10,372 results match your criteria Adv. Mater. Weinheim[Journal]


Graphitic Carbon Nitride (g-C N )-Derived N-Rich Graphene with Tuneable Interlayer Distance as a High-Rate Anode for Sodium-Ion Batteries.

Adv Mater 2019 Apr 18:e1901261. Epub 2019 Apr 18.

School of Chemical Engineering, The University of Adelaide, Adelaide, SA, 5005, Australia.

Heteroatom-doped carbon materials with expanded interlayer distance have been widely studied as anodes for sodium-ion batteries (SIBs). However, it remains unexplored to further enlarge the interlayer spacing and reveal the influence of heteroatom doping on carbon nanostructures for developing more efficient SIB anode materials. Here, a series of N-rich few-layer graphene (N-FLG) with tuneable interlayer distance ranging from 0. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019012
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http://dx.doi.org/10.1002/adma.201901261DOI Listing
April 2019
1 Read
17.493 Impact Factor

Phenothiazine-Based Organic Catholyte for High-Capacity and Long-Life Aqueous Redox Flow Batteries.

Adv Mater 2019 Apr 18:e1901052. Epub 2019 Apr 18.

Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.

Redox-active organic materials have been considered as one of the most promising "green" candidates for aqueous redox flow batteries (RFBs) due to the natural abundance, structural diversity, and high tailorability. However, many reported organic molecules are employed in the anode, and molecules with highly reversible capacity for the cathode are limited. Here, a class of heteroaromatic phenothiazine derivatives is reported as promising positive materials for aqueous RFBs. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019010
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http://dx.doi.org/10.1002/adma.201901052DOI Listing
April 2019
1 Read

Anti-Ambipolar Transport with Large Electrical Modulation in 2D Heterostructured Devices.

Adv Mater 2019 Apr 18:e1901144. Epub 2019 Apr 18.

CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China.

Van der Waals materials and their heterostructures provide a versatile platform to explore new device architectures and functionalities beyond conventional semiconductors. Of particular interest is anti-ambipolar behavior, which holds potentials for various digital electronic applications. However, most of the previously conducted studies are focused on hetero- or homo- p-n junctions, which suffer from a weak electrical modulation. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019011
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http://dx.doi.org/10.1002/adma.201901144DOI Listing
April 2019
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Efficient and Stable CsPbI Solar Cells via Regulating Lattice Distortion with Surface Organic Terminal Groups.

Adv Mater 2019 Apr 18:e1900605. Epub 2019 Apr 18.

State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, China.

All-inorganic cesium lead iodide perovskites (CsPbI ) are promising wide-bandgap materials for use in the perovskite/silicon tandem solar cells, but they easily undergo a phase transition from a cubic black phase to an orthorhombic yellow phase under ambient conditions. It is shown that this phase transition is triggered by moisture that causes distortion of the corner-sharing octahedral framework ([PbI ] ). Here, a novel strategy to suppress the octahedral tilting of [PbI ] units in cubic CsPbI by systematically controlling the steric hindrance of surface organic terminal groups is provided. Read More

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http://dx.doi.org/10.1002/adma.201900605DOI Listing

Design of Bistable Gold@Spin-Crossover Core-Shell Nanoparticles Showing Large Electrical Responses for the Spin Switching.

Adv Mater 2019 Apr 18:e1900039. Epub 2019 Apr 18.

Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/Catedrático José Beltrán 2, Paterna, 46980, Spain.

A simple chemical protocol to prepare core-shell gold@spin-crossover (Au@SCO) nanoparticles (NPs) based on the 1D spin-crossover [Fe(Htrz) (trz)](BF ) coordination polymer is reported. The synthesis relies on a two-step approach consisting of a partial surface ligand substitution of the citrate-stabilized Au NPs followed by the controlled growth of a very thin layer of the SCO polymer. As a result, colloidally stable core@shell spherical NPs with a Au core of ca. Read More

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http://dx.doi.org/10.1002/adma.201900039DOI Listing

Phase-Controlled Synthesis of Monolayer Ternary Telluride with a Random Local Displacement of Tellurium Atoms.

Adv Mater 2019 Apr 17:e1900862. Epub 2019 Apr 17.

School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.

Alloying 2D transition metal dichalcogenides has opened up new opportunities for bandgap engineering and phase control. Developing a simple and scalable synthetic route is therefore essential to explore the full potential of these alloys with tunable optical and electrical properties. Here, the direct synthesis of monolayer WTe S alloys via one-step chemical vapor deposition (CVD) is demonstrated. Read More

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http://dx.doi.org/10.1002/adma.201900862DOI Listing

Quasicrystal Photonic Metasurfaces for Radiation Controlling of Second Harmonic Generation.

Adv Mater 2019 Apr 17:e1901188. Epub 2019 Apr 17.

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.

