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。
Theory of diffusion-mediated reactions is already established for the target problem in the dilute limit, where the immobile target is surrounded by many quenchers. For lattice random walks in the crowded situation, each quencher is surrounded by other quenchers differently. As a result, each quencher migrates differe…
The ground-state properties of $R{\text{MnO}}_{3}/A{\text{MnO}}_{3}$ (RMO/AMO) heterostructures (with $R=\text{La},\text{Pr},\dots{}$, a trivalent rare-earth cation and $A=\text{Sr},\text{Ca},\dots{}$, a divalent alkaline cation) are studied using a two-orbital double-exchange model including the superexchange couplin…
Time-resolved Raman spectroscopy has been applied to probe the anharmonic coupling and electron-phonon interaction of optical phonons in graphite. From the decay of the transient anti-Stokes scattering of the $G$-mode following ultrafast excitation, we measured a lifetime of $2.2\ifmmode\pm\else\textpm\fi{}0.1\text{ }…
The ability to determine the structure of matter in three dimensions has profoundly advanced our understanding of nature. Traditionally, the most widely used schemes for 3D structure determination of an object are implemented by acquiring multiple measurements over various sample orientations, as in the case of crysta…
Abstract Phototuning of more than 2000 nm is demonstrated in an azobenzene‐based cholesteric liquid crystal (azo‐CLC) consisting of a high‐helical‐twisting‐power, axially chiral bis(azo) molecule (QL76). Phototuning range and rate are compared as a function of chiral dopant concentration, light intensity, and thicknes…
Hole spin relaxation in [001] strained asymmetric Si/Si$_{0.7}$Ge$_{0.3}$ (Ge/Si$_{0.3}$Ge$_{0.7}$) quantum wells is investigated in the situation with only the lowest hole subband being relevant. The effective Hamiltonian of the lowest hole subband is obtained by the subband Löwdin perturbation method in the framewor…
Random copolymers consisting of n -butyl acrylate backbones with quadruple hydrogen-bonding side chains based on 2-ureido-4[1 H ]-pyrimidinone (UPy) have been synthesized via controlled radical polymerization and postpolymerization functionalization. Through this synthetic strategy high UPy monomer content (15 mol %)…
Conducting polymers are an interdisciplinary research area involving close collaborations between chemists, material scientists, physicists, and engineers. The field has developed during the last 30 years due to an interest in academic research as well as in possible commercial applications. Much research has been per…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTSpectroscopic and Theoretical Studies of Transition Metal Oxides and Dioxygen ComplexesYu Gong, Mingfei Zhou*, and Lester Andrews†View Author Information Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Advanced Materials Labor…
Single-molecule surface-enhanced Raman scattering (SERS) detection of nonresonant molecules is demonstrated experimentally using the bianalyte SERS method. To this end, bianalyte SERS is performed at 633 nm excitation using the nonresonant molecule 1,2-di-(4-pyridyl)-ethylene (BPE) in combination with a benzotriazole…
BACKGROUND: Nanoparticles possess exceptional physical and chemical properties which led to rapid commercialisation. Silver nanoparticles (Ag-np) are among the most commercialized nanoparticles due to their antimicrobial potential. Ag-np based cosmetics, therapeutic agents and household products are in wide use, which…
Abstract ZnO flower‐like nanostructures were grown on Ge (100) substrate, by a modified chemical vapor condensation technique of zinc acetate dihydrate at 300 °C, without using any catalyst. These self‐organized three‐dimensional nanostructures were composed of hierarchical arrangement of ZnO nanorods of diameter ∼50…
The initial stage of liquid absorption in unsaturated nonwoven fabrics (e.g. dry wipes, absorbent materials and hygiene products) is an unsteady-state fluid flow. For the purpose of the engineering design of these nonwoven products, there is a need to predict the unsteady-state fluid flow in both homogeneous anisotrop…
On September 11, 2006, “unusual” deflections of an overhead bridge-mounted sign support truss along IR 75 in Dayton, Ohio were reported. Investigation by Ohio DOT road crews revealed the complete fracture of two truss members near one of the truss supports. While total collapse did not occur, such an event could have…
Shape memory polymers (SMPs) are materials with a great potential for future use in smart materials and structures. When heated from cold state (below the transformation temperature, which can either be the glass transition temperature or the melting temperature of the polymer) to hot state (above the transformation t…
The creation of nanostructures of the photoactive polymer polypyrrole (PPy) on glass substrates with the spin-coating method is described. No additional post-production treatment is necessary to obtain uniformly distributed photoactive nanostructures on macroscopically scaled substrates. Based on X-ray reflectivity me…
The molecular and crystalline structure of ethyl 1',2',3',4',4a',5',6',7'-octahydrodispiro[cyclohexane-1,2'-quinazoline-4',1''-cyclohexane]-8'-carbodithioate (I) was solved and refined from powder synchrotron X-ray diffraction data. The initial model for the structural solution in direct space using the simulated anne…
Polystyrene (PSt)-based copolymer/montmorillonite (MMT) nanocomposites were prepared by an in situ vapor-phase-assisted surface polymerization (VASP) as a solventless method using an organically modified MMT and a free radical initiator. Simultaneous and consecutive VASP of styrene (St) and methyl methacrylate (MMA) o…
The focus of this work was to evaluate the use of commercially available matting systems to sustain C-130 and C-17 transport aircraft loads over soil bases having different California bearing ratio (CBR) ranges. Test sections were constructed using three range of CBR: high (CBR=40–50) , medium (CBR=8–10) , and low (CB…
The facet selectivity of the halide ions and chlorauric acid for several shaped silver nanocrystals is presented in this paper. Two inorganic ions show different representations when they are used for etching silver nanocrystals in the self-sacrificial template reaction. The morphological changes of the silver nanocry…