Hossein Tajik、Mehran Moradi、Seyed Mehdi Razavi Rohani 等 5 位作者2008-06-06Molecules
Chitosan (CS) was prepared from Artemia urmiana cyst shells using the same chemical process as described for the other crustacean species, with minor adjustments in the treatment conditions. The influence of modifications of the CS production process on the physiochemical and functional properties of the CS obtained w…
Nanocomposite Films for Food PackagingMicroencapsulation and Drying Processes
Francesca Cavalieri、Ester Chiessi、Raffaella Villa 等 7 位作者2008-06-06Biomacromolecules
Micro- and nanoparticles are considered suitable drug delivery systems for their unique features, such as a large surface to volume ratio, and for the possibility to tune their size and hydrophobicity. A polymer/polymer/water emulsion method was used for producing a chemically cross-linked hydrogel made of poly(vinyl…
Nanoparticle-Based Drug DeliveryHydrogels: synthesis, properties, applicationsGraphene and Nanomaterials Applications
Dawei Wang、Feng Li、Min Liu 等 5 位作者2008-06-06The Journal of Physical Chemistry C
The ion transport behavior in hexagonal ordered mesoporous carbon (OMC, two-dimensional mesopore symmetry) materials with diverse mesopore diameter and length was studied by evaluating the dynamic process of inner-pore electric double layer formation. Scanning electron microscopy and nitrogen cryo-sorption methods wer…
Supercapacitor Materials and FabricationConducting polymers and applicationsMesoporous Materials and Catalysis
Houria Kabbour、Étienne Janod、B. Corraze 等 7 位作者2008-06-06Journal of the American Chemical Society
The oxychalcogenides A2F2Fe2OQ2 (A = Sr, Ba; Q = S, Se), which contain Fe2O square planar layers of the anti-CuO2 type, were predicted using a modular assembly of layered secondary building units and subsequently synthesized. The physical properties of these compounds were characterized using magnetic susceptibility,…
Physics of Superconductivity and MagnetismAdvanced Condensed Matter PhysicsIron-based superconductors research
Arnaldo T. Lorenzo、Alejandro J. Müller2008-06-06Journal of Polymer Science Part B Polymer Physics
Abstract Classical kinetic theories of polymer crystallization were applied to isothermal crystallization kinetics data obtained by polarized optical microscopy (PLOM) and differential scanning calorimetry (DSC). The fitted parameters that were proportional to the energy barriers obtained allow us to quantitatively es…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesChemistry and Chemical Engineering
Minoru Okamoto、Tsuyohiko Fujigaya、Naotoshi Nakashima2008-06-06Advanced Functional Materials
Abstract Polybenzimidazole (PBI) is shown to individually dissolve/disperse single‐walled carbon nanotubes (SWNTs) in N , N ‐dimethylacetamide (DMAc), which is demonstrated by vis‐near IR absorption and photoluminescence spectroscopy and atomic force microscopy observations. By casting these dispersions, SWNTs/PBI com…
Carbon Nanotubes in CompositesGraphene research and applicationsConducting polymers and applications
Masaharu Tsuji、Ryoichi Matsuo、Peng Jiang 等 10 位作者2008-06-06Crystal Growth & Design
Shape-dependent Au@Ag core−shell nanocrystals have been successfully synthesized by using a two-step method. First, Au nanocrystal seeds with various shapes including single-crystal octahedron, single-twinned triangle or hexagon plate, and multiple-twinned decahedron were prepared by reducing HAuCl 4 in ethylene glyco…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesNanocluster Synthesis and Applications
Tino Roll、Tobias Kunstmann、Markus Fendrich 等 5 位作者2008-06-06arXiv
The dissipation of energy in dynamic force microscopy is usually described in terms of an adhesion hysteresis mechanism. This mechanism should become less efficient with increasing temperature. To verify this prediction we have measured topography and dissipation data with dynamic force microscopy in the temperature r…
Materials Sciencephysics.atom-ph
Tino Roll、Marion Meier、Henning Lebius 等 4 位作者2008-06-06arXiv
CaF2(111) single crystal surfaces have been irradiated with swift heavy ions under oblique angles resulting in chains of nanosized hillocks. In order to characterize these nanodots with respect to their conductivity we have applied non-contact atomic force microscopy using a magnetic tip. Measurements in UHV as well a…
Materials Sciencephysics.atom-ph
Victor Ryzhii、Vladimir Mitin、Maxim Ryzhii 等 5 位作者2008-06-06Applied Physics Express
An analytical device model for a graphene nanoribbon phototransistor (GNR-PT) is presented. GNR-PT is based on an array of graphene nanoribbons with the side source and drain contacts, which is sandwiched between the highly conducting substrate and the top gate. Using the developed model, we derive the explicit analyt…
