of Education, Department of Materials Science and Engineering, Jilin University 130022, Changchun, China.

Two-dimensional (2D) crystals are candidate materials for electronics and spintronics, but their deficient carrier mobility, inappreciable spin-orbit coupling effect, and environmental instability have such limited applications. Herein, using density functional theory methods, we propose a novel 2D monolayer material, named tellurenyne, built with an atomic tellurium chain (named telluryne) via a noncovalent bond. The comparable electrostatic and van der Waals contributions to interchain binding enable tellurenyne to exhibit remarkable stabilities and transport properties. Read More

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http://dx.doi.org/10.1039/c9nr00596jDOI Listing
February 2019

Visible light to switch-on desorption from goethite.

Nanoscale 2019 Feb 18. Epub 2019 Feb 18.

Institute of Physics, University of Tartu, Wilhelm Ostwald Str. 1, 50411 Tartu, Estonia. and Research Laboratory of Functional Materials Technologies, Riga Technical University, P. Valdena 3/7, 1048 Riga, Latvia.

Switching adsorption-desorption by visible light could provide the possibility for a wide range of applications that require controlled release-on-demand. Here, we demonstrate a visible-light controlled desorption behavior in aqueous suspensions for the first time. We observed cationic dye adsorption on amphoteric goethite α-FeOOH in the dark and release during visible light exposure at a pH value slightly over the isoelectric point of goethite. Read More

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http://dx.doi.org/10.1039/c8nr09547gDOI Listing
February 2019
2 Reads

Scalable synthesis of FeS nanoparticles encapsulated into N-doped carbon nanosheets as a high-performance sodium-ion battery anode.

Nanoscale 2019 Feb 18. Epub 2019 Feb 18.

School of Materials Science & Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA 30332-0245, USA.

Pyrite (FeS2) has been considered as one of the most potential anode materials for sodium ion batteries (SIBs) due to its low cost, environmentally friendly features and high theoretical capacity. However, the huge volume changes during a charge/discharge process and poor conductivity of FeS2 hindered its practical applications. Herein, we propose a facile scalable approach to prepare nanostructured FeS2 embedded in an N-doped carbon nanosheet composite (FeS2/CNS) via a combined template method and a solid state sulfuration method. Read More

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http://dx.doi.org/10.1039/c8nr10444aDOI Listing
February 2019

Controlling the 3-D morphology of Ni-Fe-based nanocatalysts for the oxygen evolution reaction.

Nanoscale 2019 Feb 18. Epub 2019 Feb 18.

Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA.

Controlling the 3-D morphology of nanocatalysts is one of the underexplored but important approaches for improving the sluggish kinetics of the oxygen evolution reaction (OER) in water electrolysis. This work reports a scalable, oil-based method based on thermal decomposition of organometallic complexes to yield highly uniform Ni-Fe-based nanocatalysts with a well-defined morphology (i.e. Read More

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http://dx.doi.org/10.1039/c8nr10138hDOI Listing
February 2019
1 Read

High performing AgNW transparent conducting electrodes with a sheet resistance of 2.5 Ω Sq based upon a roll-to-roll compatible post-processing technique.

Nanoscale 2019 Feb 18. Epub 2019 Feb 18.

School of Electronics, Bangor University, Dean St, Bangor, Gwynedd LL57 1UT, Wales, UK.

A report of transparent and conducting silver nanowires (AgNWs) that produce remarkable electrical performance, surface planarity and environmental stability is given. This research presents an innovative process that relies on three sequential steps, which are roll-to-roll (R2R) compatible: thermal embossing, infrared sintering and plasma treatment. This process leads to the demonstration of a conductive film with a sheet resistance of 2. Read More

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http://dx.doi.org/10.1039/c8nr07974aDOI Listing
February 2019

Prediction of MXene based 2D tunable band gap semiconductors: GW quasiparticle calculations.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

Department of Physics, University at Buffalo, State University of New York, Buffalo, New York 14260, USA and International Centre for Quantum and Molecular Structures and Department of Physics, Shanghai University, Shanghai 200444, China and Beijing Computational Science Research Center, Beijing 100084, China.

