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Short-range correlations seen in the nematic phase of bent-core liquid crystals by dielectric and electro-optic studies

Yun Hee Jang、В. П. Панов、A. Kocot 等 6 位作者2011-12-19Physical Review E

Three bent-core nematic liquid crystals having the same core but with different terminal groups, short (C4) and long (C7,C9) tails, are investigated by dielectric and electro-optic contrast spectroscopic techniques. C4 shows sign reversal in the dielectric anisotropy $\ensuremath{\Delta}{\ensuremath{\epsilon}}^{\ensur…

Liquid Crystal Research AdvancementsPlant Reproductive BiologyMolecular spectroscopy and chirality

Chemically Detachable Polyelectrolyte Multilayer Platform for Cell Sheet Engineering

Armelle Chassepot、Longcheng Gao、Isabelle Nguyen 等 13 位作者2011-12-19Chemistry of Materials

Human gingival fibroblasts (HGFs) cell sheets have a potential use for in vivo wound healing due to the ability of HGFs to adopt a contractile phenotype which is typically expressed during extracellular matrix tissue remodeling. For this purpose, we developed a chemically detachable platform based on poly(allylamine h…

Electrospun Nanofibers in Biomedical ApplicationsPolymer Surface Interaction StudiesPeriodontal Regeneration and Treatments

Ln( iii )-cored complexes based on boron dipyrromethene (Bodipy) ligands for NIR emission

Jung Ho Ryu、Yu Kyung Eom、Jean‐Claude G. Bünzli 等 4 位作者2011-12-19New Journal of Chemistry

Two Bodipy-based chromophores have been synthesized, which bear two methoxyphenyl substituents in the 1,7 positions and either hydrogen (L1) or bromine (L2) atoms in the 2,6 positions, with the aim of testing their ability to sensitize the luminescence of near-infrared emitting LnIII ions. Despite the presence of the…

Molecular Sensors and Ion DetectionLuminescence and Fluorescent MaterialsLanthanide and Transition Metal Complexes

Electrically controlled metal–insulator transition process in VO2thin films

Yong Zhao、Hao Ji、Changhong Chen 等 4 位作者2011-12-19Journal of Physics Condensed Matter

We report the evolution process of VO(2) thin films from the insulating phase to the metallic phase under current injection for the two-electrode-based thin-film devices. Based on electrical characterization and Raman microscopic detection, it was found that there exist two critical current densities, based on which t…

Gas Sensing Nanomaterials and SensorsAdvanced Memory and Neural ComputingTransition Metal Oxide Nanomaterials

Structural variability within, and polymorphic stability of, nano-crystalline molecular clusters of l-glutamic acid and D-mannitol, modelled with respect to their size, shape and ‘crystallisability’

Robert B. Hammond、Klimentina Pencheva、Kevin J. Roberts2011-12-19CrystEngComm

The molecular and intermolecular structure and energetic stability of nano-sized molecular clusters for two polymorphic forms of L-glutamic acid (L-GA) and two of D-mannitol (D–M) are assessed. Molecular modelling, using empirical force-fields and the atom-atom method, is applied to examine the relative stability of b…

Crystallography and molecular interactionsEnzyme Structure and FunctionCrystallization and Solubility Studies

Influence of the modified Becke-Johnson exchange potential on thermoelectric properties: Application to Mg2Si

Pascal Boulet、Marie‐Christine Record2011-12-19The Journal of Chemical Physics

The electronic and transport properties of Mg(2)Si are calculated using the density-functional and semi-classical Boltzmann transport theories. A detailed comparison of the efficiency of the Perdew, Burke, and Ernzerhof (PBE) and the modified Becke-Johnson (m-BJ) exchange potentials on the prediction of these properti…

Advanced Thermoelectric Materials and DevicesHeusler alloys: electronic and magnetic propertiesSuperconductivity in MgB2 and Alloys

Physically Facilitating drug-delivery Systems

Jorge Rodriguez-Devora、Sunny Ambure、Zhi‐dong Shi 等 6 位作者2011-12-19Therapeutic Delivery

Facilitated/modulated drug-delivery systems have emerged as a possible solution for delivery of drugs of interest to pre-allocated sites at predetermined doses for predefined periods of time. Over the past decade, the use of different physical methods and mechanisms to mediate drug release and delivery has grown signi…