Photonic metasurfaces, a kind of 2D structured medium, represent a novel platform to manipulate the propagation of light at subwavelength scale. In linear optical regime, many interesting topics such as planar meta-lenses, metasurface optical holography, and so on have been widely investigated. Recently, metasurfaces have gone into the nonlinear optical regime. Read More

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April 2019
8 Reads

Single-Stimulus-Induced Modulation of Multiple Optical Properties.

Adv Mater 2019 Apr 18:e1900388. Epub 2019 Apr 18.

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University-Western University Centre for Synchrotron Radiation Research, Soochow University, Suzhou, 215123, P. R. China.

Stimuli-responsive smart optical materials hold great promise for applications in active optics, display, sensing, energy conversion, military camouflage, and artificial intelligence. However, their applications are greatly restricted by the difficulty of tuning different optical properties within the same material, especially by a single stimulus. Here, magnetic modulations of multiple optical properties are demonstrated in a crystalline colloidal array (CCA) of magnetic nanorods. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019003
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April 2019
1 Read

Evidence of Spin Frustration in a Vanadium Diselenide Monolayer Magnet.

Adv Mater 2019 Apr 18:e1901185. Epub 2019 Apr 18.

Centre for Advanced 2D Materials (CA2DM) and Graphene Research Centre (GRC), National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore.

Monolayer VSe , featuring both charge density wave and magnetism phenomena, represents a unique van der Waals magnet in the family of metallic 2D transition-metal dichalcogenides (2D-TMDs). Herein, by means of in situ microscopy and spectroscopic techniques, including scanning tunneling microscopy/spectroscopy, synchrotron X-ray and angle-resolved photoemission, and X-ray absorption, direct spectroscopic signatures are established, that identify the metallic 1T-phase and vanadium 3d electronic configuration in monolayer VSe grown on graphite by molecular-beam epitaxy. Element-specific X-ray magnetic circular dichroism, complemented with magnetic susceptibility measurements, further reveals monolayer VSe as a frustrated magnet, with its spins exhibiting subtle correlations, albeit in the absence of a long-range magnetic order down to 2 K and up to a 7 T magnetic field. Read More

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http://dx.doi.org/10.1002/adma.201901185DOI Listing
April 2019
1 Read
17.493 Impact Factor

A Liquid-Metal-Elastomer Nanocomposite for Stretchable Dielectric Materials.

Adv Mater 2019 Apr 18:e1900663. Epub 2019 Apr 18.

Integrated Soft Materials Lab, Carnegie Mellon University, Mechanical Engineering, Carnegie Mellon University, Robotics Institute, Carnegie Mellon University, Material Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.

Stretchable high-dielectric-constant materials are crucial for electronic applications in emerging domains such as wearable computing and soft robotics. While previous efforts have shown promising materials architectures in the form of dielectric nano-/microinclusions embedded in stretchable matrices, the limited mechanical compliance of these materials significantly limits their practical application as soft energy-harvesting/storage transducers and actuators. Here, a class of liquid metal (LM)-elastomer nanocomposites is presented with elastic and dielectric properties that make them uniquely suited for applications in soft-matter engineering. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019006
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April 2019
3 Reads

Multiphotoluminescence from a Triphenylamine Derivative and Its Application in White Organic Light-Emitting Diodes Based on a Single Emissive Layer.

Adv Mater 2019 Apr 16:e1900613. Epub 2019 Apr 16.

Department of Material Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China.

White organic light-emitting diode (WOLED) technology has attracted considerable attention because of its potential use as a next-generation solid-state lighting source. However, most of the reported WOLEDs that employ the combination of multi-emissive materials to generate white emission may suffer from color instability, high material cost, and a complex fabrication procedure which can be diminished by the single-emitter-based WOLED. Herein, a color-tunable material, tris(4-(phenylethynyl)phenyl)amine (TPEPA), is reported, whose photoluminescence (PL) spectrum is altered by adjusting the thermal annealing temperature nearly encompassing the entire visible spectra. Read More

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http://dx.doi.org/10.1002/adma.201900613DOI Listing

Artificial Microbial Arenas: Materials for Observing and Manipulating Microbial Consortia.

Adv Mater 2019 Apr 16:e1900284. Epub 2019 Apr 16.

Microverse Cluster, Friedrich Schiller University Jena, Neugasse 23, 07743, Jena, Germany.

From the smallest ecological niche to global scale, communities of microbial life present a major factor in system regulation and stability. As long as laboratory studies remain restricted to single or few species assemblies, however, very little is known about the interaction patterns and exogenous factors controlling the dynamics of natural microbial communities. In combination with microfluidic technologies, progress in the manufacture of functional and stimuli-responsive materials makes artificial microbial arenas accessible. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019002
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http://dx.doi.org/10.1002/adma.201900284DOI Listing
April 2019
2 Reads

Anion-Modulated HER and OER Activities of 3D Ni-V-Based Interstitial Compound Heterojunctions for High-Efficiency and Stable Overall Water Splitting.