Carbon Nanotubes in CompositesGraphene research and applicationsThermal Radiation and Cooling Technologies
Quan Yin、Sergey Y. Savrasov2008-06-06Physical Review Letters
Using a novel many-body approach, we report lattice dynamical properties of UO2 and PuO2 and uncover various contributions to their thermal conductivities. Via calculated Grüneisen constants, we show that only longitudinal acoustic modes having large phonon group velocities are efficient heat carriers. Despite the fac…
High-pressure geophysics and materialsNuclear Materials and PropertiesQuantum, superfluid, helium dynamics
O. Lopez-Acevedo、D. Koudela、H. Häkkinen2008-06-06arXiv
Electrical conductance through various nanocontacts between gold electrodes is studied by using the density functional theory, scalar-relativistic pseudopotentials, generalized gradient approximation for the exchange-correlation energy and the recursion-transfer-matrix method along with channel decomposition. The nano…
Materials Science
Andrew Kunz、Sarah C. Reiff2008-06-06arXiv
Controlling domain wall motion is important due to the impact on the viability of proposed nanowire devices. One hurdle is slow domain wall speed when driven by fields greater than the Walker field, due to nucleation of vortices in the wall. We present simulation results detailing the dynamics of these vortices; inclu…
Materials Science
Tino Roll、Marion Meier、Ulrich Fischer 等 4 位作者2008-06-06arXiv
Atomic force microscopy using a magnetic tip is a promising tool for investigating conductivity on the nano-scale. By the oscillating magnetic tip eddy currents are induced in the conducting parts of the sample which can be detected in the phase signal of the cantilever. However, the origin of the phase signal is stil…
Materials Sciencephysics.atom-ph
I. D. Hughes、M. Däne、A. Ernst 等 8 位作者2008-06-06New Journal of Physics
We describe an ab initio theory of finite temperature magnetism in strongly-correlated electron systems. The formalism is based on spin density functional theory, with a self-interaction corrected local spin density approximation (SIC-LSDA). The self-interaction correction is implemented locally, within the Kohn–Korri…
Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
J. S. Langer、Swagatam Mukhopadhyay2008-06-06Physical Review E
We propose a model of a heterogeneous glass-forming liquid and compute the low-temperature behavior of a tagged molecule moving within it. This model exhibits stretched-exponential decay of the wave-number-dependent, self-intermediate scattering function in the limit of long times. At temperatures close to the glass t…
Material Dynamics and PropertiesTheoretical and Computational PhysicsSpectroscopy and Quantum Chemical Studies
Youssef Habibi、Thomas M. Heim、Roger Douillard2008-06-06Journal of Polymer Science Part B Polymer Physics
Abstract In this article, we describe an efficient physical electric‐field‐assisted method to study self‐assembly and orientation of cellulose nanocrystals. When applying an alternating voltage to a cellulose nanocrystals suspension deposited onto a thin gap of coplanar lithographically patterned metallic electrodes,…
Advanced Cellulose Research StudiesPolysaccharides and Plant Cell WallsAdvanced Data Storage Technologies
R. Sainidou、F. J. García de Abajo2008-06-06arXiv
We introduce optically tunable surfaces based upon metallic gold nanoparticles trapped in open, water-filled gold cavities. The optical properties of the surfaces change dramatically with the presence and location of the particles inside the cavities. The precise position of the particles is shown to be controllable t…
Materials Science
J. L. M. van Mechelen、D. van der Marel、Claudio Grimaldi 等 8 位作者2008-06-06Physical Review Letters
We report a comprehensive THz, infrared and optical study of Nb-doped SrTiO3 as well as dc conductivity and Hall effect measurements. Our THz spectra at 7 K show the presence of an unusually narrow (<2 meV) Drude peak. For all carrier concentrations the Drude spectral weight shows a factor of three mass enhancement re…
Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
Xiaodong Cao、Yun Chen、Peter R. Chang 等 5 位作者2008-06-06Journal of Applied Polymer Science
Abstract New nanocomposite films were prepared from a mixed suspension of hemp cellulose nanocrystals (HCNs) and thermoplastic starch, or plasticized starch (PS), by the casting and evaporating method. The morphology, thermal behavior, mechanical properties, and water sensitivity of the films were investigated by mean…
Nanocomposite Films for Food PackagingNatural Fiber Reinforced CompositesAdvanced Cellulose Research Studies