MXenes are a large family of layered transition metal carbide/nitride materials that possess a number of desired properties such as flexible chemical composition, high mechanical strength, and excellent structural stability. Although MXene based semiconductors have attracted considerable recent research attention in the search of novel 2D electronic materials, accurate understanding of their electronic properties has not been established. In this work, we carry out fully converged GW quasiparticle calculations for M2CO2 (M = Hf, Zr, and Ti) MXene based 2D semiconductors and alloys using newly developed accelerated GW methods. Read More

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http://dx.doi.org/10.1039/c9nr01160aDOI Listing
February 2019
1 Read

Maturation of adenovirus primes the protein nano-shell for successful endosomal escape.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

Moleculaire Biofysica, Zernike Instituut, Rijksuniversiteit Groningen, The Netherlands.

The ability of adenoviruses to infect a broad range of species has spurred a growing interest in nanomedicine to use adenovirus as a cargo delivery vehicle. While successful maturation of adenovirus and controlled disassembly are critical for efficient infection, the underlying mechanisms regulating these processes are not well understood. Here, we present Atomic Force Microscopy nanoindentation and fatigue studies of adenovirus capsids at different maturation stages to scrutinize their dynamic uncoating properties. Read More

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http://dx.doi.org/10.1039/c8nr10182eDOI Listing
February 2019

Enhancing charge transport in an organic photoactive layer via vertical component engineering for efficient perovskite/organic integrated solar cells.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China. and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

Suitable vertical component distribution within an organic bulk-heterojunction (BHJ) is vital for effective exciton dissociation and smooth charge transport in perovskite/organic integrated solar cells (ISCs). Herein, a bi-continuous interpenetrating network of organic donor/acceptor materials is constructed simply by optimizing their weight ratio, and is further applied in perovskite/organic ISCs. Time-of-flight secondary-ion mass spectroscopy (TOF-SIMS) and scanning Kelvin probe microscopy (SKPM) strongly confirm that this method can effectively restrict vertical stratification and build a desired bi-continuous framework within the organic photoactive layer, which can effectively suppress two potential recombination losses from the viewpoint of kinetics, leading to the PCE increasing from 12. Read More

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http://dx.doi.org/10.1039/c8nr09467eDOI Listing
February 2019

Penetration of nanoparticles across a lipid bilayer: effects of particle stiffness and surface hydrophobicity.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

Department of Engineering Mechanics and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310027, P. R. China.

The cellular uptake of nanoparticles (NPs) has drawn significant attention due to their great importance and potential in drug delivery, bioimaging, and specific targeting. Here, we conduct a computational study on the translocation process of soft nanoparticles with different elasticities and surface hydrophobicities through a lipid bilayer membrane. It is shown that the translocation abilities of hydrophilic NPs can be enhanced by increasing their stiffness, while the penetrability of hydrophobic NPs is weakened by increasing the particle stiffness. Read More

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http://dx.doi.org/10.1039/c8nr09381dDOI Listing
February 2019

Single pot synthesis of indirect band gap 2D CsPbBr nanosheets from direct band gap 3D CsPbBr nanocrystals and the origin of their luminescence properties.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore 560064, India. and School of Advanced Materials and International Centre of Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India.

Two-dimensional (2D) perovskites recently attracted significant interest due to their unique and novel optoelectronic properties. CsPb2Br5, a 2D inorganic perovskite halide, is an indirect band gap semiconductor, and hence it is not supposed to be luminescent. However, a fundamental understanding of the origin of its luminescence properties is still lacking as there are contradictory literature reports present concerning its luminescence properties. Read More

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http://dx.doi.org/10.1039/c8nr09349kDOI Listing
February 2019

Instant hydrogel formation of terpyridine-based complexes triggered by DNA via non-covalent interaction.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

Department of Chemistry, and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, 220 Handan Road, Shanghai 200433, China.

Biomolecule-based hydrogels have potential use in a wide range of applications such as controlled drug release, tissue engineering, and biofabrication. Herein, driven by specific interactions between ds-DNA (double-stranded DNA) and Zn2+ based metal-complexes, we report that the use of DNA as cross-linkers can enhance interactions between self-assembling Zn2+ complexes containing terpyridine and sugar groups in the generation of bioinspired hydrogels from solutions or suspensions. The gelation process is fast and straightforward without tedious steps and happens at room temperature. Read More

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http://dx.doi.org/10.1039/c8nr08532cDOI Listing
February 2019
1 Read

Glowing gold nanoparticle coating: restoring the lost property from bulk gold.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan. and Research Center for Supports to Advanced Science, Division of Instrumental Analysis (Ueda branch), Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan.