Adv Mater 2019 Apr 16:e1901174. Epub 2019 Apr 16.

Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, P. R. China.

Overall water splitting driven by a low voltage is crucial for practical H evolution, but it is challenging. Herein, anion-modulation of 3D Ni-V-based transition metal interstitial compound (TMIC) heterojunctions supported on nickel foam (Ni N-VN/NF and Ni P-VP /NF) as coupled hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysts for efficient overall water splitting is demonstrated. The heterointerface in Ni N-VN has a suitable H* absorption energy, being favorable for enhancing HER activity with onset overpotential (η ) of zero and Tafel slope of 37 mV dec in 1 m KOH (close to that of Pt/C/NF). Read More

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http://dx.doi.org/10.1002/adma.201901174DOI Listing

Improved Epitaxy of AlN Film for Deep-Ultraviolet Light-Emitting Diodes Enabled by Graphene.

Adv Mater 2019 Apr 16:e1807345. Epub 2019 Apr 16.

Center for Nanochemistry (CNC), Beijing Science and Engineering Center for Nanocarbons, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.

The growth of single-crystal III-nitride films with a low stress and dislocation density is crucial for the semiconductor industry. In particular, AlN-derived deep-ultraviolet light-emitting diodes (DUV-LEDs) have important applications in microelectronic technologies and environmental sciences but are still limited by large lattice and thermal mismatches between the epilayer and substrate. Here, the quasi-van der Waals epitaxial (QvdWE) growth of high-quality AlN films on graphene/sapphire substrates is reported and their application in high-performance DUV-LEDs is demonstrated. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2018073
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http://dx.doi.org/10.1002/adma.201807345DOI Listing
April 2019
1 Read

Direct Writing of a 90 wt% Particle Loading Nanothermite.

Adv Mater 2019 Apr 16:e1806575. Epub 2019 Apr 16.

Department of Chemical and Environmental Engineering, The University of California, Riverside, CA, 92521, USA.

The additive manufacturing of energetic materials has received worldwide attention. Here, an ink formulation is developed with only 10 wt% of polymers, which can bind a 90 wt% nanothermite using a simple direct-writing approach. The key additive in the ink is a hybrid polymer of poly(vinylidene fluoride) (PVDF) and hydroxy propyl methyl cellulose (HPMC) in which the former serves as an energetic initiator and a binder, and the latter is a thickening agent and the other binder, which can form a gel. Read More

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http://dx.doi.org/10.1002/adma.201806575DOI Listing

A High-Performance Self-Regenerating Solar Evaporator for Continuous Water Desalination.

Adv Mater 2019 Apr 16:e1900498. Epub 2019 Apr 16.

Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.

Emerging solar desalination by interfacial evaporation shows great potential in response to global water scarcity because of its high solar-to-vapor efficiency, low environmental impact, and off-grid capability. However, solute accumulation at the heating interface has severely impacted the performance and long-term stability of current solar evaporation systems. Here, a self-regenerating solar evaporator featuring excellent antifouling properties using a rationally designed artificial channel-array in a natural wood substrate is reported. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019004
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http://dx.doi.org/10.1002/adma.201900498DOI Listing
April 2019
2 Reads

Artificial Neuron and Synapse Realized in an Antiferromagnet/Ferromagnet Heterostructure Using Dynamics of Spin-Orbit Torque Switching.

Adv Mater 2019 Apr 16:e1900636. Epub 2019 Apr 16.

Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.

Efficient information processing in the human brain is achieved by dynamics of neurons and synapses, motivating effective implementation of artificial spiking neural networks. Here, the dynamics of spin-orbit torque switching in antiferromagnet/ferromagnet heterostructures is studied to show the capability of the material system to form artificial neurons and synapses for asynchronous spiking neural networks. The magnetization switching, driven by a single current pulse or trains of pulses, is examined as a function of the pulse width (1 s to 1 ns), amplitude, number, and pulse-to-pulse interval. Read More

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http://dx.doi.org/10.1002/adma.201900636DOI Listing

Giant Barocaloric Effect at the Spin Crossover Transition of a Molecular Crystal.

Adv Mater 2019 Apr 15:e1807334. Epub 2019 Apr 15.

Department of Physics, Brooklyn College, CUNY, 2900 Bedford Avenue, Brooklyn, NY, 11210, USA.

The first experimental evidence for a giant, conventional barocaloric effect (BCE) associated with a pressure-driven spin crossover transition near room temperature is provided. Magnetometry, neutron scattering, and calorimetry are used to explore the pressure dependence of the SCO phase transition in polycrystalline samples of protonated and partially deuterated [FeL ][BF ] [L = 2,6-di(pyrazol-1-yl)pyridine] at applied pressures of up to 120 MPa (1200 bar). The data indicate that, for a pressure change of only 0-300 bar (0-30 MPa), an adiabatic temperature change of 3 K is observed at 262 K or 257 K in the protonated and deuterated materials, respectively. Read More

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http://dx.doi.org/10.1002/adma.201807334DOI Listing
April 2019
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Superelastic Hard Carbon Nanofiber Aerogels.

