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 the investigation of the ultrafast carrier dynamics in thin tetrahedral amorphous carbon films by means of femtosecond time-resolved reflectivity. We estimated the electron–phonon relaxation time of a few hundred femtoseconds and we observed that under low optical excitation photo-generated carriers decay ac…
2- and 4-probe dark conductivity (DC) data obtained for thin-film and solid-state samples of undoped PZnn oligomers show that the measured DCs for these species span an impressively wide range. Sterically unencumbered PZnn oligomers enable augmented interchain electronic coupling in the solid state and provide electro…
Mesoporous Eu 2 O 3 microspindles have been prepared by a facile solution process followed by subsequent heat treatment. By adding urea stepwise and varying the reaction time, the dimension of the Eu 2 O 3 microspindles can be easily tuned from 250 × 100 nm to 900 × 400 nm. The products were characterized by X-ray dif…
We observe a distinct anomaly in dielectric permittivity $({\ensuremath{\epsilon}}^{\ensuremath{'}})$ as well as relaxation time $({\ensuremath{\tau}}_{0})$ versus temperature $(T)$ pattern at the antiferromagnetic transition point ${T}_{N}$ in a single crystal of $\mathrm{La}\mathrm{Mn}{\mathrm{O}}_{3}$. The equivale…
End-tethered polymer chains usually adopt mushroomlike structures on the surface when their density is low. The behaviors of these surface-attached hemicoils are described by existing polymer theory. Dolan and Edwards derived the free energy of a single polymer chain confined between two planar surfaces. Their theory…
Advanced qualification methodology for actively cooled plasma facing components, Durocher, A., Escourbiac, F., Grosman, A., Boscary, J., Merola, M., Cismondi, F., Courtois, X., Farjon, J.L., Missirlian, M., Schlosser, J., Tivey, R.
BACKGROUND: Spiroketals and the corresponding aza-spiroketals are the structural features found in a number of bioactive natural products, and in compounds possessing photochromic properties for use in the area of photochemical erasable memory, self-development photography, actinometry, displays, filters, lenses of va…
Wie aus dem Nichts: Starke photoinduzierte Änderungen des Ferromagnetismus wurden an der Grenzfläche zwischen Goldnanopartikeln (Au-NPs) und ankonjugierten Azobenzolthiolen beobachtet. Die photomagnetischen Effekte können einem Wechsel des bei der Photoisomerisierung des Azoliganden auftretenden Ladungsverlustes und d…
We report on Raman measurements carried out on ${\mathrm{Ca}}_{2}\mathrm{Fe}\mathrm{Mo}{\mathrm{O}}_{6}$ and ${\mathrm{Sr}}_{2}\mathrm{Fe}\mathrm{Mo}{\mathrm{O}}_{6}$ double perovskites as functions of pressure $(0--15\phantom{\rule{0.3em}{0ex}}\mathrm{GPa})$ and of temperature $(298--370\phantom{\rule{0.3em}{0ex}}\ma…
Choosing the proper material testing technique is important not just for economic reasons; in many circumstances, it can save lives. Building on the common links among all types of material evaluation methods, Introduction to the Principles of Materials Evaluation presents a thorough examination of all types of destru…
Phase separation is a key phenomenon producing a heterogeneous structure in various kinds of material covering from liquid to soft and to hard matter. It is known that viscoelastic effects play a crucial role in phase separation of dynamically asymmetric mixtures such as polymer solutions, protein solutions, and collo…
Surface processes on Pt4Mo alloy well-defined by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were studied in acid solution by cyclic voltammetry. It was established that Mo in the alloy is much more resistant toward electrochemical dissolution than pure Mo. During the potential cycling of Pt4Mo…
We present theoretical investigations of the anharmonic phonon mean-free path in cubic and hexagonal AlN. The cubic anharmonicity in crystal potential has been modeled within an anharmonic elastic continuum model. Numerical calculations have been carried out within the Fermi's golden rule scheme and by using the phono…
Films of the molecular nanomagnet Mn12ac with thicknesses spanning the nm to μm range have been deposited using a customised vacuum spray deposition technique. The films have been characterized by AFM, XPS, magnetic and magneto-optical measurements, indicating that the deposition procedure does not damage the Mn12ac m…
A supercritical carbon dioxide (CO(2)) plasma process for fabricating one-dimensional tungsten oxide nanowires coated with amorphous carbon is presented. High-frequency plasma was generated in supercritical carbon dioxide at 20 MPa by using tungsten electrodes mounted in a supercritical cell, and subsequently an organ…
We have devised an isotropic interaction potential that gives rise to negative thermal expansion (NTE) behavior in equilibrium many-particle systems in both two and three dimensions over a wide temperature and pressure range (including zero pressure). An optimization procedure is used in order to find a potential that…
The effect of the average $R$-site ionic radius $⟨\mathrm{IR}⟩$ and variance on the orbital and magnetic order in ${R}^{3+}$-doped ${\mathrm{YVO}}_{3}$ was studied in ${\mathrm{Y}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}{\mathrm{VO}}_{3}$ and ${\mathrm{Y}}_{1\ensuremath{-}x}({\mathrm{La}}_{0.2337}{\mathrm{Lu}}_{0.7663}{)}…
Liquid silicone rubbers (LSR) are widely used to create devices with complex shapes for various commercial and consumer applications, because of their many beneficial properties including lubricity, thermal and electrical stability, and aesthetic feel. Regulatory bodies require postcure thermal treatment of silicone e…
Hydrogen bonding, H-D exchange, and molecular mixing in water films on TiO2(110) have been studied using water electron-stimulated desorption. For T<70 K, films with different water isotopes adsorbed on the Ti4+ and bridging oxygen rows can be prepared. For T>70 K, H-D and molecular exchange between these "layers" occ…
We have examined the synthesis and stability of ZnS quantum dots (QDs) using an all-aqueous route at pH = 12 with (3-mercaptopropyl)trimethoxysilane (MPS) as the capping molecule. The MPS-capped ZnS QDs obtained were well dispersed with a particle size around 5 nm and a cubic zinc blende crystalline structure. The QDs…