Jian Sun、Jie Zhang、Yongdong Jin2012-10-22Journal of Materials Chemistry C
We report a one-pot approach to prepare fluorescent gold nanoclusters (AuNCs) from HAuCl4 by simply using 11-mercaptoundecanoic acid (11-MUA) as a reducing and capping agent, in an aqueous solution of NaOH at room temperature. The as-prepared water-soluble AuNCs with average diameters of 1.8 ± 0.4 nm exhibit a unique…
Gold and Silver Nanoparticles Synthesis and ApplicationsCarbon and Quantum Dots ApplicationsNanocluster Synthesis and Applications
V. V. Sokolovskiy、V. D. Buchelnikov、М. А. Загребин 等 6 位作者2012-10-22Physical Review B
We present ab initio calculations of magnetic exchange parameters of stoichiometric Heusler compound Ni${}_{2}$MnSn and a few nonstoichiometric Ni${}_{2}$Mn${}_{1+x}$Sn${}_{1\ensuremath{-}x}$ cases. Use of the exchange parameters in subsequent Monte Carlo simulations allows us to evaluate the magnetization curves as a…
Shape Memory Alloy TransformationsMagnetic Properties and ApplicationsHeusler alloys: electronic and magnetic properties
Feng Peng、Maosheng Miao、Hui Wang 等 5 位作者2012-10-22Journal of the American Chemical Society
High pressure can fundamentally alter the bonding patterns of light elements and their compounds, leading to the unexpected formation of materials with unusual chemical and physical properties. Using an unbiased structure search method based on particle-swarm optimization algorithms in combination with density functio…
Boron and Carbon Nanomaterials ResearchMXene and MAX Phase MaterialsInorganic Chemistry and Materials
Kara Zabetakis、William Ghann、Sanjeev Kumar 等 4 位作者2012-10-22Gold bulletin
The Turkevich–Frens synthesis starting conditions are expanded, ranging the gold salt concentrations up to 2 mM and citrate/gold(III) molar ratios up to 18:1. For each concentration of the initial gold salt solution, the citrate/gold(III) molar ratios are systematically varied from 2:1 to 18:1 and both the size and si…
Nanoparticles: synthesis and applicationsGold and Silver Nanoparticles Synthesis and ApplicationsNanomaterials for catalytic reactions
Corina Etz、Marcio Costa、Olle Eriksson 等 4 位作者2012-10-22arXiv
In this work the magnetization dynamics of clusters supported on non-magnetic substrates is shown to exhibit an unprecedented complex response when subjected to external magnetic fields. The field-driven magnetization reversal of small Co clusters deposited on a Cu(111) surface has been studied by means of first-princ…
Mesoscale and Nanoscale PhysicsMaterials Science
Rossitza Pentcheva、Rémi Arras、Katrin Otte 等 5 位作者2012-10-22Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences
A wealth of intriguing properties emerge in the seemingly simple system composed of the band insulators LaAlO(3) and SrTiO(3) such as a two-dimensional electron gas, superconductivity and magnetism. In this paper, we review the current insight obtained from first principles calculations on the mechanisms governing the…
Semiconductor materials and devicesMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
Maryam Taherinejad、David Vanderbilt、Pavel Márton 等 5 位作者2012-10-22Physical Review B
Ferroelectric domain walls (FDWs) are usually considered to be of Ising type, but there have been suggestions in recent years that Bloch-type FDWs are also possible in some cases, e.g., in the rhombohedral phase of BaTiO${}_{3}$. The mechanically compatible and electrically neutral FDWs in rhombohedral BaTiO${}_{3}$ a…
Ferroelectric and Piezoelectric MaterialsPhotorefractive and Nonlinear OpticsAcoustic Wave Resonator Technologies
L. C. Campos、A. F. Young、K. Surakitbovorn 等 6 位作者2012-10-22arXiv
The advent of few-layer graphenes has given rise to a new family of two-dimensional systems with emergent electronic properties governed by relativistic quantum mechanics. The multiple carbon sublattices endow the electronic wavefunctions with pseudospin, a lattice analog of the relativistic electron spin, while the m…
Mesoscale and Nanoscale PhysicsMaterials Science
Sanjay Singh、K.R.A. Ziebeck、Emmanuelle Suard 等 7 位作者2012-10-22Applied Physics Letters
7M orthorhombic modulated structure in the martensite phase of Ni1.8Pt0.2MnGa is reported by powder neutron diffraction study, which indicates that it is likely to exhibit magnetic field induced strain. The change in the unit cell volume is less than 0.5% between the austenite and the martensite phases, as expected fo…
Magnetic and transport properties of perovskites and related materialsShape Memory Alloy TransformationsCreativity in Education and Neuroscience
A. M. Aliev、A. G. Gamzatov、K. I. Kamilov 等 5 位作者2012-10-22Applied Physics Letters
The effect of 16О → 18О isotope substitution on specific heat and magnetocaloric effect of polycrystalline La0.7Ca0.3MnO3 manganite is studied. Mainly the effect of isotope substitution for the specific heat and magnetocaloric effect is only the reduction of temperatures of anomalies. ΔTad values at magnetic field cha…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsThermal Expansion and Ionic Conductivity
