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。
Computer-generated holograms (CGHs), such as those used in optical testing, are created by etching patterns into an optical substrate. Imperfections in the etching can cause small scale surface roughness that varies across the pattern. The variation in this roughness affects the phase and amplitude of the wavefronts i…
Yarn splicing joins two yarns by applying a blast of compressed air into a profiled device called a splicing chamber. Splicing is a mature technology, but there is little published work on its fundamental principles. The current research program addresses these principles. However, the research confronts many variable…
Data analysis methods for specular X-ray or neutron reflectivity are compared. The methods that have been developed over the years can be classified into different types. The so-called classical methods are based on Parrat's or Abelès' formalism and rely on minimization using more or less evolved Levenberg–Marquardt o…
The structure and self-diffusion of NaI and NaCl at temperatures close to their melting points are studied by first principles Hellmann-Feynman molecular dynamics (HFMD). The results are compared with classical MD using rigid-ion (RI) and shell-model (ShM) interionic potentials. HFMD for NaCl was reported before at a…
Abstract A novel organic/inorganic hybrid honeycomb patterned porous thin film was prepared using the breath‐figure method combined with a sol‐gel process. An in situ formed gelable block copolymer, formed by mixing poly(styrene‐ alt ‐maleic anhydride)‐ block ‐polystyrene (P(St‐ a ‐MAn)‐ b ‐PS) and 3‐aminopropyltrimet…
One fascinating high-pressure behavior of tetrahedral glasses and melts is the local coordination change with increasing pressure, which provides a structural basis for understanding numerous anomalies in their high-pressure properties. Because the coordination change is often not retained upon decompression, studies…
Abstract The route of synthesis of new polyetherols with pyrimidine ring from barbituric acid (BA) was presented. The polyetherols were obtained in two steps: synthesis of hydroxymethyl derivative of BA followed by reaction of the latter with neat ethylene or propylene oxides. Physical properties of the products and p…
Temperature dependences of the vibrational and magnetic properties of the high symmetry parent phase in three different alloys ${\mathrm{Ni}}_{51.1}{\mathrm{Mn}}_{24.9}{\mathrm{Ga}}_{24.0}$, ${\mathrm{Ni}}_{49.7}{\mathrm{Mn}}_{24.1}{\mathrm{Ga}}_{26.2}$, and ${\mathrm{Ni}}_{49.6}{\mathrm{Mn}}_{21.9}{\mathrm{Ga}}_{28.5…
We investigate the effect that process conditions have on the structural characteristics and mechanical response of a cylindrically phase-separated poly(styrene−ethylene- co -butylene−styrene) (SEBS) triblock copolymer system. Small-angle X-ray diffraction (SAXD) and transmission electron microscopy (TEM) have been us…
The most critical limit of macromolecular crystallography, the experimental data resolution, is partially `tricked' by the ` free lunch method' (non-measured reflection extrapolation). The best electron density map available when only observed data are used may be employed to extrapolate moduli and phases of unobserve…
A new analytical spectroelectrochemical methodology is reported on that utilizes an optically transparent boron-doped diamond thin film. The film was deposited on undoped Si by microwave-assisted chemical vapor deposition using a 4-h growth with a 0.5% CH4/H2 source gas mixture and 2 ppm B2H6 added for boron doping. T…
We have determined the ground state structures of sodium ions in ${\mathrm{Na}}_{x}\mathrm{Co}{\mathrm{O}}_{2}$ by a combination of the Monte Carlo method and the first-principles method. We predict the ground state structures at $x=1∕4$, $1∕3$, $1∕2$, $3∕5$, $5∕7$, $3∕4$, and $13∕16$. Our results on the stable phases…
First-principles density functional theory calculations have been applied to study the electronic and optical properties of $A$-site substituted lead zirconate titanate (PZT), where group IIIA and group VB elements partially substitute Pb sites. The conduction band minima in the group IIIA element substituted PZT syst…
Abstract The development of dendritic polymers, including dendrimers as well as hyperbranched or highly branched polymers, is rapidly growing in all fields of polymer chemistry. This review article focuses on dendritic polymers based on urethane chemistry as a principle of construction, summarizing synthetic approache…
Pressure allows one to explore the energy landscape and the various conformations of macromolecules. This might be one of the most interesting prospects of combining macromolecular crystallography (MX) with pressure perturbation. This paper presents innovations in high-pressure macromolecular crystallography (HPMX). A…
In this study, a grazing-incidence X-ray scattering (GIXS) formula was derived for gyroid structures formed in thin films supported on substrates. Two-dimensional GIXS patterns were measured for gyroid structures formed in polystyrene- b -polyisoprene (PS- b -PI) diblock copolymer nanometre-scale thin films supported…
To understand the coordination chemistry of a DO3A-conjugated triphenylphosphonium (TPP) cation, triphenyl(4-((4,7,10-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecan-1-yl)methyl)benzyl)phosphonium (DO3A-xy-TPP), with diagnostically important metal ions, In(DO3A-xy-TPP)+, Ga(DO3A-xy-TPP)+, and Mn(DO3A-xy-TPP) were pr…
Abstract The interaction of hydrogen with metal surfaces is one of the most important and fundamental processes in the chemical industry. Hydrogen is also strongly tipped to play a central role in new challenges that are emerging in terms of climate change and energy supply, and the reversible binding of H 2 to suitab…
The structures of high-quality ZnO epitaxial films grown by pulsed-laser deposition on sapphire (0001) without an oxygen gas flow were investigated by X-ray diffraction and transmission electron microscopy. The great disparity of X-ray diffraction line widths between the normal and in-plane reflections reveals the spe…
La?Ag and La?Na perovskite manganites could be considered as smart mediators for various biomedical applications requiring self-controlled isothermal heating including magnetic hyperthermia. Dissipation of the alternating magnetic field energy causes heating of their aqueous suspensions to terminate at 42?48??C withou…