Fei Qu、Nian Bing Li、Hong Qun Luo2012-11-08Analytical Chemistry
Ag nanoclusters functioned by hyperbranched polyethyleneimine have been developed as a new fluorescent and colorimetric platform for sensitive and selective recognition of halide ions (e.g., Cl(-), Br(-), and I(-)). The recognition mechanism is based on the unique reactions between halide ions and the silver atoms. In…
Nanocluster Synthesis and ApplicationsMolecular Sensors and Ion DetectionAdvanced Nanomaterials in Catalysis
Thomas Speck、Alex Malins、C. Patrick Royall2012-11-08Physical Review Letters
Recently, numerical evidence for a dynamical first-order phase transition in trajectory space [L.O. Hedges et al., Science 323, 1309 (2009)] has been found. In a model glass former in which clusters of 11 particles form upon cooling, we find that the transition has both dynamical and structural character. It occurs be…
Theoretical and Computational PhysicsMaterial Dynamics and PropertiesPlant and animal studies
Hirofumi Sakakibara、Katsuhiro Suzuki、Hidetomo Usui 等 7 位作者2012-11-08arXiv
High-temperature cuprate superconductors have been known to exhibit significant pressure effects. In order to fathom the origin of why and how Tc is affected by pressure, we have recently studied the pressure effects on Tc adoptig a model that contains two cupper d-orbitals derived from first-principles band calculati…
SuperconductivityStrongly Correlated ElectronsMaterials Science
D. Pinna、A. D. Kent、D. L. Stein2012-11-08arXiv
We consider the general Landau-Lifshitz-Gilbert (LLG) dynamical theory underlying the magnetization switching rates of a thin film uniaxial magnet subject to spin-torque effects and thermal fluctuations (thermal noise). After discussing the various dynamical regimes governing the switching phenomena, we present analyt…
Materials ScienceMesoscale and Nanoscale Physics
Andrea Scaramucci、Éric Bousquet、M. Fechner 等 5 位作者2012-11-08Physical Review Letters
We use symmetry analysis and first-principles calculations to show that the linear magnetoelectric effect can originate from the response of orbital magnetic moments to the polar distortions induced by an applied electric field. Using LiFePO(4) as a model compound we show that spin-orbit coupling partially lifts the q…
Advanced Condensed Matter PhysicsMagnetic and transport properties of perovskites and related materialsMultiferroics and related materials
E. H. Hwang、S. Das Sarma2012-11-08arXiv
We investigate theoretically 2D electronic transport in Si:P $δ$-doped layers limited by charged-dopant scattering. Since the carrier density is approximately equal to the dopant impurity density, the density dependent transport shows qualitatively different behavior from that of the well-studied 2D Si-MOSFETs where t…
Materials ScienceMesoscale and Nanoscale Physics
Mikael Råsander、Lars Bergqvist、Anna Delin2012-11-08arXiv
We have investigated the electronic structure of fluorite Cu$_{2}$Se using density functional theory calculations within the LDA, PBE and AM05 approximations as well as with the non-local hybrid PBE0 and HSE approximations. Our results show that Cu$_{2}$Se is a zero gap semiconductor when using either a local or semi-…
Materials Science
Wenxu Zhang、Zhida Song、Bin Peng 等 4 位作者2012-11-08arXiv
Electronic structures of carbides with the rocksalt structure were calculated by full potential electronic codes solving the Kohn-Sham equation. Bonding characters were analyzed by constructing tight-binding Hamiltonian based on maximally-localized Wannier functions. It was found that the cations in these compounds ac…
Materials Science
Ruimin Qiao、Timothy Chin、Stephen J. Harris 等 5 位作者2012-11-08arXiv
We performed a systematic study of soft X-ray absorption spectroscopy in various manganese oxides and fluorides. Both Mn L-edges and ligand (O and F) K-edges are presented and compared with each other. Despite the distinct crystal structure and covalent/ionic nature in different systems, the Mn-L spectra fingerprint t…
Materials Science
Yang Zhu、Zhengwei Mao、Changyou Gao2012-11-08RSC Advances
The ester-containing polymers, in particular polyesters, are widely used as biomedical materials due to their industrial availability and, in many cases, degradability. However, the commercially available polyesters are usually absent of bioactive sites or motifs to meet the requirements of some specific biomedical us…
biodegradable polymer synthesis and propertiesPolymer Surface Interaction StudiesElectrospun Nanofibers in Biomedical Applications
Renzhi Ma、Jianbo Liang、Xiaohe Liu 等 4 位作者2012-11-08Journal of the American Chemical Society
The topochemical transformation from transition-metal brucite hydroxide (Co(1-x)Fe(x)(OH)(2), Co(OH)(2), Co(1-x)Ni(x)(OH)(2)) to corresponding (Co(2+)-(Co(3+))-Fe(3+), Co(2+)-(Ni(2+))-Co(3+)) LDH under oxidizing halogen agents (iodine, bromine) exhibits different staging phenomena depending on the metallic composition…