Keiko Takase、Setsuhisa Tanabe、Satoshi Sasaki 等 5 位作者2012-10-22Physical Review B
We demonstrate experimentally that graphene quantum capacitance ${C}_{\mathrm{q}}$ can have a strong impact on transport spectroscopy through the interplay with nearby charge reservoirs. The effect is elucidated in a field-effect-gated epitaxial graphene device, in which interface states serve as charge reservoirs. Th…
Advancements in Battery MaterialsGraphene research and applicationsAdvanced Memory and Neural Computing
Akihito Kikuchi2012-10-22arXiv
It is necessary to employ quasi-particle calculations to correct band gap problems in LDA. As an expedient way for the reliable but massive GWA, Quasi-Particle-LDA (QPLDA) is proposed by several authors, where the total computational cost scales with N. Historically, Sham and Kohn introduced the idea of the local mass…
Materials Sciencephysics.comp-ph
Wenhong Wang、Enke Liu、Yin Du 等 8 位作者2012-10-22arXiv
We report on a systematic study of the structural, magnetic properties and the anomalous Hall effect, in the Heusler alloy Co2FeAl (CFA) epitaxial films on MgO(001), as a function of film thickness. It was found that the epitaxial CFA films show a highly ordered B2 structure with an in-plane uniaxial magnetic anisotro…
Materials Science
Yury Shchipunov2012-10-22Pure and Applied Chemistry
Bionanocomposites are a novel class of nanosized materials. They contain the constituent of biological origin and particles with at least one dimension in the range of 1–100 nm. There are similarities with nanocomposites but also fundamental differences in the methods of preparation, properties, functionalities, biode…
Bone Tissue Engineering MaterialsCalcium Carbonate Crystallization and InhibitionDiatoms and Algae Research
Vishwajeet M. Khot、Ashwini B. Salunkhe、Nanasaheb D. Thorat 等 5 位作者2012-10-22Dalton Transactions
MgFe(2)O(4) nanoparticles with sizes around 20 nm have been prepared by a combustion method and functionalized with dextran for their possible applications in magnetic particle hyperthermia. The induction heating study of these nanoparticles at different magnetic field amplitudes, from 6.7 kA m(-1) to 26.7 kA m(-1), s…
Nanoparticle-Based Drug DeliveryMagnetic Properties and Synthesis of FerritesCharacterization and Applications of Magnetic Nanoparticles
Hasan Şahin、S. Çiraci2012-10-22The Journal of Physical Chemistry C
We perform first-principles structure optimization, phonon frequency, and finite temperature molecular dynamics calculations based on density functional theory to study the interaction of chlorine atoms with graphene predicting the existence of possible chlorinated graphene derivatives. The bonding of a single chlorin…
Graphene research and applicationsEnvironmental remediation with nanomaterialsNanomaterials for catalytic reactions
J. Li、S. Majety、R. Dahal 等 6 位作者2012-10-22Applied Physics Letters
Hexagonal boron nitride (hBN) epilayers have been synthesized by metal organic chemical vapor deposition and their dielectric strength, optical absorption, and potential as a deep ultraviolet (DUV) detector material have been studied. Based on the graphene optical absorption concept, the estimated band-edge absorption…
Graphene research and applications2D Materials and ApplicationsGa2O3 and related materials
Dongyun Ma、Guoying Shi、Hongzhi Wang 等 5 位作者2012-10-22Journal of Materials Chemistry A
We have demonstrated that vertically aligned WO3 nanostructure films can be fabricated on FTO-coated glass substrates using a template-free hydrothermal technique. Detailed mechanistic studies revealed that a variety of WO3 nanostructures—including nano-bricks, 1D nanorods and nanowires, and 3D nanorod-flowers—could b…
Gas Sensing Nanomaterials and SensorsConducting polymers and applicationsTransition Metal Oxide Nanomaterials
Setu Kasera、Frank Biedermann、Jeremy J. Baumberg 等 5 位作者2012-10-22Nano Letters
We show how the macrocyclic host, cucurbit[8]uril (CB[8]), creates precise subnanometer junctions between gold nanoparticles while its cavity simultaneously traps small molecules; this enables their reproducible surface-enhanced Raman spectroscopy (SERS) detection. Explicit shifts in the SERS frequencies of CB[8] on c…
Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesNanocluster Synthesis and Applications
Fatma Kayacı、Çağla Özgit-Akgün、İnci Dönmez 等 5 位作者2012-10-22ACS Applied Materials & Interfaces
Polymer-inorganic core-shell nanofibers were produced by two-step approach; electrospinning and atomic layer deposition (ALD). First, nylon 6,6 (polymeric core) nanofibers were obtained by electrospinning, and then zinc oxide (ZnO) (inorganic shell) with precise thickness control was deposited onto electrospun nylon 6…
Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsElectrospun Nanofibers in Biomedical Applications