15,473 results match your criteria Nanoscale[Journal]


Increased electrode activity during geosmin oxidation provided by Pt nanoparticle-embedded nanocarbon film.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.

The musty odor compound geosmin was electrochemically detected by using Pt nanoparticle (PtNP)-embedded nanocarbon (Pt-C) films formed with unbalanced magnetron (UBM) co-sputtering. The sputtered Pt components formed NPs (typically 1.53-4. Read More

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http://xlink.rsc.org/?DOI=C9NR00793H
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http://dx.doi.org/10.1039/c9nr00793hDOI Listing
April 2019
1 Read

Thulium doped LaF for nanothermometry operating over 1000 nm.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

Group of Nano-Photonics and Imaging, Instituto de Física, Universidade Federal de Alagoas, 57072-900, Maceió-AL, Brazil.

The use and applications of infrared emitting rare-earth luminescent nanoparticles as nanothermometers have attracted a great deal of attention during the last few years. Researchers have regarded rare-earth doped luminescent nanoparticles as appealing systems due to their reliability, sensitivity and versatility for minimally invasive thermal sensing in nanomedicine. The challenge of developing nanothermometers operating over 1000 nm with outstanding brightness and enhanced sensitivity is being constantly addressed. Read More

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http://xlink.rsc.org/?DOI=C9NR00082H
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http://dx.doi.org/10.1039/c9nr00082hDOI Listing
April 2019
1 Read

High piezo-resistive performances of anisotropic composites realized by embedding rGO-based chitosan aerogels into open cell polyurethane foams.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

Institute of Polymers, Composites and Biomaterials, National Research Council, P.le Fermi, 1-80125 Portici, NA, Italy.

Anisotropic aerogel-foam composites were developed by embedding a reduced graphene oxide (rGO)/chitosan aerogel directly into an open-cell polyurethane foam through an in situ bidirectional freeze-drying process. The resulting aerogel-foam composites possess both excellent compression-resilience performance and stable piezo-resistive properties due, respectively, to the excellent mechanical properties of polyurethane foams and to the presence of a chitosan-based aerogel loaded with rGO. The latter, indeed, provides outstanding electrical properties due to its conductive and parallel flat lamellar structure. Read More

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http://dx.doi.org/10.1039/c9nr00157cDOI Listing

Fabrication of biocompatible super stable lubricant-immobilized slippery surfaces by grafting a polydimethylsiloxane brush: excellent boiling water resistance, hot liquid repellency and long-term slippery stability.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, People's Republic of China and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.

Slippery liquid-infused surfaces that imitate the microstructure of carnivorous Nepenthes have attracted widespread attention due to their excellent liquid and various organic solution repellency, associated with broad applications in various fields. However, the complicated preparation processes and poor oil lock ability of slippery liquid-infused surfaces severely restrict their practical application. Herein, lubricant-immobilized slippery surfaces (LISS) were fabricated by grafting polydimethylsiloxane onto ZnO nanorods under ultraviolet light, with residual non-bound silicone oil acting as a lubricant. Read More

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http://xlink.rsc.org/?DOI=C9NR01556F
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http://dx.doi.org/10.1039/c9nr01556fDOI Listing
April 2019
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Advances in lead-free double perovskite nanocrystals, engineering band-gaps and enhancing stability through composition tunability.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

Department of Materials Science and Engineering, Technion - Israel Institute of Technology, 32000 Haifa, Israel. and The Solid-State Institute, Technion - Israel Institute of Technology, 32000 Haifa, Israel.

In this topical review, we have focused on the recent advances made in the studies of lead-free perovskites in the bulk form and as nanocrystals. Substitution of lead in halide perovskites is essential to overcome the toxicity concerns and improve the relatively low stability of these materials. In lead-free double perovskites the unit cell is doubled and two divalent lead cations are replaced by mono and trivalent cations. Read More

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http://dx.doi.org/10.1039/c9nr01031aDOI Listing

Recyclable nanographene-based micromachines for the on-the-fly capture of nitroaromatic explosives.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

Center for the Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology, Technická 5, Prague, Czech Republic. and Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.

It has been more than a decade since nano/micromachines (NMMs) have received the particular attention of scientists in different research fields. They are able to convert chemical energy into mechanical motion in their surrounding environment. Herein, a powerful, efficient and fast strategy of using nanosized reduced graphene oxide flake (n-rGO)-based self-propelled tubular micromachines for the removal of nitroaromatic compounds (NACs) is described. Read More

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http://dx.doi.org/10.1039/c9nr02211bDOI Listing

Nanomaterials with a photothermal effect for antibacterial activities: an overview.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.