The unique electronic, optical, and catalytic properties of AuNPs caused by localized surface plasmon resonance (LSPR) have attracted many scientists, but the LSPR diminishes the captivating luster of bulk gold. An exciting challenge is the fabrication of golden-colored AuNPs, but a decisive factor for controlling the absorption/reflection of AuNPs remains elusive. We now propose a simple and versatile method for the fabrication of glowing AuNPs to restore the "lost golden color" of AuNPs in combination with the deposition of AuNPs on a cellulose filter or a PET/cotton fabric by the successive ionic layer adsorption and reaction (SILAR) method and simple pencil drawing. Read More

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http://dx.doi.org/10.1039/c8nr10016kDOI Listing
February 2019
1 Read

Multi-scale approach for modeling stability, aggregation, and network formation of nanoparticles suspended in aqueous solutions.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

Department of Energy, Politecnico di Torino, Torino, Italy.

Suspensions of nanoparticles (NPs) in aqueous solutions hold promise in many research fields, including energy applications, water desalination, and nanomedicine. The ability to tune NP interactions, and thereby to modulate the NP self-assembly process, holds the key to rationally synthesize NP suspensions. However, traditional models obtained by coupling the DLVO (Derjaguin, Landau, Verwey, and Overbeek) theory of NP interactions, or suitable modifications of it, with the kinetic theory of colloidal aggregation are inadequate to precisely model NP self-assembly because they neglect hydration forces and discrete-size effects predominant at the nanoscale. Read More

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http://dx.doi.org/10.1039/c8nr08782bDOI Listing
February 2019
1 Read

Highly oriented GeSe thin film: self-assembly growth via the sandwiching post-annealing treatment and its solar cell performance.

Nanoscale 2019 Feb 15. Epub 2019 Feb 15.

Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou, 350117, China. and Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen, 361005, China and Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage, Fuzhou, 350117, China.

GeSe is considered as a potential absorber material for thin film solar cells owing to its ideal band gap, strong light absorption, remarkable air durability, Earth-abundance and non-toxic constituents. However, the high vapor pressure of GeSe at a temperature below its melting point makes it difficult to synthesize a high-quality GeSe film. To alleviate this limitation, in this work, a thermal evaporation combining a novel sandwiching post-annealing method was introduced to deposit high quality GeSe thin films with (100)-orientation. Read More

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http://dx.doi.org/10.1039/c8nr09836kDOI Listing
February 2019

Correction: Au@PdO with a PdO-rich shell and Au-rich core embedded in CoO nanorods for catalytic combustion of methane.

Nanoscale 2019 Feb 14. Epub 2019 Feb 14.

CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China and School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.

Correction for 'Au@PdOx with a PdOx-rich shell and Au-rich core embedded in Co3O4 nanorods for catalytic combustion of methane' by Yan Zhu et al., Nanoscale, 2017, 9, 2123-2128. Read More

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http://dx.doi.org/10.1039/c9nr90025jDOI Listing
February 2019

A comparative study demonstrates strong size tunability of carrier-phonon coupling in CdSe-based 2D and 0D nanocrystals.

Nanoscale 2019 Feb 14. Epub 2019 Feb 14.

Institute of Optics and Atomic Physics, Technical University of Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany.

In a comparative study we investigate the carrier-phonon coupling in CdSe based core-only and hetero 2D as well as 0D nanoparticles. We demonstrate that the coupling can be strongly tuned by the lateral size of nanoplatelets, while, due to the weak lateral confinement, the transition energies are only altered by tens of meV. Our analysis shows that an increase in the lateral platelet area results in a strong decrease in the phonon coupling to acoustic modes due to deformation potential interaction, yielding an exciton deformation potential of 3. Read More

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http://dx.doi.org/10.1039/c8nr09458fDOI Listing
February 2019
1 Read

Polarization-controlled unidirectional excitation of surface plasmon polaritons utilizing catenary apertures.

Nanoscale 2019 Feb 14. Epub 2019 Feb 14.

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China. and University of Chinese Academy of Sciences, Beijing 100049, China.