Adv Mater 2019 Apr 15:e1900651. Epub 2019 Apr 15.

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.

Superelastic carbon aerogels have been widely explored by graphitic carbons and soft carbons. These soft aerogels usually have delicate microstructures with good fatigue resistance but ultralow strength. Hard carbon aerogels show great advantages in mechanical strength and structural stability due to the sp -C-induced turbostratic "house-of-cards" structure. Read More

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http://dx.doi.org/10.1002/adma.201900651DOI Listing
April 2019
26 Reads

A Colorimetric Multifunctional Sensing Method for Structural-Durability-Health Monitoring Systems.

Adv Mater 2019 Apr 15:e1807552. Epub 2019 Apr 15.

School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, 440-745, Republic of Korea.

A colorimetric multifunctional phototransmittance-based structural durability monitoring system is developed. The system consists of an array with four indium gallium zinc oxide (IGZO)-based phototransistors, a light source at a wavelength of 405 nm through a side-emitting optical fiber, and pH- and Cl-selective color-variable membranes. Under illumination at the wavelength of 405 nm at corrosion status, the pH- and Cl-responsive membrane, showing a change in their color, generates a change in the intensity of the transmitted light, which is received by the phototransistor array in the form of an electrical current. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2018075
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http://dx.doi.org/10.1002/adma.201807552DOI Listing
April 2019
2 Reads

A Highly Efficient Self-Healing Elastomer with Unprecedented Mechanical Properties.

Adv Mater 2019 Apr 12:e1901402. Epub 2019 Apr 12.

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China.

It is highly desirable, although very challenging, to develop self-healable materials exhibiting both high efficiency in self-healing and excellent mechanical properties at ambient conditions. Herein, a novel Cu(II)-dimethylglyoxime-urethane-complex-based polyurethane elastomer (Cu-DOU-CPU) with synergetic triple dynamic bonds is developed. Cu-DOU-CPU demonstrates the highest reported mechanical performance for self-healing elastomers at room temperature, with a tensile strength and toughness up to 14. Read More

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http://dx.doi.org/10.1002/adma.201901402DOI Listing
April 2019
26 Reads

A New Architecture for Fibrous Organic Transistors Based on a Double-Stranded Assembly of Electrode Microfibers for Electronic Textile Applications.

Adv Mater 2019 Apr 12:e1900564. Epub 2019 Apr 12.

Center for Opto-Electronic Materials and Devices, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.

Herein, a unique device architecture is proposed for fibrous organic transistors based on a double-stranded assembly of electrode microfibers for electronic textile applications. A key feature of this work is that the semiconductor channel of the fiber transistor comprises a twist assembly of the source and drain electrode microfibers that are coated by an organic semiconductor. This architecture not only allows the channel dimension of the device to be readily controlled by varying the thickness of the semiconductor layer and the twisted length of the two electrode microfibers, but also passivates the device without affecting interconnections with other electrical components. Read More

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http://dx.doi.org/10.1002/adma.201900564DOI Listing

Ultrasmall Oxygen-Deficient Bimetallic Oxide MnWO Nanoparticles for Depletion of Endogenous GSH and Enhanced Sonodynamic Cancer Therapy.

Adv Mater 2019 Apr 12:e1900730. Epub 2019 Apr 12.

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, China.

Sonodynamic therapy (SDT) triggered by ultrasound (US) has attracted increasing attention owing to its abilities to overcome critical limitations including low tissue-penetration depth and phototoxicity in photodynamic therapy. Herein, the design of a new type of sonosensitizer is revealed, namely, ultrasmall oxygen-deficient bimetallic oxide MnWO nanoparticles, for multimodal imaging-guided enhanced SDT against cancer. As-made MnWO nanoparticles with poly(ethylene glycol) (PEG) modification show high physiological stability and biocompatibility. Read More

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http://dx.doi.org/10.1002/adma.201900730DOI Listing
April 2019
1 Read

Scalable Polymer Nanocomposites with Record High-Temperature Capacitive Performance Enabled by Rationally Designed Nanostructured Inorganic Fillers.

Adv Mater 2019 Apr 12:e1900875. Epub 2019 Apr 12.

Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.

Next-generation microelectronics and electrical power systems call for high-energy-density dielectric polymeric materials that can operate efficiently under elevated temperatures. However, the currently available polymer dielectrics are limited to relatively low working temperatures. Here, the solution-processable polymer nanocomposites consisting of readily prepared Al O fillers with systematically varied morphologies including nanoparticles, nanowires, and nanoplates are reported. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019008
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April 2019
11 Reads

Precise Self-Assembly of Nanoparticles into Ordered Nanoarchitectures Directed by Tobacco Mosaic Virus Coat Protein.

Adv Mater 2019 Apr 12:e1901485. Epub 2019 Apr 12.

CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou, 215123, China.

Self-assembly guided by biological molecules is a promising approach for fabricating predesigned nanostructures. Protein is one such biomolecule possessing deterministic 3D crystal structure and peptide information, which acts as a good candidate for templating functional nanoparticles (fNPs). However, inadequate coordination efficacy during the establishment of interfacial interactions with fNPs makes it highly challenging to precisely fabricate designed nanostructures and functional materials. Read More

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http://dx.doi.org/10.1002/adma.201901485DOI Listing

In Operando Probing of Lithium-Ion Storage on Single-Layer Graphene.

Adv Mater 2019 Apr 11:e1808091. Epub 2019 Apr 11.

Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, i-ChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, 96 Jin Zhai Rd., Hefei, Anhui, 230026, P. R. China.

Despite high-surface area carbons, e.g., graphene-based materials, being investigated as anodes for lithium (Li)-ion batteries, the fundamental mechanism of Li-ion storage on such carbons is insufficiently understood. Read More

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http://dx.doi.org/10.1002/adma.201808091DOI Listing

In-Plane Anisotropic Properties of 1T'-MoS Layers.

Adv Mater 2019 Apr 10:e1807764. Epub 2019 Apr 10.

Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.

Crystal phases play a key role in determining the physicochemical properties of a material. To date, many phases of transition metal dichalcogenides have been discovered, such as octahedral (1T), distorted octahedral (1T'), and trigonal prismatic (2H) phases. Among these, the 1T' phase offers unique properties and advantages in various applications. Read More

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http://dx.doi.org/10.1002/adma.201807764DOI Listing

A Highly Stretchable Liquid Metal Polymer as Reversible Transitional Insulator and Conductor.

Adv Mater 2019 Apr 11:e1901337. Epub 2019 Apr 11.

Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, China.

Materials with a temperature-controlled reversible electrical transition between insulator and conductor are attracting huge attention due to their promising applications in many fields. However, most of them are intrinsically rigid and require complicated fabrication processes. Here, a highly stretchable (680% strain) liquid metal polymer composite as a reversible transitional insulator and conductor (TIC), which is accompanied with huge resistivity changes (more than 4 × 10 times) reversibly through a tuning temperature in a few seconds is introduced. Read More

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http://dx.doi.org/10.1002/adma.201901337DOI Listing
April 2019
17.493 Impact Factor

Ambient Fast Synthesis and Active Sites Deciphering of Hierarchical Foam-Like Trimetal-Organic Framework Nanostructures as a Platform for Highly Efficient Oxygen Evolution Electrocatalysis.

Adv Mater 2019 Apr 11:e1901139. Epub 2019 Apr 11.

Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.

Metal-organic frameworks (MOFs) have attracted tremendous interest due to their promising applications including electrocatalysis originating from their unique structural features. However, it remains a challenge to directly use MOFs for oxygen electrocatalysis because it is quite difficult to manipulate their dimension, composition, and morphology of the MOFs with abundant active sites. Here, a facile ambient temperature synthesis of unique NiCoFe-based trimetallic MOF nanostructures with foam-like architecture is reported, which exhibit extraordinary oxygen evolution reaction (OER) activity as directly used catalyst in alkaline condition. Read More

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http://dx.doi.org/10.1002/adma.201901139DOI Listing

Dual Interfacial Design for Efficient CsPbI Br Perovskite Solar Cells with Improved Photostability.

Adv Mater 2019 Apr 11:e1901152. Epub 2019 Apr 11.

Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China.

A synergic interface design is demonstrated for photostable inorganic mixed-halide perovskite solar cells (PVSCs) by applying an amino-functionalized polymer (PN4N) as cathode interlayer and a dopant-free hole-transporting polymer poly[5,5'-bis(2-butyloctyl)-(2,2'-bithiophene)-4,4'-dicarboxylate-alt-5,5'-2,2'-bithiophene] (PDCBT) as anode interlayer. First, the interfacial dipole formed at the cathode interface reduces the workfunction of SnO , while PDCBT with deeper-lying highest occupied molecular orbital (HOMO) level provides a better energy-level matching at the anode, leading to a significant enhancement in open-circuit voltage (V ) of the PVSCs. Second, the PN4N layer can also tune the surface wetting property to promote the growth of high-quality all-inorganic perovskite films with larger grain size and higher crystallinity. Read More

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http://dx.doi.org/10.1002/adma.201901152DOI Listing

Controlling Horizontal Dipole Orientation and Emission Spectrum of Ir Complexes by Chemical Design of Ancillary Ligands for Efficient Deep-Blue Organic Light-Emitting Diodes.

Adv Mater 2019 Apr 10:e1808102. Epub 2019 Apr 10.

Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, South Korea.