Nanomaterials and nanotechnologies have been expected to provide innovative platforms for addressing antibacterial challenges, with potential to even deal with bacterial infections involving drug-resistance. The current review summarizes recent progress over the last 3 years in the field of antibacterial nanomaterials with a photothermal conversion effect. We classify these photothermal nanomaterials into four functional categories: carbon-based nanoconjugates of graphene derivatives or carbon nanotubes, noble metal nanomaterials mainly from gold and silver, metallic compound nanocomposites such as copper sulfide and molybdenum sulfide, and polymeric as well as other nanostructures. Read More

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http://dx.doi.org/10.1039/c9nr01833fDOI Listing

Chiral heteronanotubes: arrangement-dominated chiral interface states and conductivities.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

Department of Physics, Harbin Institute of Technology, Harbin, 150001, P. R. China. and School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.

Structural analogue between pure carbonic nanostructures and their boron nitride counterparts provides possibilities for the fabrication of BCN hetero-nanomaterials, which have attracted widespread interest and been synthesized with stacked-layer, monolayer and tubular morphologies. In this work, the arrangement-dominated chiral interface states and conductivities of BCN heteronanotubes are investigated in detail by first principles calculations. The π-conjugated states can be driven by the high potential barrier of insulating BN domains to form chiral transport states along the interfaces. Read More

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http://dx.doi.org/10.1039/c9nr01996kDOI Listing

Tuning the coupling interface of ultrathin NiS@NiV-LDH heterogeneous nanosheet electrocatalysts for improved overall water splitting.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

School of Materials Science & Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an Shaanxi 710021, P.R. China. and Research Laboratory of Hydrothermal Chemistry, Faculty of Science and Technology, Kochi University, Kochi, 780-8520, Japan.

Tuning the coupling interface of a heterostructured catalyst is an effective approach to achieve abundant surface catalytic active sites and strong electronic interactions among active materials for improving electrocatalytic water splitting performance. Herein, we report a novel heterogeneous catalyst comprising Ni3S2 nanoparticles embedded in ultrathin NiV-layered double hydroxide nanosheet arrays supported on nickel foam, denoted as Ni3S2@NiV-LDH/NF. We demonstrate that the active edge-state length and the surface chemical state of such NiV-LDH-based heterostructures are well modulated by tailoring the coupling interfaces, resulting in the exposure of more catalytic reaction sites and enhancement of the electronic interactions between NiV-LDH and Ni3S2, thus greatly promoting the water dissociation kinetics. Read More

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http://xlink.rsc.org/?DOI=C9NR00658C
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http://dx.doi.org/10.1039/c9nr00658cDOI Listing
April 2019
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Nanoislands as plasmonic materials.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

Department of Bio and Brain Engineering, KAIST Institute for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Dahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.

Subwavelength metal nanoislands thermally dewetted from a thin film emerge as a powerful and cost-effective photonic material, due to the formation of substantially strong nano-gap-based plasmonic hot spots and their simple large-area nanofabrication. Unlike conventional nanostructures, nanoislands dewetted from thin metal films can be formed on a large scale at the wafer level and show substrate-dependent plasmonic phenomena across a broad spectral range from ultraviolet to infrared. Substrate-selective dewetting methods for metal nanoislands enable diverse nanophotonic and optoelectronic technologies, underlining mechanical, structural, and material properties of a substrate. Read More

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http://dx.doi.org/10.1039/c8nr10539aDOI Listing

Plasmonic-enhanced catalytic activity of methanol oxidation on Au-graphene-Cu nanosandwiches.

Nanoscale 2019 Apr 23. Epub 2019 Apr 23.

School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China.

The plasmonic-enhanced catalytic activity of methanol oxidation on Au-based catalysts provides a promising strategy for direct methanol fuel cells (DMFCs) to avoid the CO poisoning of traditional Pt-based catalysts. However, the effect of surface plasmon resonance on the light-enhanced methanol oxidation activity of Au or Au-based catalysts has not been fully understood. The mechanism by which hot plasmonic carriers participate in the methanol oxidation reaction (MOR) has not been elucidated. Read More

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http://dx.doi.org/10.1039/c9nr00361dDOI Listing

The dealloying-lithiation/delithiation-realloying mechanism of a breithauptite (NiSb) nanocrystal embedded nanofabric anode for flexible Li-ion batteries.

Nanoscale 2019 Apr 18. Epub 2019 Apr 18.

Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China. and Shenzhen Research Institute of Nanjing University, Shenzhen 518063, China.

