Materials Literature
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Bridging the difference in atomic structure between experiments and theoretical calculations and exploring quantum confinement effects in thin electrodes (leads) are both important issues in molecular electronics. To address these issues, we report here, by using Au-benzenedithiol-Au as a model system, systematic inve…
It was found that the diameter distribution of single-walled carbon nanotubes (SWNTs) grown by the chemical vapor deposition (CVD) method could be controlled by the carbon feeding rate at the growth stage. A unified hypothesis on the relationship between nanoparticle size, growth condition, growth temperature, and dia…
Single-walled carbon nanotubes (SWNTs) are exfoliated and functionalized into small bundles and individuals by vigorous stirring "on water" in the presence of a substituted aniline and an oxidizing agent. This is an example of an "on water" reaction that leads to functionalized SWNTs, and it represents a "green", or e…
The alternate deposition of polyanions and polycations leads to the formation of films called polyelectrolyte multilayer films (PEMs). Two types of growth processes are reported in the literature, leading to films that grow either linearly or exponentially with the number of deposition steps. In this article we try to…
Crystal growth of ZnS nanoparticles during hydrothermal coarsened in 4 M NaOH occurs via a two-stage process. In the first stage, the primary particles grow into a size over hundred times of the original volume. The initial growth rate can be fitted by an asymptotic curve. High-resolution transmission electron microsc…
The efficiency of conventional solar cells is limited because the excess energy of absorbed photons converts to heat instead of producing electron-hole pairs. Recently, efficient carrier multiplication has been observed in semiconductor quantum dots. In this process, a single, high-energy photon generates multiple ele…
Magnetic nanoparticles have been investigated for biomedical applications for more than 30 years. In medicine they are used for several approaches such as magnetic cell separation or magnetic resonance imaging (MRI). The development of biocompatible nanosized drug delivery systems for specific targeting of therapeutic…
We describe in detail how to implement a coarse-grained hybrid molecular dynamics and stochastic rotation dynamics simulation technique that captures the combined effects of Brownian and hydrodynamic forces in colloidal suspensions. The importance of carefully tuning the simulation parameters to correctly resolve the…
Abstract The effect of IIIB transition metals on the electronic properties of Indium Oxide (In 2 O 3 ) has been studied, using first‐principles calculations method based on the density functional theory (DFT), with generalized gradient approximation (GGA). The results show a band gap of 1.03 eV for pure indium oxide,…
Maxwell–Wagner–Sillars (MWS) relaxation in nylon 1010, arising from charge carriers accumulated at the interphase between amorphous and crystalline regions, has been investigated by means of dielectric relaxation spectra. In the frequency spectra of nylon 1010, dielectric permittivity showed high values at low frequen…
Emerging materials can influence the dissipation, dispersion, and refraction of light, producing resonant effects that allow intricate control of electromagnetic waves for new applications.
A Reply to the Comment by Lydéric Bocquet, Patrick Tabeling, and Sébastien Manneville.Received 3 May 2006DOI:https://doi.org/10.1103/PhysRevLett.97.109602©2006 American Physical Society
We propose a possible mechanism for the generation of magnetic fields in negative refraction index composite metamaterials. Considering the propagation of a high-frequency modulated amplitude electric field in a left-handed material (LHM), we show that the ponderomotive interaction between the field and low-frequency…
Polystyrene- b -poly( l -lactide) (PS−PLLA) diblock copolymers with high and low molecular weights were synthesized to form strongly and weakly segregated thin-film morphologies, respectively (i.e., ordered lamellar and disordered textures). Large-sized, well-oriented lamellar microstructures of PS−PLLA thin films wer…
It has been known for more than 20 years that, in crazes of polystyrene (PS), the craze fibrils show a very high ductility with elongations at break up to 300%. Later, a similarly high ductility was found in laminated multilayer tapes and in styrene‐butadiene‐styrene (SBS) block copolymers with an arrangement of very…
The gas turbine consists of many different pieces of turbomachinery, but the rows of turbine blading are of the greatest importance since many engine characteristics, for example the fuel economy and thrust, depend very strongly on the operating conditions which can be withstood by them. Thus very arduous temperatures…
We demonstrate the one-step synthesis of a silica-gold nanocomposite by simultaneous hydrolysis and reduction of gold chloride. The aminophenyl group was used as a reducing agent, and the trimethoxy silane group acts a precursor for the formation of silica. The porous gold nanoparticles were formed by etching out the…
Abstract By an operator method, the general solution of three‐dimensional elasticity of quasicrystals is given constructively with some displacement functions, and its completeness is proved at the same time. Nonuniqueness and the scope of nonuniqueness of the general solution are also pointed out. The method used in…
Poly(DL-lactide-co-glycolide) (PLG) was chemically conjugated on two amino cyclodextrins, mono(6-(2-aminoethyl)amino-6-deoxy)-beta-cyclodextrin and ethylenediamino bridged bis(beta-cyclodextrin), to afford novel amphiphilic conjugates. Those conjugates were then characterized with infrared spectrometry (IR), proton nu…
Two symmetrical double aza‐crowned Schiff base cobalt(II) complexes were synthesized and characterized, and the metallomicelle made up of the cobalt(II) complexes and surfactant, as mimic hydrolytic metalloenzyme, was used in catalytic hydrolysis of bis(4‐nitrophenyl) phosphate (BNPP). The analysis of specific absorpt…