Deep-blue emitting Iridium (Ir) complexes with horizontally oriented emitting dipoles are newly designed and synthesized through engineering of the ancillary ligand, where 2',6'-difluoro-4-(trimethylsilyl)-2,3'-bipyridine (dfpysipy) is used as the main ligand. Introduction of a trimethylsilyl group at the pyridine and a nitrogen at the difluoropyrido group increases the bandgap of the emitter, resulting in deep-blue emission. Addition of a methyl group (mpic) to a picolinate (pic) ancillary ligand or replacement of an acetate structure of pic with a perfluoromethyl-triazole structure (fptz) increases the horizontal component of the emitting dipoles in sequence of mpic (86%) > fptz (77%) > pic (74%). Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2018081
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http://dx.doi.org/10.1002/adma.201808102DOI Listing
April 2019
2 Reads

Genetically Encoded, Functional Single-Strand RNA Origami: Anticoagulant.

Adv Mater 2019 Apr 10:e1808262. Epub 2019 Apr 10.

Department of Materials Science and Engineering, College of Engineering, North Carolina State University, Raleigh, NC, 27695, USA.

Nucleic acid aptamers selected for thrombin binding have been previously shown to possess anticoagulant activity; however, problems with rapid renal clearance and short circulation half-life have prevented translation to clinical usefulness. Here, a family of self-folding, functional RNA origami molecules bearing multiple thrombin-binding RNA aptamers and showing significantly improved anticoagulant activity is described. These constructs may overcome earlier problems preventing clinical use of nucleic acid anticoagulants. Read More

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April 2019
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Epitaxial Strain Control of Relaxor Ferroelectric Phase Evolution.

Adv Mater 2019 Apr 10:e1901060. Epub 2019 Apr 10.

Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, 94720, USA.

Understanding and ultimately controlling the large electromechanical effects in relaxor ferroelectrics requires intimate knowledge of how the local-polar order evolves under applied stimuli. Here, the biaxial-strain-induced evolution of and correlations between polar structures and properties in epitaxial films of the prototypical relaxor ferroelectric 0.68PbMg Nb O -0. Read More

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http://dx.doi.org/10.1002/adma.201901060DOI Listing

Dynamics of Antimonene-Graphene Van Der Waals Growth.

Adv Mater 2019 Apr 10:e1900569. Epub 2019 Apr 10.

Department of Engineering Physics, École Polytechnique de Montréal, C. P. 6079, Succursale Centre-Ville, Montréal, Québec, H3C 3A7, Canada.

Van der Waals (vdW) heterostructures have recently been introduced as versatile building blocks for a variety of novel nanoscale and quantum technologies. Harnessing the unique properties of these heterostructures requires a deep understanding of the involved interfacial interactions and a meticulous control of the growth of 2D materials on weakly interacting surfaces. Although several epitaxial vdW heterostructures have been achieved experimentally, the mechanisms governing their synthesis are still nebulous. Read More

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http://dx.doi.org/10.1002/adma.201900569DOI Listing

Self-Sacrificial Template-Directed Vapor-Phase Growth of MOF Assemblies and Surface Vulcanization for Efficient Water Splitting.

Adv Mater 2019 Apr 10:e1806672. Epub 2019 Apr 10.

College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, 430072, P. R. China.

Direct use of metal-organic frameworks (MOFs) with robust pore structures, large surface areas, and high density of coordinatively unsaturated metal sites as electrochemical active materials is highly desirable (rather than using as templates and/or precursors for high-temperature calcination), but this is practically hindered by the poor conductivity and low accessibility of active sites in the bulk form. Herein, a universal vapor-phase method is reported to grow well-aligned MOFs on conductive carbon cloth (CC) by using metal hydroxyl fluorides with diverse morphologies as self-sacrificial templates. Specifically, by further partially on-site generating active Co S species from Co ions in the echinops-like Co-based MOF (EC-MOF) through a controlled vulcanization approach, the resulting Co S /EC-MOF hybrid exhibits much enhanced electrocatalytic performance toward the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with overpotentials of 84 and 226 mV required to reach a current density of 10 mA cm , respectively. Read More

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http://dx.doi.org/10.1002/adma.201806672DOI Listing

A Roadmap to Low-Cost Hydrogen with Hydroxide Exchange Membrane Electrolyzers.

Adv Mater 2019 Apr 10:e1805876. Epub 2019 Apr 10.

Department of Chemical and Biomolecular Engineering and Center for Catalytic Science and Technology, University of Delaware, 150 Academy Street, Newark, DE, 19716, USA.

Hydrogen is an ideal alternative energy carrier to generate power for all of society's energy demands including grid, industrial, and transportation sectors. Among the hydrogen production methods, water electrolysis is a promising method because of its zero greenhouse gas emission and its compatibility with all types of electricity sources. Alkaline electrolyzers (AELs) and proton exchange membrane electrolyzers (PEMELs) are currently used to produce hydrogen. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2018058
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April 2019
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Janus Graphene: Scalable Self-Assembly and Solution-Phase Orthogonal Functionalization.