Antimony (Sb) based anodes with high conductivity and capability have shown great promise for applications in lithium ion batteries (LIBs). However, they often suffer from poor cycling stability because of the drastic volume variation and structural degradation on undergoing lithiation-delithiation processes. Here we demonstrate a novel Sb-based anode with a free-standing structure realized by uniformly implanting intermetallic compound breithauptite (nickel antimonide, NiSb) nanocrystals into nitrogen-doped carbon nanofibers (NiSb@NCNFs). Read More

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http://dx.doi.org/10.1039/c9nr00159jDOI Listing

A spherical nucleic acid-based two-photon nanoprobe for RNase H activity assay in living cells and tissues.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Institute of Chemical Biology and Nanomedicine, Hunan University, Changsha, 410082, China.

We report here a two-photon nanoprobe for the detection of RNase H activity in living cells and ex vivo tissues by combining a two-photon dye with a spherical nucleic acid (SNA) featuring a DNA/RNA duplex corona and a gold nanoparticle core. Read More

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http://dx.doi.org/10.1039/c9nr00880bDOI Listing
April 2019
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Polydopamine nanosphere@silver nanoclusters for fluorescence detection of multiplex tumor markers.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, P. R. China. and University of Science and Technology of China, Hefei 230026, P. R. China and Jinan Guokeyigong Science and Technology Development Co., Ltd, Jinan 250103, P. R. China.

There is an increasing demand to establish a convenient and stable analytical methodology for screening multiplex tumor markers in early diagnosis of cancers. In this work, an innovative fluorescence method is proposed for simultaneous detection of alpha-fetoprotein (AFP) and carcinoembryonic antigen (CEA). A polydopamine nanosphere@silver nanocluster (PDAN@AgNC) system is introduced for fluorescence quenching and recovery. Read More

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http://xlink.rsc.org/?DOI=C9NR01307E
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http://dx.doi.org/10.1039/c9nr01307eDOI Listing
April 2019
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An overview of the recent advances in inorganic nanotubes.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

Department of Materials and Interfaces, Weizmann Institute, Herzl Street 234, 76100, Rehovot, Israel.

Advanced nanomaterials play a prominent role in nanoscience and nanotechnology developments, opening new frontiers in these areas. Among these nanomaterials, due to their unique characteristics and enhanced chemical and physical properties, inorganic nanotubes have been considered one of the most interesting nanostructures. In recent years, important progress has been achieved in the production and study of these nanomaterials, including boron nitride, transition metal dichalcogenide nanotubular structures, misfit-based nanotubes and other hybrid/doped nanotubular objects. Read More

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http://xlink.rsc.org/?DOI=C9NR01880H
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http://dx.doi.org/10.1039/c9nr01880hDOI Listing
April 2019
2 Reads

Lysosome-targeted carbon dots for ratiometric imaging of formaldehyde in living cells.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, USA.

Formaldehyde (FA) is involved in many biological processes and is closely connected with many diseases including Alzheimer's disease and cancer. Therefore, methods for sensitive and selective detection of FA in living cells are highly demanded. As a new class of carbon nanomaterials, carbon dots (CDs) have attracted great attention owing to their robust photostability, good biocompatibility and environmental friendliness. Read More

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http://xlink.rsc.org/?DOI=C9NR01678C
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http://dx.doi.org/10.1039/c9nr01678cDOI Listing
April 2019
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Artificial muscle with reversible and controllable deformation based on stiffness-variable carbon nanotube spring-like nanocomposite yarn.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P. R. China. and Shenzhen STRONG Advanced Materials Research Institute Co., Ltd., Shenzhen 518000, P. R. China.

Carbon nanotube yarn actuators are in great demand for flexible devices or intelligent applications. Artificial muscles based on carbon nanotube yarn have achieved great progress over past decades. However, uncontrollable, small deformations and relatively slow deformation recovery are still great challenges for carbon nanotube yarn artificial muscles. Read More

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http://dx.doi.org/10.1039/c9nr00611gDOI Listing

Lightweight and flexible hybrid film based on delicate design of electrospun nanofibers for high-performance electromagnetic interference shielding.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

School of Materials Science and Technology, Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin, 300401, People's Republic of China. and National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, People's Republic of China.

High-performance electromagnetic interference (EMI) shielding materials possess features of light weight, flexibility and excellent EMI shielding effectiveness. However, continuous efforts are still needed to satisfy the urgent demand for electromagnetic pollution shielding. In this study, a lightweight and flexible hybrid film with a multi-scale double-continuous conductive network (TiO2/SiO2@PPy) and sandwich structure (TiO2/SiO2@PPy@rGO) was prepared via a delicate structure design of electrospun TiO2/SiO2 nanofibers. Read More

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http://dx.doi.org/10.1039/c9nr02102gDOI Listing

Plasmon-induced hot-carrier generation differences in gold and silver nanoclusters.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

CONICET & Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Padre Jorge Contreras 1300, Mendoza, Argentina.