Controlling the propagation direction of surface plasmon polaritons (SPPs) at will using planar structures has been investigated in recent years. However the realization of a high extinction ratio of a SPP directional launcher in a densely integrated and miniaturized way, especially at the wavelength scale, still remains a challenge. To the best of our knowledge, the maximum value of the extinction ratio of a unidirectional SPP launcher based on the planar metasurface in experiment is nearly 250, which relies on the combined effect of several gap-plasmon resonator blocks with a lateral dimension much larger than the incident wavelength. Read More

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http://dx.doi.org/10.1039/c8nr09383kDOI Listing
February 2019
1 Read

Tuning the structure of bifunctional Pt/SmMnO interfaces for promoted low-temperature CO oxidation activity.

Nanoscale 2019 Feb 14. Epub 2019 Feb 14.

State Key Laboratory of Digital Manufacturing Equipment and Technology and School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People's Republic of China.

The interfacial structure of metal-oxide composite catalysts plays a vital role in heterogeneous catalysis, which is crucial to the adsorption and activation of reactants. Herein, the interfacial effects of bare and Fe/Co/Ni doped SmMn2O5 mullite oxide supported Pt clusters on CO oxidation have been investigated by first-principles based microkinetics analysis. A robust formation of Pt/Mn2 trimer structures is demonstrated at the bifunctional interfaces irrespective of the Ptn cluster's size, which can provide spatially separated sites for CO adsorption and O2 dissociation. Read More

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http://dx.doi.org/10.1039/c8nr09054hDOI Listing
February 2019

Stabilizing the structure of LiMnFePOvia the formation of concentration-gradient hollow spheres with Fe-rich surfaces.

Nanoscale 2019 Feb 14. Epub 2019 Feb 14.

Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, NSW 2500, Australia.

LiMnxFe1-xPO4 (LMFP) has attracted extensive interest owing to its high safety and appropriate redox potential. Nevertheless, its poor electrochemical kinetics and structural instability, depending on its manganese content, are still limiting its further application. Herein, we realize a concentration-gradient LiMn0. Read More

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http://dx.doi.org/10.1039/c8nr10224dDOI Listing
February 2019

Direct observation of the fast and robust folding of a slipknotted protein by optical tweezers.

Nanoscale 2019 Feb 14. Epub 2019 Feb 14.

State Key Laboratory of Precision Measuring Technology and Instruments, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, 300072, P. R. China. and Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada.

Understanding the folding mechanism of knotted and slipknotted proteins has attracted considerable interest. Due to their topological complexity, knotted and slipknotted proteins are predicted to fold slowly and involve large topological barriers. Molecular dynamics simulation studies suggest that a slipknotted conformation can serve as an important intermediate to help greatly reduce the topological difficulty during the folding of some knotted proteins. Read More

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http://dx.doi.org/10.1039/c8nr10070eDOI Listing
February 2019

On the origins of the green luminescence in the "zero-dimensional perovskite" CsPbBr: conclusive results from cathodoluminescence imaging.

Nanoscale 2019 Feb 14. Epub 2019 Feb 14.

School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, ACT 2600, Australia.

There is great interest in the use of highly-efficient all-inorganic halide perovskites CsnPbBr2+n for optoelectronic applications. There however remains considerable debate as to the origins of the green luminescence in the zero-dimensional phase of the perovskite Cs4PbBr6, with theories suggesting it originates either from defects in the Cs4PbBr6 lattice or CsPbBr3 impurities/inclusions. The confusion has arisen due to the two phases being miscible and typically co-existing. Read More

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http://dx.doi.org/10.1039/c8nr09255aDOI Listing
February 2019

Emergence of lead halide perovskite colloidal dispersions through aggregation and fragmentation: insights from the nanoscale to the mesoscale.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany. and Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany.

The structural and optoelectronic properties of mixed halide perovskite colloidal precursor dispersions are investigated. With increasing concentration, we observe four stages of growing structures, which affect the thin film morphology: (I) nanoparticles, (II) increasing size of nanoparticles, (III) formation of large aggregates/complex clusters and (IV) fragmentation of large aggregates. Read More

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http://dx.doi.org/10.1039/c8nr09853kDOI Listing
February 2019

Stretchable and transparent nanofiber-networked electrodes based on nanocomposites of polyurethane/reduced graphene oxide/silver nanoparticles with high dispersion and fused junctions.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, Kyeonggi-do 16419, Republic of Korea. and SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon, Kyeonggi-do 16419, Republic of Korea and Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Sungkyunkwan University, Suwon, Kyeonggi-do 16419, Republic of Korea.