Adv Mater 2019 Apr 10:e1900438. Epub 2019 Apr 10.

Department of Chemistry, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

Orthogonal functionalization of 2D materials by selective assembly at interfaces provides opportunities to create new materials with transformative properties. Challenges remain in realizing controllable, scalable surface-selective, and orthogonal functionalization. Herein, dynamic covalent assembly is reported that directs the functionalization of graphene surfaces at liquid-liquid interfaces. Read More

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http://dx.doi.org/10.1002/adma.201900438DOI Listing
April 2019
17.493 Impact Factor

Electrosynthesis of Hydrogen Peroxide Synergistically Catalyzed by Atomic Co-N -C Sites and Oxygen Functional Groups in Noble-Metal-Free Electrocatalysts.

Adv Mater 2019 Apr 10:e1808173. Epub 2019 Apr 10.

Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.

Hydrogen peroxide (H O ) is a green oxidizer widely involved in a vast number of chemical reactions. Electrochemical reduction of oxygen to H O constitutes an environmentally friendly synthetic route. However, the oxygen reduction reaction (ORR) is kinetically sluggish and undesired water serves as the main product on most electrocatalysts. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2018081
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April 2019
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Engineering an Artificial T-Cell Stimulating Matrix for Immunotherapy.

Adv Mater 2019 Apr 10:e1807359. Epub 2019 Apr 10.

Institute for Cell Engineering, School of Medicine, Baltimore, MD, 21205, USA.

T cell therapies require the removal and culture of T cells ex vivo to expand several thousand-fold. However, these cells often lose the phenotype and cytotoxic functionality for mediating effective therapeutic responses. The extracellular matrix (ECM) has been used to preserve and augment cell phenotype; however, it has not been applied to cellular immunotherapies. Read More

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Lattice Softening Significantly Reduces Thermal Conductivity and Leads to High Thermoelectric Efficiency.

Adv Mater 2019 Apr 10:e1900108. Epub 2019 Apr 10.

Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.

The influence of micro/nanostructure on thermal conductivity is a topic of great scientific interest, particularly to thermoelectrics. The current understanding is that structural defects decrease thermal conductivity through phonon scattering where the phonon dispersion and speed of sound are assumed to remain constant. Experimental work on a PbTe model system is presented, which shows that the speed of sound linearly decreases with increased internal strain. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019001
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http://dx.doi.org/10.1002/adma.201900108DOI Listing
April 2019
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Polymers with Side Chain Porosity for Ultrapermeable and Plasticization Resistant Materials for Gas Separations.

Adv Mater 2019 Apr 9:e1807871. Epub 2019 Apr 9.

Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

Polymer membranes with ultrahigh CO permeabilities and high selectivities are needed to address some of the critical separation challenges related to energy and the environment, especially in natural gas purification and postcombustion carbon capture. However, very few solution-processable, linear polymers are known today that access these types of characteristics, and all of the known structures achieve their separation performance through the design of rigid backbone chemistries that concomitantly increase chain stiffness and interchain spacing, thereby resulting in ultramicroporosity in solid-state chain-entangled films. Herein, the separation performance of a porous polymer obtained via ring-opening metathesis polymerization is reported, which possesses a flexible backbone with rigid, fluorinated side chains. Read More

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Microthrombus-Targeting Micelles for Neurovascular Remodeling and Enhanced Microcirculatory Perfusion in Acute Ischemic Stroke.

Adv Mater 2019 Apr 8:e1808361. Epub 2019 Apr 8.

Key Laboratory of Smart Drug Delivery, Ministry of Education, State Key Laboratory of Medical Neurobiology, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai, 201203, China.

Reperfusion injury exists as the major obstacle to full recovery of neuron functions after ischemic stroke onset and clinical thrombolytic therapies. Complex cellular cascades including oxidative stress, neuroinflammation, and brain vascular impairment occur within neurovascular units, leading to microthrombus formation and ultimate neuron death. In this work, a multitarget micelle system is developed to simultaneously modulate various cell types involved in these events. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2018083
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April 2019
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Pressure-Responsive Hierarchical Chiral Photonic Aerogels.

Adv Mater 2019 Apr 8:e1808186. Epub 2019 Apr 8.

Stewart Blusson Quantum Matter Institute, 2355 East Mall, Vancouver, British Columbia, V6T 1Z4, Canada.

Pressure-responsive chiral photonic aerogels are fabricated by combining liquid crystal self-assembly and ice-templating processes. The aerogels have a hierarchical structure in which the primary 2D chiral nematic structured walls of cellulose nanocrystals form ribbons that support a secondary 3D cellular network. Owing to the flexibility of the aerogels in solvent, the 3D structure of the aerogel can easily be transformed to a 2D structure by pressure-induced rearrangement. Read More

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April 2019
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2D Electron Gas and Oxygen Vacancy Induced High Oxygen Evolution Performances for Advanced Co O /CeO Nanohybrids.