In the last thirty years, the study of plasmonic properties of noble metal nanostructures has become a very dynamic research area. The design and manipulation of matter in the nanometric scale demands a deep understanding of the underlying physico-chemical processes that operate in this size regimen. Here, a fully atomistic study of the spectroscopic and photodynamic properties of different icosahedral silver and gold nanoclusters has been carried out by using a Time-Dependent Density Functional Tight-Binding (TD-DFTB) model. Read More

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http://xlink.rsc.org/?DOI=C9NR01352K
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http://dx.doi.org/10.1039/c9nr01352kDOI Listing
April 2019
2 Reads

Enhancing water permeation through alumina membranes by changing from cylindrical to conical nanopores.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemical and Biomolecular Engineering, National University of Singapore, 117576, Singapore.

In the quest for next-generation ceramic membranes, an embodiment of the gradient conical pore structure is foreseen as an intriguing route. In this proof-of-concept simulation study, we investigate water permeation through alumina membranes consisting of cylindrical and conical nanopores, respectively. For the cylindrical nanopores, water permeability increases with increasing the nanopore diameter (2. Read More

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http://xlink.rsc.org/?DOI=C8NR09602C
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http://dx.doi.org/10.1039/c8nr09602cDOI Listing
April 2019
1 Read

Packaging of DNA origami in viral capsids.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

Geza Ad Ltd, Givatayim 53251, Israel.

Here we show the encapsulation of 35 nm diameter, nearly-spherical, DNA origami by self-assembly of SV40-like (simian virus 40) particles. The self-assembly of this new type of nanoparticles is highly reproducible and efficient. The structure of these particles was determined by cryo-EM. Read More

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http://xlink.rsc.org/?DOI=C8NR10113B
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http://dx.doi.org/10.1039/c8nr10113bDOI Listing
April 2019
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Ultrathin 2D nitrogen-doped carbon nanosheets for high performance supercapacitors: insight into the effects of graphene oxides.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China.

Ultrathin 2D nitrogen-doped carbon nanosheets with a thickness of about 5 nm have been facilely synthesized from potato starch by using graphene oxides (GO) as the structure-directing agent. The pore structures and surface properties can be feasibly and rationally tailored by addition of a certain amount of GO in the precursor. The addition of GO to the potato starch can increase the surface areas and the pyridinic-N and pyrrolic-N ratios of the as-prepared 2D carbon nanosheets. Read More

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http://dx.doi.org/10.1039/c9nr01290gDOI Listing

Substituent effects of AIE-active α-cyanostilbene-containing triphenylamine derivatives on electrofluorochromic behavior.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

Institute of Polymer Science and Engineering, National Taiwan University, 1 Roosevelt Road, 4th Sec., Taipei 10617, Taiwan. and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan.

Four aggregation-induced emission (AIE)- and electro-active cyanostilbene-based triphenylamine-containing derivatives with different substituents were synthesized to investigate their effects on the photoluminescence properties and electrochromic (EC) and electrofluorochromic (EFC) behavior of gel-type electrochromic devices (ECDs). The optical and photoluminescence properties of the obtained materials were influenced by the substituents, and revealed AIE-active characteristics, exhibiting stronger fluorescence intensity in the aggregated state than in solution. Consequently, the EFC devices could be fabricated by combining these AIE- and electro-active materials with cathodic EC heptyl viologen HV into the gel-type electrolyte system to enhance the emission intensity, on/off contrast ratio, and response capability. Read More

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http://dx.doi.org/10.1039/c9nr02692dDOI Listing

High-speed scanning ion conductance microscopy for sub-second topography imaging of live cells.

Nanoscale 2019 Apr 17. Epub 2019 Apr 17.

Institute of Applied Physics, University of Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany.

Scanning ion conductance microscopy (SICM) is an emerging tool for non-invasive and high-resolution topography imaging of live cells. However, the imaging speed of conventional SICM setups is slow, requiring several seconds or even minutes per image, thereby making it difficult to study cellular dynamics. Here, we describe a high-speed SICM (HS-SICM) setup for topography imaging in the hopping mode with a pixel rate of 11. Read More

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http://dx.doi.org/10.1039/c8nr10162kDOI Listing

Ultra-long distance carrier transportation in bandgap-graded CdSSe nanowire waveguides.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha 410082, People's Republic of China.

