Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A facile route is described for the regioselective conjugation of organo-soluble polymers onto chitosan under very mild conditions, using SCC as intermediates. SCC could be prepared simply by mixing chitosan acidic aqueous solution with SDS. PEG or PCL were then grafted to SCC using the NHS/DCC coupling method. In add…
A novel and facile β-cyclodextrin-assisted method has been employed in this study to prepare superparamagnetic Fe 3 O 4 nanoparticles from a single iron precursor of FeCl 3 ·6H 2 O. Various characterization involving X-ray diffraction (XRD), standard and high-resolution transmission electron microscopy (TEM and HRTEM)…
Surface-enhanced Raman scattering (SERS) was observed for oxazine 720 molecules adsorbed on a copper film pierced by nanohole arrays. Each of the arrays had a different hole periodicity. The dependence of SERS intensity on hole periodicity was examined using two experimental geometries: forward-scattering and backscat…
A rational approach to the synthesis of silver-chromium mixed-metal coordination polymers is presented: 3-cyanoacetylacetone (HacacCN) features two potential binding sites. After deprotonation, it has been used as a chelating dionato ligand in the pseudo octahedral complex Cr(acacCN) 3; two polymorphs of this compound…
An effective multilayer interlayer technology for rapid transient-liquid-phase joining of advanced ceramics is demonstrated. Interlayers designed to exhibit rapid interdiffusion, chemical homogenization, and liquid film disappearance, enable rapid and reliable joining of ceramics at reduced temperatures while preservi…
Abstract DSC indicated that the nucleation of PLLA is enhanced in the presence of PGA even at a PGA content as low as 0.1 wt.‐%. However, the enhancing behavior of PGA was different to that of other nucleating agents for PLLA. Polarized optical microscopy revealed that the presence of PGA increased the number of PLLA…
Cationic and anionic cobalt oxide clusters, generated by laser vaporization, were studied using guided-ion-beam mass spectrometry to obtain insight into their structure and reactivity with carbon monoxide. Anionic clusters having the stoichiometries Co2O3(-), Co2O5(-), Co3O5(-) and Co3O6(-) were found to exhibit domin…
Abstract We introduce and discuss the recently developed concept of electrostatic self‐assembly for the formation of nanoscale assemblies in solution. As opposed to many approaches to self‐assembly relying on amphiphilicity, the driving force here is electrostatics plus secondary interaction such as stacking of aromat…
We calculate the average single-particle density of states in graphene with disorder due to impurity potentials. For unscreened short-ranged impurities, we use the non-self-consistent and self-consistent Born and $T$-matrix approximations to obtain the self-energy. Among these, only the self-consistent $T$-matrix appr…
Microstructure and spectroscopic properties of YV1−xPxO4:2 mol % Eu3+ (x=0, 0.05, 0.5, 0.95, and 1) powders derived from solid state reaction method were systematically reinvestigated by various spectroscopic techniques such as x-ray diffraction, Fourier transform infrared, excitation and emission spectra, and particu…
The complete oxidation of methane into water and carbon dioxide on the (111) surface of ceria is considered within a DFT + U framework in order to gain insight into the coke-free operation of solid oxide fuel cells with ceria-containing anodes. Preferred adsorption sites and energies are determined for CH x ( x = 0, .…
We present the results of calculations of surface relaxations, energetics, and bonding properties for ${\text{CaTiO}}_{3}$ (001) and (011) surfaces using a hybrid description of exchange and correlation. We consider both CaO and ${\text{TiO}}_{2}$ terminations of the nonpolar (001) surface and Ca, TiO, and O terminati…
The purpose of this study was to evaluate the biocompatibility of silk and collagen-hyaluronan (HA) in vitro by assessing anterior cruciate ligament (ACL) cell and T-lymphocyte cultures on scaffolds. The use of composite scaffolds as artificial ligaments in ACL reconstruction and their effects on angiogenesis were eva…
The relationship between band gap and biaxial stress in wurtzite ZnO thin films has been investigated by side-inclination x-ray diffraction technique and optical absorbance spectrum as well as ab initio calculation. The experimental result shows that differing from other semiconductor thin films with hexagonal structu…
A new biocompatible film based on chitosan and poly(L-glutamic acid) (CS/PGA), created by alternate deposition of CS and PGA, was investigated. FT-IR spectroscopy, UV-vis spectroscopy and QCM were used to analyze the build-up process. The growth of CS and PGA deposition are both exponential to the deposition steps at…
The effect of shear flow on the isotropic-nematic phase transition of attractive colloidal rods is investigated by a combination of simulations and experiments. The isotropic phase aligns with the flow, while the nematic phase undergoes a collective rotational motion which frustrates the merging of the coexisting regi…
The effects of passing ozone over different zeolite and MCM-41 materials to remove toluene were investigated. Different ozone-to-toluene ratios were used to evaluate the catalytic performance during ozonation. The micro- and meso-porous materials removed about 50% of the toluene via adsorption and another 20-40% was d…
Stable, room-temperature ferromagnetism in carbon— more precisely, highly oriented pyrolytic graphite — with Curie temperature as high as 460 K is reported. The magnetization can be easily tuned by controlling the low-energy carbon ion implantation dose used to create the samples. Theory indicates that the ferromagnet…
The electrical conductivity behaviour in the paraelectric state has been investigated in lanthanum modified lead zirconate titanate (PLZT) ceramics, considering the universal relaxation law. The contribution of conductive processes to the dielectric response for the low-frequency range was discussed taking into accoun…
Abstract For an alternative front side metallization process without screen printing of metal paste the selective opening of the front surface anti‐reflection coating could be realized by laser ablation. A successful implementation of this scheme requires direct absorption of the laser light within the anti‐reflection…