Adv Mater 2019 Apr 8:e1900062. Epub 2019 Apr 8.

Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China.

The rational design of atomic-scale interfaces in multiphase nanohybrids is an alluring and challenging approach to develop advanced electrocatalysts. Herein, through the selection of two different metal oxides with particular intrinsic features, advanced Co O /CeO nanohybrids (NHs) with CeO nanocubes anchored on Co O nanosheets are developed, which show not only high oxygen vacancy concentration but also remarkable 2D electron gas (2DEG) behavior with ≈0.79 ± 0. Read More

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http://dx.doi.org/10.1002/adma.201900062DOI Listing
April 2019
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17.493 Impact Factor

Spatiotemporal Information Processing Emulated by Multiterminal Neuro-Transistor Networks.

Adv Mater 2019 Apr 8:e1900903. Epub 2019 Apr 8.

School of Electronic Science & Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.

All external sensory stimuli produce a spatiotemporal pattern of action potentials, which is transmitted to the biological neural system to be processed. The relative timing of synaptic spikes from different presynaptic neurons represents the features of the stimuli. A fundamental prerequisite in cortical information processing is the discrimination of different spatiotemporal input sequences. Read More

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http://dx.doi.org/10.1002/adma.201900903DOI Listing
April 2019
17.493 Impact Factor

Emerging Trends in Information-Driven Engineering of Complex Biological Systems.

Adv Mater 2019 Apr 8:e1806898. Epub 2019 Apr 8.

Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.

Synthetic biological systems are used for a myriad of applications, including tissue engineered constructs for in vivo use and microengineered devices for in vitro testing. Recent advances in engineering complex biological systems have been fueled by opportunities arising from the combination of bioinspired materials with biological and computational tools. Driven by the availability of large datasets in the "omics" era of biology, the design of the next generation of tissue equivalents will have to integrate information from single-cell behavior to whole organ architecture. Read More

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http://dx.doi.org/10.1002/adma.201806898DOI Listing

Interfacial Electronic Structure Modulation of NiTe Nanoarrays with NiS Nanodots Facilitates Electrocatalytic Oxygen Evolution.

Adv Mater 2019 Apr 8:e1900430. Epub 2019 Apr 8.

MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China.

Interface engineering has been recognized as one of the most promising strategies for regulating the physical and chemical properties of materials. However, constructing well-defined nanointerfaces with efficient oxygen evolution reaction (OER) still remains a challenge. Herein, cross columnar NiTe nanoarrays supported on nickel foam are prepared. Read More

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http://dx.doi.org/10.1002/adma.201900430DOI Listing

Limitations and Perspectives on Triplet-Material-Based Organic Photovoltaic Devices.

Adv Mater 2019 Apr 8:e1900690. Epub 2019 Apr 8.

Department of Physics, Chemistry and Biology, Linköping University, Linköping, SE-581 83, Sweden.

Organic photovoltaic cells (OPVs) have attracted broad attention and become a very energetic field after the emergence of nonfullerene acceptors. Long-lifetime triplet excitons are expected to be good candidates for efficiently harvesting a photocurrent. Parallel with the development of OPVs based on singlet materials (S-OPVs), the potential of triplet materials as photoactive layers has been explored. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019006
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April 2019
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A Rationally Designed Semiconducting Polymer Brush for NIR-II Imaging-Guided Light-Triggered Remote Control of CRISPR/Cas9 Genome Editing.

Adv Mater 2019 Apr 8:e1901187. Epub 2019 Apr 8.

Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD, 20892, USA.

The clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 9 (Cas9) genome-editing system has shown great potential in biomedical applications. Although physical approaches, viruses, and some nonviral vectors have been employed for CRISPR/Cas9 delivery and induce some promising genome-editing efficacy, precise genome editing remains challenging and has not been reported yet. Herein, second near-infrared window (NIR-II) imaging-guided NIR-light-triggered remote control of the CRISPR/Cas9 genome-editing strategy is reported based on a rationally designed semiconducting polymer brush (SPPF). Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.2019011
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http://dx.doi.org/10.1002/adma.201901187DOI Listing
April 2019
5 Reads

Giant Enhancements of Perpendicular Magnetic Anisotropy and Spin-Orbit Torque by a MoS Layer.

Adv Mater 2019 Apr 8:e1900776. Epub 2019 Apr 8.

Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore.

2D transition metal dichalcogenides have attracted much attention in the field of spintronics due to their rich spin-dependent properties. The promise of highly compact and low-energy-consumption spin-orbit torque (SOT) devices motivates the search for structures and materials that can satisfy the requirements of giant perpendicular magnetic anisotropy (PMA) and large SOT simultaneously in SOT-based magnetic memory. Here, it is demonstrated that PMA and SOT in a heavy metal/transition metal ferromagnet structure, Pt/[Co/Ni] , can be greatly enhanced by introducing a molybdenum disulfide (MoS ) underlayer. Read More

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