Carrier transportation in semiconductor nanowires is essential for their application in integrated opto-electronic devices. Therefore, it is of importance to manipulate and enhance the transportation performance of nanowires through micro-nano scale engineering. In this work, the carrier dynamics of the waveguides in the bandgap-graded CdSxSe1-x nanowires is systematically investigated. Read More

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http://dx.doi.org/10.1039/c9nr01800jDOI Listing

Thermal transport through fishbone silicon nanoribbons: unraveling the role of Sharvin resistance.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235, USA.

Heat conduction has been shown to be greatly suppressed in Si nanomeshes, which has attracted extensive attention for potential thermoelectric applications, yet the precise suppression mechanism remains to be fully understood. Attempting to further disclose the underlying mechanisms, we report on the thermal conductivity of the building block for nanomeshes, i.e. Read More

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http://xlink.rsc.org/?DOI=C9NR01855G
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http://dx.doi.org/10.1039/c9nr01855gDOI Listing
April 2019
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O, NO and NH coordination to Co-porphyrin studied with scanning tunneling microscopy on Au(111).

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Department of Physics, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.

The coordination structure between small molecules and metalloporphyrins plays a crucial role in functional reactions such as bio-oxidation and catalytic activation. Their vertical, tilting, and dynamic structures have been actively studied with diffraction and resonance spectroscopy for the past four decades. Contrastingly, real-space visualization beyond simple protrusion and depression is relatively rare. Read More

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http://xlink.rsc.org/?DOI=C9NR00843H
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http://dx.doi.org/10.1039/c9nr00843hDOI Listing
April 2019
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Multi-quantum-well quantum dots with stable dual emission.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei, P. R. China. and Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin 300401, P. R. China.

Multi-quantum-well quantum dots (MQW-QDs) with multiple emission peaks have been evaluated as promising single source emitters in the fabrication of high performance white LEDs. However, they still face a critical issue of color shift in practical applications, which is mainly attributed to the redistribution of the excitons between the adjacent wells under different excitation powers. Herein, we report sandwich structural MQW-QDs that provide highly stable dual emission. Read More

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http://xlink.rsc.org/?DOI=C9NR00177H
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http://dx.doi.org/10.1039/c9nr00177hDOI Listing
April 2019
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Lattice constant-dependent anchoring effect of MXenes for lithium-sulfur (Li-S) batteries: a DFT study.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Department of Materials Science& Engineering, City University of Hong Kong, Hong Kong, China. and Center for Advance Nuclear Safety and Sustainable Development, City University of Hong Kong, Hong Kong, China.

The anchoring effect of the cathode plays a significant role in improving the performance of lithium-sulfur (Li-S) batteries. MXenes, a new class of two-dimensional materials, have been reported to be effective sulfur hosts for Li-S batteries. However, previous studies mainly focused on Ti-based MXenes, while other potential transition metal MXenes have not been systematically explored. Read More

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http://dx.doi.org/10.1039/c9nr01220fDOI Listing

Percolating conductive networks in multiwall carbon nanotube-filled polymeric nanocomposites: towards scalable high-conductivity applications of disordered systems.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Institute for NanoEnergy, Department of Physics, University of Houston, Science and Research Building 1, Houston, Texas 77204, USA.

Disordered polymeric composite systems ordinarily exhibit poor bulk electronic transport properties, restricting their use to low-conductivity applications. In this work, highly electroconductive multi-walled carbon nanotube (MWCNT)/polyurethane (PU) nanocomposites were assembled via an aqueous solvent-blending method. Low percolation thresholds of 0. Read More

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http://dx.doi.org/10.1039/c9nr00216bDOI Listing

Purification and structural elucidation of carbon dots by column chromatography.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Friedrich-Alexander University Erlangen-Nürnberg, Institute of Particle Technology, Cauerstrasse 4, 91058 Erlangen, Germany.

Carbon dots (CDs) are an astonishing class of fluorescent materials with many applications in bioimaging, drug delivery, photovoltaics and photocatalysis due to their outstanding luminescence properties and low toxicity. However, the internal CD structure of bottom-up synthesized CDs is still the subject of considerable debate. Unambiguous analysis of the internal CD composition is hampered by the fact that reaction products usually contain mixtures of several CD fractions as well as molecular intermediate and side products. Read More

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http://xlink.rsc.org/?DOI=C9NR01029G
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http://dx.doi.org/10.1039/c9nr01029gDOI Listing
April 2019
5 Reads

Controllable synthesis of MoS@MoO nanonetworks for enhanced NO room temperature sensing in air.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education. School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, P. R. China.

