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。
Different methods such as axilens and binary-phase filter have been investigated to improve the depth of focus. A method is proposed to calculate an amplitude-phase pupil filter and obtain the desired distribution of intensity along the optical axis. It produces a narrow spot with a uniform intensity level over a larg…
Spin dynamics in (Ga,Mn)As films grown on GaAs(001) was investigated by Time-resolved magneto-optical Kerr effect. The Kerr signal decay time of (Ga,Mn)As without external magnetic field applied was found to be several hundreds picoseconds, which suggested that photogenerated polarized holes and magnetic ions are coup…
We have shown that highly efficient and air-stable 1531 nm emission can be realized in erbium/bismuth codoped zeolites. The luminescence lifetime of Er3+ at 1531 nm can reach up to 4.2 ms. Bismuth compounds formed by high temperature annealing can act as blockages of selectively closing down the “in-out windows” of wa…
The hydrogen storage is still a challenge for mobile applications. The diffusion of hydrogen in solids is considered as a general model system but there is limited knowledge available for the dynamics of hydrogen in complex hydrides. In this letter, we present a systematic approach to study the hydrogen-deuterium exch…
We report a flexible photodetector with a sandwich structure of Au/polythiophene (PTh)/Au, which consists of two Au electrodes with a thickness of 30 nm each and a PTh layer with a thickness of 10−40 μm. The devices showed strong and fast photoresponses under excitation through the gold electrodes using white light or…
Cationic poly[9,9'-bis[6''-(N,N,N-trimethylammonium)hexyl]fluorene-co-alt-phenylene]s with five different counterions (CIs) were synthesized and studied as fluorescence resonance energy transfer (FRET) donors (D) to dye-labeled DNA (FRET acceptor, A). The polymers with different CIs show the same pi-conjugated electro…
The alanine-based 16-mer peptide (AAKA)(4) has recently been shown to aggregate into a hydrogel at centimolar concentrations and high ionic strength ( Measey, T. J.; Schweitzer-Stenner, R. J. Am. Chem. Soc. 2006 , 128 , 13324. ). This is a surprising result since the current understanding of peptide self-aggregation w…
The homodinuclear [ClM(mu-dppm)(2)MCl] complexes 1 (M = Pd) and 2 (M = Pt) react with RNC ligands (R = Ph, xylyl, p-tolyl, p-C(6)H(4)iPr) to provide the A-frame [ClPd(mu-dppm)(2)(mu-C=N-R)PdCl] (R = Ph (5a), xylyl (5b)), [ClPt(mu-dppm)(2)(mu-C=N-R)PtCl] (R = p-tolyl (4a); p-C(6)H(4)iPr (4b)), and the d(9)-d(9) M(2)-bo…
A polarizer-free three step switch using distinct dye-doped liquid crystal (LC) gels is demonstrated in reflective mode. By controlling the spatial distribution of the density of polymer networks, the distinct dye-doped LC gels can produce multiple states: bright, dark, and information states without patterning indium…
The role of tetradecyltrimethylammonium bromide (TTAB) and its partition between water, chloroform, and the chloroform/water interface during the miniemulsification of a photoluminescent polymer was investigated by indirect interfacial tension/elasticity measurements. Dynamic interfacial tension and elasticity measure…
The LiBH4+MgH2 system has great potential for hydrogen vehicle applications. In this study, the reported solid-state hydrogenation system made of LiH+1/2MgB2 has been investigated using ultrahigh field nuclear magnetic resonance spectroscopy. It is found that Mg–Li ion exchange occurs within MgB2 during ball milling t…
Abstract The surface modification by atmospheric pressure barrier discharge is effective in the improvement of adhesion performance of plastics. Remote plasma processing has several advantages over direct plasma processing. It is free from the problem of surface damage and charge accumulation and has larger freedom of…
Gold-bound self-assembled monolayers (SAMs) terminating in β-cyclodextrin (β-CD) cavities provide a highly ordered surface array of hydrophobic binding pockets and so are used as “molecular printboards” for nanopatterning applications. The present work complements ongoing nanoscale experiments by providing the atom-sc…
High thermal conductivity and high surface to volume ratios of nanostructures such as carbon nanotubes and metallic nanowires make them great candidates as micro/nano-fins and thus a potential solution to the ever-increasing thermal management challenges in electronics and photonics. With sizes ranging in the order of…
The synthesis of a new copper(III) complex with aliphatic carboxamido-N and thiolato-S donors is reported. This complex was thoroughly characterized by 1H NMR, UV–Vis spectroscopy, and cyclic voltammetry, as well as by single crystal X-ray crystallography. The copper(III) state in this complex is more stabilized than…
Abstract Zunehmend finden Nanopartikel im Bereich Leichtbau sowie der Luft‐ und Raumfahrttechnik Anwendung, um die mechanischen und thermischen Eigenschaften von Verbundwerkstoffen einzustellen und zu verbessern. Die Nanopartikel werden dabei meist durch Pyrolyse direkt als trockenes Pulver oder durch Fällung mit ansc…
We study the structural stability of the singly and doubly charged (positively and negatively) Si-doped heterofullerene ${\text{C}}_{30}{\text{Si}}_{30}$ via density-functional theory calculations combined with first-principles molecular dynamics. Geometry optimization aimed at establishing the most stable configurati…
The detailed isomerization and dissociation reaction potential energy profile of the CH(3)PO(2) system was established at the UCCSD(T)/6-311++G(3df,2p)//UB3LYP/6-311++G(d,p) level of theory. Seventy minimum isomers were located and connected by 93 optimized interconversion transition states. Furthermore, 32 isomers wi…
The field of Tissue Engineering has experienced exponential growth since its inception a little more than 20 years ago. In 1987, a small number of bioengineers were invited by the US National Science Foundation (yours truly was fortunate enough to be included) to discuss an emerging concept of combining biology and en…
We report superconductivity in Mg-doped InN grown by molecular beam epitaxy. Superconductivity phase transition temperature occurs Tc=3.97 K as determined by magnetoresistance and Hall resistance measurements. The two-dimensional (2D) carrier density of the measured sample is n2D=9×1014 cm−2 corresponding to a three-d…