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。
We report a process for preparing microdot arrays of SiO 2 from a tetraethoxysilane precursor containing either a cationic (CTAB) or non‐ionic surfactant. Controlling the ink jet deposition parameters and precursor hydrolysis made it possible to obtain mesoporous silica with a Pm 3 n cubic structure, using CTAB, or an…
Abstract We report the electropolymerization and characterization of polypyrrole films doped with poly(m‐aminobenzene sulfonic acid (PABS) functionalized single‐walled nanotubes (SWNT) (PPy/SWNT‐PABS). The negatively charged water‐soluble SWNT‐PABS served as anionic dopant during the electropolymerization to synthesiz…
CsBr phosphor ceramics doped with different luminescence centres such as In2O3, Eu2O3, EuCl3, SmCl3, TbCl3, GdCl3 or NdCl3 as the candidate for a new optically-stimulable phosphor for medical X-ray imaging sensor were prepared using a conventional ceramic fabrication process. It was found that X-ray-irradiated Eu-dope…
Abstract Polarized Raman and IR spectra have been measured for Y(HCOO) 3 ·2H 2 O single crystal at room temperature. Assignment of the observed bands to the respective internal and external vibrations was proposed on the basis of factor group approach for the orthorhombic P 2 1 2 1 2 1 (D 2 4 ) space group and the lit…
Experimental investigations have been performed to understand the effects of prior loading on the creep and stress relaxation behavior of an amorphous polymer (polyphenylene oxide) and a semi-crystalline polymer (high density polyethylene) at room temperature. Of particular interest was the positioning of creep and re…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
In the presence of sufficiently strong surface energy anisotropy, the equilibrium shape of an isothermal crystal may include corners or edges. Models of edges have, to date, involved the regularization of the corresponding free-boundary problem resulting in equilibrium shapes with smoothed out edges. In this paper, we…
Abstract Copolymers of citric acid and D ‐sorbitol were synthesized with a solvent‐free vacuum‐oven synthesis with molar ratios of citric acid to D ‐sorbitol ranging from 1/1 to 6/1. The extent of the reaction was followed by the monitoring of the residual acid content of the system. As expected, the reaction occurred…
Cu2O nanowires, mainly consisting of (100) and (200) polycrystalline structures with a length of 4 mum are prepared by electrochemical deposition using a porous alumina template. It is found that the optimized electrochemical conditions to prepare Cu2O nanowires are different from those for the formation of a bulk thi…
Smectic and lamellar liquid crystals are three-dimensional layered structures in which each layer behaves as a two-dimensional fluid. Because of their reduced dimensionality they have unique physical properties and challenging theoretical descriptions, and are the subject of much current research. One- and Two-Dimensi…
ZnO nanowires without or with Mg doping were produced by thermally oxidizing pure Zn or (Zn + Mg) powders. X-ray diffraction (XRD) patterns indicated that ZnO nanowires with and without Mg doping were crystalline with wurzite structure. The highest hydrogen uptake capability was 2.79 wt% at room temperature and 860 ps…
The Heusler alloy, ${\mathrm{Co}}_{2}\mathrm{Cr}\mathrm{Al}$, is an itinerant magnet that orders at $T=333\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. We have measured its temperature-dependent anomalous Hall effect and magnetoresistance from room temperature down to low temperatures. The magnetoresistance is positive and…
Using high resolution electron microscopy and first principles quantum mechanical calculations we have explored the fundamental physics and chemistry of the semiconductor, HgTe grown inside single wall carbon nanotubes. This material forms a low-dimensional structure based on a repeating Hg2Te2 motif in which both ato…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Functionalized polymer nanofibre membranes for protection from chemical warfare stimulants, Ramaseshan, Ramakrishnan, Sundarrajan, Subramanian, Liu, Yingjun, Barhate, R S, Lala, Neeta L, Ramakrishna, S
Nanotubes composed of layered or nonlayered materials have been synthesized through various methods, among which template-based electrodeposition technology provides a versatile technique for synthesizing one-dimensional nanostructured materials. However, the growth mechanism of nanotubes using the template method is…
One usual way to strengthen a metal is to add alloying elements and to control the size and the density of the precipitates obtained. However, precipitation in multicomponent alloys can take complex pathways depending on the relative diffusivity of solute atoms and on the relative driving forces involved. In Al-Zr-Sc…
The ferromagnetism of a thin ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ layer with a perpendicular easy anisotropy axis is investigated by means of several techniques that yield a consistent set of data on the magnetic properties and the domain structure of this diluted ferromagnetic semiconductor.…
Condensation-induced water drop growth was studied on a super-hydrophobic spike surface. The dynamics are described by three main stages depending on the size of the drop with respect to the different spike pattern length scales. The initial stage is characterized by nucleation of the drops at the bottom (cavities) of…
In a manganite film without quenched disorder, we show texturing in the form of insulating and metallic stripes above and below Curie temperature (Tc), respectively, by high resolution scanning tunneling microscopy/spectroscopy (STM/STS). The formation of these stripes involves competing orbital and charge orders, and…