MoS2 nanosheets (NSs) are a promising gas sensing material at room temperature (RT) due to their unique properties and structures. Unfortunately, the activity of pure MoS2 NSs is highly affected by the adsorption of atmospheric oxygen, which strongly influences the stability of MoS2 sensing devices and significantly hinders the practical applications of these sensors in air. Heterostructure formation may be an effective approach to modulate the intrinsic electronic properties of MoS2 NSs. Read More

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http://xlink.rsc.org/?DOI=C9NR00137A
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http://dx.doi.org/10.1039/c9nr00137aDOI Listing
April 2019
6 Reads

Effect of polymer nanolayers on tin-chalcogenide nanosheet/conductive polymer flexible composite films and their enhanced thermoelectric performance.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

School of Chemical Engineering & Materials Science, Chung-Ang University, Seoul 06974, Republic of Korea.

The chemical exfoliation of SnSe0.97Te0.03 nanosheets is performed via a solid-state reaction, ball-milling, lithium intercalation, and a hydrothermal exfoliation reaction from atomic materials, and the potential of flexible thermoelectric composite films for practical applications is demonstrated. Read More

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http://dx.doi.org/10.1039/c9nr01345hDOI Listing

A new device concept for bacterial sensing by Raman spectroscopy and voltage-gated monolayer graphene.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Department of Chemistry, Myongji University, Yongin, South Korea.

Electron-phonon coupling in monolayer graphene results in a modification of its Raman spectra upon charge transfer processes induced by interaction with its chemical environment or the presence of strain or defects in its structure. Modification of Raman spectra is examined in order to develop ultra-sensitive biosensing techniques for the detection, identification, differentiation and classification of bacteria associated with infectious diseases. Specifically, the electrochemical properties of top gated monolayer graphene on SiO2/Si substrates, in the absence and presence of interaction with Gram-positive bacteria (Enterococcus faecalis, Bacillus subtilis) and Gram-negative bacteria (Escherichia coli and Salmonella typhimurium), are probed by Raman spectroscopy in an applied voltage range from 0 V to 3 V. Read More

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http://dx.doi.org/10.1039/c8nr10010aDOI Listing
April 2019
2 Reads

Highly tunable nonlinear response of Au@WS hybrids with plasmon resonance and anti-Stokes effect.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China. and The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China.

We synthesize Au@WS2 hybrid nanobelts and investigate their third-order nonlinear responses mediated by a strong anti-Stokes effect. By using the femtosecond Z-scan technique and tuning the excitation photon energy (Eexc), we find the sign reversals of both nonlinear absorption coefficient β and nonlinear refractive index γ to be around 1.60 eV, which is prominently higher than the bandgap (1. Read More

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http://xlink.rsc.org/?DOI=C8NR09946D
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http://dx.doi.org/10.1039/c8nr09946dDOI Listing
April 2019
2 Reads

Viscosity and fragility of confined polymer nanocomposites: a tale of two interfaces.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Department of Physics, Indian Institute of Science, Bangalore, 560012, India.

Viscosity and fragility are key parameters determining the processability and thermo-mechanical stability of glassy polymers and polymer nanocomposites (PNCs). In confined polymers, these parameters are largely dominated by the long relaxation times of the polymers adsorbed at the substrate-polymer interface. On the other hand, for polymer nanocomposites, the interface layer (IL) between the nanoparticles and the surrounding matrix chains often control not only the morphology and dispersion but also various parameters like viscosity and glass transition temperature. Read More

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http://xlink.rsc.org/?DOI=C8NR10362C
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http://dx.doi.org/10.1039/c8nr10362cDOI Listing
April 2019
2 Reads
7.394 Impact Factor

The shape-controlled synthesis of gallium-palladium (GaPd) nanomaterials as high-performance electrocatalysts for the hydrogen evolution reaction.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Department of Chemical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013, Republic of China.

Recently, great efforts have been focused on developing more active and stable Pd-based electrocatalysts to partially or completely replace rare and costly Pt. We developed a facile hot injection method and successfully synthesized well-dispersed and shape-controlled GaPd2 nanomaterials including polyhedrons, nanoparticles and nanowires. All the as-synthesized catalysts exhibit superior HER activity compared to commercial pure Pd catalysts and are stable in acidic media. Read More

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http://dx.doi.org/10.1039/c8nr10536gDOI Listing

Online fabrication of ultralight, three-dimensional, and structurally stable ultrafine fibre assemblies with a double-porous feature.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China. and Department of Nonwoven Materials & Engineering, College of Textiles, Donghua University, Shanghai 201620, China.