Creating stretchable and transparent conductive electrodes for stretchable and transparent electronics is very challenging due to difficulties in obtaining adequate optical and mechanical properties simultaneously. Here, we designed a stretchable and transparent nanofiber-networked electrode (STNNE) based on a networked structure of electrospun stretchable nanofibers made from a mixture of polyurethane (PU)/reduced graphene oxide (rGO)/silver nanoparticles (AgNPs). The STNNE showed a sheet resistance as small as 210 Ω sq-1 at an optical transparency of ∼83%. Read More

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http://dx.doi.org/10.1039/c8nr10170aDOI Listing
February 2019

Two dimensional MoS meets porphyrins via intercalation to enhance the electrocatalytic activity toward hydrogen evolution.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Department of Nano and Advanced Materials, Jeonju University, Chonju, Chonbuk 55069, Republic of Korea.

Two-dimensional MoS2 meets porphyrin molecules to form unique 1T' phase intercalated complexes via a one-step procedure of hydrothermal reactions. The resultant Mn-porphyrin-MoS2 exhibits excellent electrocatalytic activity toward the hydrogen evolution reaction, with a Tafel slope of 35 mV dec-1 and 10 mA cm-2 at an overpotential of 0.125 V. Read More

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http://dx.doi.org/10.1039/c8nr10165eDOI Listing
February 2019

Biological applications of terahertz technology based on nanomaterials and nanostructures.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

College of Biosystems Engineering and Food Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China.

Terahertz (THz) technology is now drawing increasing attention around the world; it has been considered as an efficient non-destructive, non-contact and label-free optical method for biological detection. In this field, nanomaterials and nanostructures have been constantly advancing the development of THz technology. Here, we proposed some latest applications of nanotechnology to improve THz biological detection capability for providing progressive THz systems, thus enabling outstanding detection performance utilizing THz spectroscopy and imaging; these will encourage broader interest in various fields. Read More

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http://dx.doi.org/10.1039/c8nr08676aDOI Listing
February 2019
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Structural and electrical characterization of monolithic core-double shell n-GaN/Al/p-AlGaN nanowire heterostructures grown by molecular beam epitaxy.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, Quebec H3A 0E9, Canada and Department of Electrical Engineering and Computer Science, Center for Photonics and Multiscale Nanomaterials, University of Michigan, Ann Arbor, Michigan 48109, USA.

We have studied the epitaxy and structural characterization of monolithic n-GaN/Al/p-AlGaN nanowire heterostructures. It is found that high quality, nearly defect free, full shell epitaxial Al can be grown in situ on Al(Ga)N nanowires and vice versa. Detailed scanning transmission electron microscopy (STEM), high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) suggest that the Al (111) plane maintains an epitaxial relationship with Al(Ga)N (0001) in the nanowire growth direction. Read More

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http://dx.doi.org/10.1039/c9nr00081jDOI Listing
February 2019
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Functionalized nitrogen-doped carbon dot-modified yolk-shell ZnFeO nanospheres with highly efficient light harvesting and superior catalytic activity.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia.

Volatile organic compounds (VOCs), as hazardous gaseous pollutants, have attracted much attention due to their potential threat to both human health and the environment. Accordingly, photocatalysis technology is seen as a promising technology to control low concentration VOCs due to its mild operation conditions, low energy consumption, and mineralization ability. However, there are some issues with photocatalysts, such as low light utility and fast photogenerated carrier recombination, which need to be addressed for practical applications. Read More

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http://dx.doi.org/10.1039/c8nr08611gDOI Listing
February 2019

Probing a dipeptide-based supramolecular assembly as an efficient camptothecin delivering carrier for cancer therapy: computational simulations and experimental validations.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China.

