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。
Vanadium oxides based materials are well known to play an active role as catalysts in many chemical processes of technological importance like for example hydrocarbon oxidation reactions or selective catalytic reduction of NO x in the presence of ammonia. Usually the (010) surface is pointed out as the most important,…
We consider the two-dimensional Hubbard model on the honeycomb lattice, as a model for single-layer graphene with screened Coulomb interactions; at half filling and weak coupling, we construct its ground-state correlations by a convergent multiscale expansion, rigorously excluding the presence of magnetic or supercond…
We have found that the electromechanical resonance frequency of Terfenol-D/Pb(Zr x Ti 1− x )O 3 laminated composites can be tuned by an applied dc magnetic ( H dc ) bias. With increasing H dc from 0 to 5000 Oe, the resonance frequency ( f r ) can be shifted over the range of 40 ⩽ f r ⩽ 55 kHz. This finding offers a me…
We show that an experimentally attainable magnetic field applied along the axis of a metallic carbon nanotube not only opens the gap in the nanotube energy spectrum but also allows optical transitions, which are forbidden in the absence of the field. Possible terahertz applications of this effect are discussed.
Metal catalysts are widely used for nanowire (NW) growth and are one of the essential parameters that dictate the crystal growth phenomena, thus controlling the NW's morphology. Although extensive research has been conducted on catalyst effects, the catalyst drifting effect is generally underestimated for controlling…
Ionic liquid (IL)-reconstituted acrylic acid (AA)-functionalized cellulose microparticles were successfully prepared by a water-in-oil suspension technique preliminary modification with AA in homogeneous condition. Cellulose was fully dissolved in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) IL, and subsequently wa…
Inhomogeneous broadening due to isotopic randomness in natural Si has been shown to cause a broadening of many of the ground-state to excited-state infrared-absorption transitions of the shallow donor phosphorus and acceptor boron. Previously, it had been thought that the observed linewidths of shallow impurity transi…
We report on comparative experimental study of FRET efficiency in two different systems: organic dye molecules (donors) and CdSe-ZnS core-shell nanodots or nanorods (acceptors). Fluorescein isothiocyanate was bound chemically to the surface of nanocrystals using cysteine as a linker and the conjugates were embedded in…
Abstract To combine the advantages of a biopolymer with hydrotalcite in an enzyme immobilization system, the intercalation polymerization was used to prepare poly(acrylic acid‐ co ‐acrylamide)/hydrotalcite (PAA‐AAm/HT) nanocomposite hydrogels using sodium methyl allyl sulfonate as intercalation agent. Transmission ele…
Complex nanoparticles (NPs) of poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene) (MEH-PPV) NP adsorbed with Au NPs (MEH-PPV/Au NPs) were fabricated through a reprecipitation method. The formation of MEH-PPV/Au NP complexes was confirmed through high-resolution transmission electron microscopy and Fourier trans…
We report on an application of silk as an ultrathin redox-active template for controllable, one-step synthesis of gold nanoparticles via control over silk secondary structure. We found that both silk I and silk II molecular layers can facilitate gold nanoparticle formation at ambient conditions, indicating that tyrosi…
Thin films of the double perovskite ferromagnet ${\text{Sr}}_{2}{\text{FeMoO}}_{6}$ have been grown on MgO(001) substrates by pulsed laser deposition at temperatures as low as $600\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$. High-resolution X-ray diffraction studies revealed that the deposited films are singl…
Microscopic origin of magnetic-field $(B)$ induced electric polarization $(P)$ potentially up to near room temperature has been investigated for helimagnets ${\text{Ba}}_{2}{({\text{Mg}}_{1\ensuremath{-}x}{\text{Zn}}_{x})}_{2}{\text{Fe}}_{12}{\text{O}}_{22}$ with controlled magnetic anisotropy by revealing $B$- and $x…
Using in-field single-crystal neutron diffraction, we have determined the magnetic structure of TbMnO(3) in the high field P parallel a phase. We unambiguously establish that the ferroelectric polarization arises from a cycloidal Mn spin ordering, with spins rotating in the ab plane. Our results demonstrate directly t…
We report on the first use of carbon-nanotube-based films to produce crystals of proteins. The crystals nucleate on the surface of the film. The difficulty of crystallizing proteins is a major bottleneck in the determination of the structure and function of biological molecules. The crystallization of two model protei…
A novel amphiphilic diblock copolymer composed of a hydrophilic poly(ethylene oxide) and a hydrophobic polymethacrylate with photochromic azopyridine moieties in the side groups was synthesized by atom transfer radical polymerization. The copolymeric vesicles showed photoinduced circular process including fusion, dama…
We report here the magnetocaloric effect (MCE) in bulk and nanostructured gadolinium iron garnets (Gd3Fe5O12). When compared with the bulk counterpart, the magnitude of the MCE is smaller for nanostructured samples with an average grain size of 50nm, but increases when the grain size decreases to 35nm. For the bulk sa…
Abstract Linear and star shaped polyglycidols (synonym with polyglycerols) are prepared in a controlled ring opening polymerization of protected glycidols. Beside the molar mass and the polydispersity, the architecture of the polyglycidols is controlled by using mono‐ and multifunctional mono‐ and polydispers initiato…
This work reports a newly developed two-step hydrothermal method for the synthesis of monodispersed colloidal carbon spheres (CCS) under mild conditions. Using this approach, monodispersed CCS with diameters ranging from 160 to 400 nm were synthesized with a standard deviation around 8%. The monomer concentration rang…
We report our experimental study of the adsorption and diffusion of CO on clean TiO(2)(110)-1 x 1 at an atom-resolved scale with in situ scanning tunneling microscopy at 80 K, combined with density functional theory calculations. Our results reveal that the CO adsorption sites on the TiO(2)(110)-1 x 1 surface are pref…