Ultrafine fibre assemblies have been proved to be desirable in many applications, including environmental protection, energy conversion, tissue engineering, etc. However, the positive correlation between the fibre diameter and pore size confines most of these fibre assemblies to two-dimensional (2D) structures, while existing solutions for this problem suffer from limitations in that the fabrication processes are complicated and the resultant three-dimensional (3D) structures are vulnerable to external forces. Herein, we report a continuous and versatile strategy for fabricating 3D ultrafine fibre assemblies with a double-porous feature. Read More

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http://dx.doi.org/10.1039/c9nr01477bDOI Listing

2D MXene nanosheets enable small-sulfur electrodes to be flexible for lithium-sulfur batteries.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, China 100029.

Lithium-sulfur batteries are one of the most promising energy storage devices with high energy density, but their practical application is hindered by the serious capacity fading due to the shuttle effect resulting from the migration of polysulifdes during charge-discharge. Using small sulfur molecules (S2-4), in place of conventional cyclo-S8, as cathode materials is an efficient method to fundamentally eradicate the shuttle effect. To satisfy the demands of flexible electronic devices, in this paper, two-dimensional (2D) MXene nanosheets were used as a conductive binder and flexible backbone to combine with the S2-4/carbon composite, fabricating a flexible small-sulfur electrode for lithium-sulfur batteries. Read More

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http://dx.doi.org/10.1039/c8nr09653hDOI Listing

Gold nanoholes fabricated by colloidal lithography: novel insights into nanofabrication, short-range correlation and optical properties.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Institute for Microelectronics and Microsystems, IMM-CNR, Via Monteroni, I-73100 Lecce, Italy.

Colloidal lithography is widely used as a low cost and large-area deposition approach, alternative to the conventional small-area expensive lithographic techniques, for the fabrication of short-range ordered sub-wavelength metallic nanostructures. This paper contributes to the understanding of the impact of the fabrication protocol of a colloidal mask on the optical and sensing properties of short range-ordered nanohole (NH) distributions fabricated by colloidal lithography in optically thin (20 nm thick) gold films. We consider polystyrene nanospheres (PS-NSPs) with a nominal diameter of 80 nm, electrostatically adsorbed from a salt-free colloidal solution onto a polydiallyldimethylammonium (PDDA) countercharged monolayer. Read More

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http://dx.doi.org/10.1039/c8nr09911aDOI Listing

Hierarchical multi-level block copolymer patterns by multiple self-assembly.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering & Technology (KICET) 101 Soho-ro, Jinju 52851, Republic of Korea. and Global Frontier R&D Center for Hybrid Interface Materials, Busan 46241, Republic of Korea.

Uniform, well-ordered sub-20 nm patterns can be generated by the templated self-assembly of block copolymers (BCPs) with a high Flory-Huggins interaction parameter (χ). However, the self-assembled BCP monolayers remain limited in the possible structural geometries. Here, we introduce a multiple self-assembly method which uses di-BCPs to produce diverse morphologies, such as dot, dot-in-honeycomb, line-on-dot, double-dot, pondering, dot-in-pondering, and line-on-pondering patterns. Read More

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http://xlink.rsc.org/?DOI=C9NR00774A
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http://dx.doi.org/10.1039/c9nr00774aDOI Listing
April 2019
3 Reads
7.394 Impact Factor

Dehydration impeding ionic conductance through two-dimensional angstrom-scale slits.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Complex System Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China.

There has been long-standing academic interest in the study of ion transport in nanochannel systems, owing to its vast implications in understanding the nature of numerous environmental, biological and chemical processes. Here, we investigate ion transport through two-dimensional slits using molecular dynamics simulations. These slits with angstrom-scale height dimensions can be realistically replicated in the simulation, which leads to direct comparisons between simulations and experiments. Read More

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http://xlink.rsc.org/?DOI=C9NR00317G
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http://dx.doi.org/10.1039/c9nr00317gDOI Listing
April 2019
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Gradient-band-gap strategy for efficient solid-state PbS quantum-dot sensitized solar cells.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

School of Chemistry and Chemical Engineering, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei, 230009, P. R. China.

To improve charge separation and enhance open-circuit voltage (Voc) in solid-state quantum-dot sensitized solar cells (QDSCs), gradient-band-gap PbS quantum-dots were first and easily constructed by two-step spin-coating the Pb(NO3)2 solution and the mixed solution of Na2S and 1,2-ethanedithiol via successive ionic layer absorption and reaction (SILAR). The fabricated solid-state gradient-band-gap PbS QDSCs exhibited a Voc of 0.70 V, a short-circuit photocurrent density (Jsc) of 9. Read More

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http://dx.doi.org/10.1039/c9nr00324jDOI Listing

Fluid release pressure for nanochannels: the Young-Laplace equation using the effective contact angle.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Jiangsu Key Laboratory for Design & Manufacture of Micro/Nano Biomedical Instruments and School of Mechanical Engineering, Southeast University, Nanjing 210096, P.R. China.