Short peptide-based supramolecular assemblies have drawn much attention in the field of drug delivery. However, the progress still remains limited owing to the inefficient drug loading capacity of conventional short peptide-based materials. In this study, based on coordinated intramolecular π-π stacking, we customize a dipeptide-based rhein derivative (rhein-diphenylalanine peptide, RDP), which could spontaneously form spherical nanoassemblies for drug delivery. Read More

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http://dx.doi.org/10.1039/c8nr07014hDOI Listing
February 2019

Impact of dimensionality and confinement on the electronic properties of mercury chalcogenide nanocrystals.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris PSL Research University, Sorbonne Université Univ Paris 06, CNRS, 10 rue Vauquelin, 75005 Paris, France.

We demonstrate the growth of 2D nanoplatelets (NPLs) made of a HgTe/CdS heterostructure, with an optical absorption reaching the shortwave infrared range. The material is an interesting platform to investigate the effect of dimensionality (0D vs. 2D) and confinement on the electronic spectrum and carrier dynamics in colloidal materials. Read More

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http://dx.doi.org/10.1039/c8nr09644aDOI Listing
February 2019

Ultrafast molecular sieving through functionalized graphene membranes.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

Graphene shows great promise for advanced filtration membranes with high permeance and enhanced rejection. Here we demonstrate filtration membranes with a nanochannel network for superior separation performance using 100-500 nm-wide graphene nanoplatelets (GnPs) that are efficiently prepared via a green method. The resulting membranes exhibit a well packed layer structure formed by GnPs and are highly stable in water and organic solvents and even in strongly acidic and alkaline media. Read More

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http://dx.doi.org/10.1039/c9nr00356hDOI Listing
February 2019
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Creating a synthetic platform for the encapsulation of nanocrystals with covalently bound polymer shells.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Institute of Physical Chemistry, Fraunhofer CAN, Grindelallee 117, 20146 Hamburg, Germany.

We present a platform for the encapsulation of superparamagnetic iron oxide nanocrystals (SPIONs) with a highly stable diblock copolymer shell allowing a homogeneous dispersion of the nanocrystals into a polymer matrix in the resulting nanocomposites. High polymer shell stability was achieved by crosslinking the inner polydiene shell for example in a persulfate based redox process. The advantage of this crosslinking reaction is the avoidance of heat and UV light for the initiation, making it suitable for heat or UV sensitive systems. Read More

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http://dx.doi.org/10.1039/c8nr10018gDOI Listing
February 2019
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A manganese oxide nanozyme prevents the oxidative damage of biomolecules without affecting the endogenous antioxidant system.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.

Biocompatible nanoparticles with an intrinsic ability to mimic the cellular antioxidant enzymes are potential candidates for the development of new therapeutics for various oxidative stress related disorders. However, the understanding of the interaction and the mechanistic crosstalk between the nanoparticles and the cellular biomolecules is limited. Here we show that the multienzyme mimic manganese(ii,iii) oxide, Mn3O4, in nanoform (Mp) rescues the cells from oxidative damage induced by reactive oxygen species (ROS). Read More

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http://dx.doi.org/10.1039/c8nr09397kDOI Listing
February 2019

A modified "gel-blowing" strategy toward the one-step mass production of a 3D N-doped carbon nanosheet@carbon nanotube hybrid network for supercapacitors.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China.

In this work, we have realized the synchronous and large-scale synthesis of one-dimensional (1D) carbon nanotubes (CNTs) on two-dimensional (2D) N-doped carbon nanosheets (NCNS) by a one-step annealing of a Ni-containing gel precursor. Upon heating, the gel is "blown" into large-sized 2D NCNS with uniformly embedded Ni nanoparticles that can catalyze the in situ CNT growth, forming a three-dimensional (3D) N-doped carbon nanosheet@carbon nanotube (NCNS@CNT) hybrid. Different from our previous "gel-blowing" strategy for 2D nanosheets, the modified "gel-blowing" strategy is capable of producing 3D architecture by employing a new complexing agent and introducing ethanol as a carbon source. Read More

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http://dx.doi.org/10.1039/c8nr10348hDOI Listing
February 2019

In-place bonded semiconductor membranes as compliant substrates for III-V compound devices.

Nanoscale 2019 Feb 12. Epub 2019 Feb 12.

Laboratório Nacional de Nanotecnologia (LNNano), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Campinas, SP, Brasil. and Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas (Unicamp), Campinas, SP, Brasil.