Nanoparticle-Based Drug Delivery3D Printing in Biomedical ResearchMicrofluidic and Bio-sensing Technologies

Symmetry and structure of multiferroic Ba2CoGe2O7

Vladimir Hutanu、Andrew Sazonov、H. Murakawa 等 6 位作者2011-12-19Physical Review B

Crystal structure of Ba${}_{2}$CoGe${}_{2}$O${}_{7}$ at room temperature (RT) and 90 K has been probed by single-crystal diffraction of x-ray synchrotron radiation. The space group (SG) found at both temperatures is well approximated by $P$-42${}_{1}m$, in agreement with expectation for melilite-like compounds. The re…

Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics

ELECTROMAGNETIC OPTIMAL DESIGN FOR DUAL-BAND RADOME WALL WITH ALTERNATING LAYERS OF STAGGERED COMPOSITE AND KAGOME LATTICE STRUCTURE

Yongmao Pei、Anmin Zeng、Licheng Zhou 等 5 位作者2011-12-19Electromagnetic waves

Abstract—In this paper, electromagnetic optimal design is carried out for dual-band radome wall with alternating layers of staggered composite and Kagome lattice structure. The novel wall structure provides broadband transmission capability, along with excellent thermal-elastic properties and mechanical performances f…

Metamaterials and Metasurfaces ApplicationsMicrowave Engineering and WaveguidesAdvanced Antenna and Metasurface Technologies

Effect of taurine and gold nanoparticles on the morphological and molecular characteristics of muscle development during chicken embryogenesis

Marlena Zielińska-Górska、Ewa Sawosz、Marta Grodzik 等 8 位作者2011-12-19Archives of Animal Nutrition

The objective of the present investigation was to evaluate the effects of taurine and Au nanoparticles on the expression of genes related to embryonic muscle development and on the morphological characteristics of muscles. Fertilised chicken eggs (n = 160) were randomly divided into four groups: without injection (Con…

Electrospun Nanofibers in Biomedical ApplicationsMuscle metabolism and nutritionAldose Reductase and Taurine

Multistep Crystallization Process Involving Sequential Formations of Density Fluctuations, “Intermediate Structures”, and Lamellar Crystallites: Poly(3-hydroxybutyrate) As Investigated by Time-Resolved Synchrotron SAXS and WAXD

Longhai Guo、Nicolás Spegazzini、Harumi Sato 等 8 位作者2011-12-19Macromolecules

We explored the isothermal crystallization process of poly(3-hydroxybutyrate) by means of simultaneous measurements of time-resolved wide-angle X-ray diffraction (tr-WAXD) and small-angle X-ray scattering (tr-SAXS) methods. The tr-WAXD analyses involve not only (1) a precise analysis of the integral widths but also th…

Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesMicroplastics and Plastic Pollution

Modification of Chitosan–Methylcellulose Composite Films with meso-Tetrakis(4-sulfonatophenyl)porphyrin

Alla Synytsya、Alla Synytsya、Michaela Grafová 等 7 位作者2011-12-19Biomacromolecules

Polysaccharide films containing chitosan, methylcellulose, and a mixture of these polysaccharides in various ratios were prepared and modified with meso-tetrakis(4-sulfonatophenyl)porphyrin in an aqueous medium at pH 7. The modified films were compared with the initial films using spectroscopic methods and microscopic…

Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesPolydiacetylene-based materials and applications

Chemogenomics of pyridoxal 5′-phosphate dependent enzymes

Ratna Singh、Francesca Spyrakis、Pietro Cozzini 等 6 位作者2011-12-19Journal of Enzyme Inhibition and Medicinal Chemistry

Pyridoxal 5'-phosphate (PLP) dependent enzymes comprise a large family that plays key roles in amino acid metabolism and are acquiring an increasing interest as drug targets. For the identification of compounds inhibiting PLP-dependent enzymes, a chemogenomics-based approach has been adopted in this work. Chemogenomic…

RNA and protein synthesis mechanismsGlycosylation and Glycoproteins ResearchEnzyme Structure and Function