Releasing fluids from nanochannels is quite challenging, yet crucial for the application of nanofluidic systems, e.g. drug delivery and nanoprinting. Read More

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http://dx.doi.org/10.1039/c8nr08987fDOI Listing
April 2019
1 Read

An investigation into the factors governing the oxidation of two-dimensional TiC MXene.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Global Nanotechnology Development Team, National Nano Fab Center (NNFC), Daejeon 34141, South Korea.

Two-dimensional (2D) transition metal carbides (MXenes) exhibit outstanding performances in many applications, such as energy storage, optoelectronics, and electrocatalysts. However, colloidal solutions of Ti3C2Tx MXene flakes deteriorate rapidly under ambient conditions due to the conversion of the titanium carbide to titanium dioxide. Here, we discuss the dominant factors influencing the rate of oxidation of Ti3C2Tx MXene flakes, and present guidelines for their storage with the aim of maintaining the intrinsic properties of the as-prepared material. Read More

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http://xlink.rsc.org/?DOI=C9NR00084D
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http://dx.doi.org/10.1039/c9nr00084dDOI Listing
April 2019
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Simple fabrication of layered halide perovskite platelets and enhanced photoluminescence from mechanically exfoliated flakes.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.

Rapid progress on the fabrication of lead halide perovskite crystals has led to highly promising performance in optoelectronic devices, particularly from three-dimensional crystals. Recently, these efforts have been extended to layered perovskite structures, motivated in part by their good environmental stability. Furthermore, layered perovskites represent a nanocrystal system with micron-size extensions and strong confinement in one dimension that is highly appealing for studying fundamental photophysics. Read More

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http://dx.doi.org/10.1039/c9nr00638aDOI Listing

Click-conjugated photon-upconversion nanoparticles in an immunoassay for honeybee pathogen Melissococcus plutonius.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

CEITEC MU, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic.

European foulbrood (EFB) is an infectious disease affecting honeybee larvae caused by the bacterium Melissococcus plutonius. The enzyme-linked immunosorbent assay (ELISA) is the gold standard for antibody-based bacteria detection, however, its sensitivity is not high enough to reveal early-stage EFB infection. Photon-upconversion nanoparticles (UCNPs) are lanthanide-doped nanomaterials that emit light of shorter wavelength under near-infrared (NIR) excitation and thus avoid optical background interference. Read More

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http://dx.doi.org/10.1039/c9nr01246jDOI Listing

Controllable defect driven symmetry change and domain structure evolution in BiFeO with enhanced tetragonality.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.

Defect engineering has been a powerful tool to enable the creation of exotic phases and the discovery of intriguing phenomena in ferroelectric oxides. However, the accurate control of the concentration of defects remains a big challenge. In this work, ion implantation, which can provide controllable point defects, allows us to produce a controlled defect driven true super-tetragonal (T) phase with a single-domain-state in ferroelectric BiFeO3 thin films. Read More

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http://dx.doi.org/10.1039/c9nr00932aDOI Listing
April 2019
1 Read

One-step synthesis and XPS investigations of chiral NHC-Au(0)/Au(i) nanoparticles.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Institute of Inorganic Chemistry, University of Vienna, Faculty of Chemistry, Waehringer Strasse 42, 1090 Vienna, Austria.

Although N-heterocyclic carbenes (NHCs) have been demonstrated as suitable ligands for the stabilisation of gold nanoparticles (AuNPs) through a variety of methods, the manner in which such AuNPs form is yet to be fully elucidated. We report a simple and fast one-step synthesis of uniform chiral (l/d)-histidin-2-ylidene stabilised gold nanoparticles using the organometallic Au(i) complex as a well defined starting material. The resulting nanoparticles have an average size of 2. Read More

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http://xlink.rsc.org/?DOI=C9NR00905A
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http://dx.doi.org/10.1039/c9nr00905aDOI Listing
April 2019
2 Reads

WS monolayer-based light-emitting devices in a vertical p-n architecture.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen, Bismarckstraße 81, 47057 Duisburg, Germany.

2D semiconductors represent an exciting new material class with great potential for optoelectronic devices. In particular, WS2 monolayers are promising candidates for light-emitting devices (LEDs) due to their direct band gap with efficient recombination in the red spectral range. Here, we present a novel LED architecture by embedding exfoliated WS2 monolayer flakes into a vertical p-n layout using organic p- and inorganic n-supporting layers. Read More

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http://dx.doi.org/10.1039/c9nr01573fDOI Listing