Overcoming the critical thickness limit in pseudomorphic growth of lattice mismatched heterostructures is a fundamental challenge in heteroepitaxy. On-demand transfer of light-emitting structures to arbitrary host substrates is an important technological method for optoelectronic and photonic device implementation. The use of freestanding membranes as compliant substrates is a promising approach to address both issues. Read More

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http://dx.doi.org/10.1039/c8nr08727jDOI Listing
February 2019
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Nanolubricants dispersed with graphene and its derivatives: an assessment and review of the tribological performance.

Nanoscale 2019 Feb 12. Epub 2019 Feb 12.

Surface Engineering & Tribology Division, Council of Scientific and Industrial Research-Central Mechanical Engineering Research Institute, Durgapur - 713209, India. and Academy of Scientific and Innovative Research (AcSIR), CSIR-CMERI Campus, Durgapur - 713209, India.

Graphene, being a path-breaking discovery of this millennium, has become one of the most researched materials lately. Recently, researchers have been exploring the possibilities of utilizing graphene as a dispersoid in a nanolubricant (a stable colloidal suspension of nanoparticles in conventional lubricant). This state-of-the-art review presents an overview of recent developments that have taken place regarding the tribological performance of different types of nanolubricants dispersed with graphene and its derivatives. Read More

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http://dx.doi.org/10.1039/c8nr08240eDOI Listing
February 2019
7.394 Impact Factor

Direct covalent modification of black phosphorus quantum dots with conjugated polymers for information storage.

Nanoscale 2019 Feb 12. Epub 2019 Feb 12.

Key Laboratory for Advanced Materials, Institute of Applied Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.

It has long been recognized that a small switching bias window, which is defined as the difference between the switch-on and switch-off voltages (Δ|VON - VOFF|), and a high ON/OFF current ratio would be greatly favorable to reduce the power consumption of memory devices and to decrease the information misreading rate in digital memory devices. In contrast to two-dimensional BP nanosheets, zero dimensional BP quantum dots (BPQDs) show more exciting physical and chemical properties. By using newly synthesized poly[(9,9-dioctyl-9H-fluorene)-alt-(4-(9H-carbazol-9-yl)aniline)] (PFCz-NH2) as the synthetic precursor, a highly soluble diazotated polymer, PFCz-N2+BF4-, was successfully synthesized and used to react with BPQDs under aqueous conditions to give the first conjugated polymer covalently functionalized BPQDs (PFCz-g-BPQDs). Read More

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http://dx.doi.org/10.1039/c8nr09711aDOI Listing
February 2019
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Large-scale CoS@C hybrids with tunable carbon thickness for high-rate and long-term performances of an aqueous battery.

Nanoscale 2019 Feb 12. Epub 2019 Feb 12.

Key Laboratory of Advanced Energy Materials Chemistry (MOE), Renewable Energy Conversion and Storage Center (ReCast), College of Chemistry, Nankai University, Tianjin 300071, P.R. China.

To realize high-rate and long-term performances of an aqueous rechargeable battery, the most effective approach is to build electrode materials with more reaction active sites and stable structures. Transition metal sulfides have become up-and-coming electrodes due to their high conductivity. Herein, we demonstrated the in situ construction of core-shell Co9S8@C materials with controlled carbon content and thickness. Read More

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http://dx.doi.org/10.1039/c8nr09896dDOI Listing
February 2019

Chemically crosslinked liquid crystalline poly(ionic liquid)s/halloysite nanotubes nanocomposite ionogels with superior ionic conductivity, high anisotropic conductivity and a high modulus.

Nanoscale 2019 Feb 11. Epub 2019 Feb 11.

College of Chemistry & Environmental Science, Hebei University, Baoding, Hebei Province 071002, P. R. China.

A novel type of chemically crosslinked liquid crystalline nanocomposite ionogel electrolyte based on poly(ionic liquid) (PIL) with superior ionic conductivity and high anisotropic conductivity was designed and synthesized using the in situ photopolymerization of sheared soft ionogels containing charged halloysite nanotubes (HNTs) and ionic liquid monomers. The oriented structure was investigated using scanning electron microscopy (SEM) and small-angle X-ray scattering (SAXS). The chemically crosslinked backbone of the PIL and the addition of HNTs endowed the flexible ionogels with a combined very high modulus (up to 26. Read More

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http://xlink.rsc.org/?DOI=C8NR09030K
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http://dx.doi.org/10.1039/c8nr09030kDOI Listing
February 2019
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