Layered Double Hydroxides Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsMagnesium Oxide Properties and Applications
Kohei Kanetani、K. Sugawara、T. Sato 等 7 位作者2012-11-08Proceedings of the National Academy of Sciences
Success in isolating a 2D graphene sheet from bulky graphite has triggered intensive studies of its physical properties as well as its application in devices. Graphite intercalation compounds (GICs) have provided a platform of exotic quantum phenomena such as superconductivity, but it is unclear whether such intercala…
2D Materials and ApplicationsAdvancements in Battery MaterialsGraphene research and applications
Noora Naghavi、Achala de Mel、Omid S. Alavijeh 等 5 位作者2012-11-08Small
In an era of increased cardiovascular disease burden in the ageing population, there is great demand for devices that come in to contact with the blood such as heart valves, stents, and bypass grafts that offer life saving treatments. Nitric oxide (NO) elution from healthy endothelial tissue that lines the vessels mai…
Polymer Surface Interaction StudiesElectrospun Nanofibers in Biomedical ApplicationsBone Tissue Engineering Materials
Lili Jiang、Tianzhong Yang、Liu Fei 等 10 位作者2012-11-08Advanced Materials
Large-scale, uniform, vertically standing graphene with atomically thin edges are controllably synthesized on copper foil using a microwave-plasma chemical vapor deposition system. A growth mechanism for this system is proposed. This film shows excellent field-emission properties, with low turn-on field of 1.3 V μm(-1…
Diamond and Carbon-based Materials ResearchMolecular Junctions and NanostructuresGraphene research and applications
Zhuhua Zhang、Xiaofei Liu、Boris I. Yakobson 等 4 位作者2012-11-08Journal of the American Chemical Society
We report a two-dimensional tetragonal Titanium Carbide (TiC) monolayer sheet with distinguished structure and properties based on comprehensive first-principles calculations. The TiC sheet exhibits a novel zigzag-shaped buckling structure with all atoms being quasiplanar tetracoordinate, as favored by strong in-plane…
Graphene research and applicationsMXene and MAX Phase Materials2D Materials and Applications
Jiayang Li、Yi Kuang、Yuan Gao 等 6 位作者2012-11-08OpenAlex
As systemically used therapeutics for treating acute or chronic pains or inflammations, nonsteroidal anti-inflammatory drugs (NSAIDs) also associate with the adverse gastrointestinal and renal effects and cardiovascular risks. Thus, it is beneficial to develop topical gels that selectively inhibit cyclooxygenase-2 (CO…
Supramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applicationsAntimicrobial Peptides and Activities
Xin Zhou、H. Kay Chung、Amy Lam 等 4 位作者2012-11-08OpenAlex
Fluorescent proteins (FPs) are widely used as optical sensors, whereas other light-absorbing domains have been used for optical control of protein localization or activity. Here, we describe light-dependent dissociation and association in a mutant of the photochromic FP Dronpa, and we used it to control protein activi…
Light effects on plantsPhotoreceptor and optogenetics researchPhotochromic and Fluorescence Chemistry
Patricia de la Presa、Yurena Luengo、M. Multigner 等 7 位作者2012-11-08OpenAlex
The specific absorption rate (SAR) of γ-Fe 2 O 3 nanoparticles (NPs) under an alternating magnetic field has been investigated as a function of size, concentration, coating, liquid carrier, and frequency and amplitude of the applied magnetic field. The NPs have been synthesized by coprecipitation method with sizes ran…
Nanoparticle-Based Drug DeliveryIron oxide chemistry and applicationsElectrostatics and Colloid Interactions
Christopher M. Bates、Takehiro Seshimo、Michael J. Maher 等 9 位作者2012-11-08OpenAlex
Block copolymers (BCPs) must necessarily have high interaction parameters (χ), a fundamental measure of block incompatibility, to self-assemble into sub-10-nanometer features. Unfortunately, a high χ often results from blocks that have disparate interfacial energies, which makes the formation of useful thin-film domai…
Machine Learning in Materials ScienceBlock Copolymer Self-AssemblyAdvancements in Photolithography Techniques
I. Brihuega、P. Mallet、Héctor González‐Herrero 等 9 位作者2012-11-08arXiv
Extensive scanning tunneling microscopy and spectroscopy experiments complemented by first-principles and parametrized tight binding calculations provide a clear answer to the existence, origin, and robustness of van Hove singularities (vHs) in twisted graphene layers. Our results are conclusive: vHs due to interlayer…
Graphene research and applicationsTopological Materials and PhenomenaQuantum and electron transport phenomena