Nematic phase without Heisenberg physics in FeAs planes

M. Capati、M. Grilli、J. Lorenzana2011-12-19Physical Review B

We use Monte Carlo simulations and analytical arguments to analyze a frustrated Ising model with nearest-neighbor antiferromagnetic coupling ${J}_{1}$ and next-nearest-neighbor coupling ${J}_{2}$. The model is inspired on the physics of pnictide superconductors and to some extent we argue that it can be more represent…

Physics of Superconductivity and MagnetismCorporate Taxation and AvoidanceIron-based superconductors research

Recognition of carbon nanotube chirality by phage display

Ting Yu、Yingxue Gong、Tingting Lu 等 8 位作者2011-12-19RSC Advances

We report a virus-based biological template, M13 bacteriophage, for selecting single-walled carbon nanotubes’ (SWCNTs’) chirality, based on the premise that binding affinity between carbon nanotubes (CNTs) and peptides are sensitive to amino acid sequences. Bacteriophage pIII capsid fusion peptides, which have high bi…

Advanced biosensing and bioanalysis techniquesMolecular Junctions and NanostructuresDiatoms and Algae Research

Highly sensitive surface-enhanced Raman scattering using vertically aligned silver nanopetals

Liang Su、Wenzhao Jia、Daniel P. Manuzzi 等 7 位作者2011-12-19RSC Advances

Surface-enhanced Raman scattering (SERS) has attracted great attention due to its high sensitivity and specificity in the detection of a variety of molecules. Recently, much effort has been focused on the development of novel nanostructured SERS substrate with reliable and excellent sensing performance. In this work,…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNanocluster Synthesis and Applications

Plasma Treated Multi-Walled Carbon Nanotubes (MWCNTs) for Epoxy Nanocomposites

Andrew C. Ritts、Qingsong Yu、Hao Li 等 7 位作者2011-12-19Polymers

Plasma nanocoating of allylamine were deposited on the surfaces of multi-walled carbon nanotubes (MWCNTs) to provide desirable functionalities and thus to tailor the surface characteristics of MWCNTs for improved dispersion and interfacial adhesion in epoxy matrices. Plasma nanocoated MWCNTs were characterized using s…

Carbon Nanotubes in CompositesPolymer Nanocomposites and PropertiesPolymer Nanocomposite Synthesis and Irradiation

Charge carrier mobility and concentration as a function of composition in AgPO3–AgI glasses

Ana Cândida Martins Rodrigues、Márcio Luis Ferreira Nascimento、Caio Barca Bragatto 等 4 位作者2011-12-19The Journal of Chemical Physics

Conductivity data of the xAgI(1 - x)AgPO(3) system (0 ≤ x ≤ 0.5) were collected in the liquid and glassy states. The difference in the dependence of ionic conductivity on temperature below and above their glass transition temperatures (T(g)) is interpreted by a discontinuity in the charge carrier's mobility mechanisms…

Material Dynamics and PropertiesGlass properties and applicationsPhase-change materials and chalcogenides

Inhomogeneous fluids of colloidal hard dumbbells: Fundamental measure theory and Monte Carlo simulations

Matthieu Maréchal、Hanns Hagen Goetzke、Andreas Härtel 等 4 位作者2011-12-19The Journal of Chemical Physics

Recently, a density functional theory for hard particles with shape anisotropy was developed, the extended deconvolution fundamental measure theory (edFMT). We apply edFMT to hard dumbbells, arguably the simplest non-convex shape and readily available experimentally in the form of colloids. We obtain good agreement be…

Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesPickering emulsions and particle stabilization

A Cyano‐Bridged Vanadium–Niobium Bimetal Assembly Exhibiting a High Curie Temperature of 210 K

Kenta Imoto、Miho Takemura、Hiroko Tokoro 等 4 位作者2011-12-19European Journal of Inorganic Chemistry

Abstract We report a cyano‐bridged V–Nb bimetal assembly, K 0.59 V II 1.59 V III 0.41 [Nb IV (CN) 8 ] · (SO 4 ) 0.50 · 6.9H 2 O, exhibiting ferrimagnetism with a high Curie temperature ( T C ) of 210 K, which is the highest T C value among those of octacyano‐bridged bimetal assemblies. Such a high T C value originates…

Magnetism in coordination complexesOrganic and Molecular Conductors ResearchInorganic Chemistry and Materials