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。
A lithography-friendly self-assembly process which multiplies and rectifies an existing resist patterns is demonstrated here. A polymer film (right figure) has assembled at a 14 nm half-pitch on a thin resist pattern at twice the period (left figure). This directed self-assembly process dramatically heals defects and…
Graphene-oxide (GO) flakes have been deposited to bridge the gap between two epitaxial-graphene electrodes to produce all-graphene devices. Electrical measurements indicate the presence of Schottky barriers at the graphene/graphene-oxide junctions, as a consequence of the band gap in GO. The barrier height is found to…
Porous carbon/Co nanocomposites were fabricated by a sol-gel method. The electromagnetic parameters were measured in the 2–18GHz range. Compared with porous carbon composite, porous carbon/Co nanocomposite has larger dielectric loss due to the enhanced interfacial polarization relaxation loss and Ohmic loss. The maxim…
The development of carbon nanotube-(CNTs-)based gas sensors and sensor arrays has attracted intensive research interest in the last several years because of their potential for the selective and rapid detection of various gaseous species by novel nanostructures integrated in miniature and low-power consuming electroni…
An acellular xenogeneic scaffold derived from the bovine vocal fold lamina propria has shown some promise for in vitro vocal fold tissue engineering. To further explore the potential of the scaffold for cellular attachment, migration, and infiltration, as well as the transport of oxygen, proteins, and nutrients in viv…
The concept of low-voltage depletion and accumulation of electron charge in semiconductors, utilized in field-effect transistors (FETs), is one of the cornerstones of current information processing technologies. Spintronics which is based on manipulating the collective state of electron spins in a ferromagnet provides…
Density functional calculations are performed to investigate the room temperature ferromagnetism in GaN:Cu nanowires (NWs). Our results indicate that two Cu dopants are most stable when they are near each other. Compared to bulk GaN:Cu, we find that magnetization and ferromagnetism in Cu doped NWs is strongly enhanced…
Ramsey et al. [Nature Phys. 4, 277-281 (2008)] report the observation of quantum interference associated with tunnelling trajectories between states of different total spin length in a dimeric molecular nanomagnet. They argue that the interference is a consequence of the unique characteristics of a molecular Mn12 whee…
Fluoridcluster von Lanthanoiden werden durch Metathese von Ln(SePh)3 mit NH4F in organischen Lösungsmitteln erhalten. Die ersten Produkte dieser Reaktionen, [(py)24Ln28F68(SePh)16] (Ln=Pr, Nd; py=Pyridin; siehe Struktur), sind die größten diskreten Lanthanoidcluster, die bislang isoliert wurden. In Emissionsexperiment…
Ein Booster für die Singulettsauerstoffemission: Mithilfe speziell entwickelter Gold-Nanoscheiben kann einer der unwahrscheinlichsten natürlichen Übergänge – die Relaxation von Singulettsauerstoff unter Lichtemission – deutlich verstärkt werden. Der Grund hierfür sind Wechselwirkungen mit lokalisierten Oberflächenplas…
Abstract The catalytic activity of Ir/WO3/SiO2 for the selective reduction of NO with CO (CO-SCR) in the presence of excess O2 was significantly increased by the presence of coexisting H2O, whereas NO reduction hardly occurred in the absence of H2O. Coexisting H2O plays an important role preventing catalyst deactivati…
The present investigation reports on a simple technique for the preparation of single‐phase MnFe 2 O 4 nanocrystalline powders using the polymerized complex method, starting from manganese carbonate and iron nitrate. A mixed aqueous solution with citric acid, ethylene glycol, Fe, and Mn ions was polymerized. The phase…
The applicability of Rayleigh‐Gans and quasi‐continuum scattering models to β‐quartz solid solution (s.s.) glass–ceramics was studied. We evaluated the validity of these models using two specimens with different microstructures. The refractive indices of the crystalline and glass phases of the specimens were calculate…
Of the most common cubic intermetallic structure types, several (MgCu(2), Cu(5)Zn(8), Ti(2)Ni, and alpha-Mn) have superstructures with unusual symmetry properties. These superstructures (Be(5)Au, Li(21)Si(5), Sm(11)Cd(45), and Mg(44)Ir(7)) have the unusual property of pairs of perpendicular pseudo fivefold axes, most…
Abstract A series of iron(III) complexes derived from a variety of pentadentate Schiff base ligands, namely salten [H 2 salten = bis(3‐salicylideneaminopropyl)amine] derivatives, have been synthesized and further used to stabilize and functionalize gold nanoparticles (Au‐NPs). The iron complexes have been specifically…
Eine Ex-situ-Synthese ergab katalytisch hoch aktive Palladiumnanopartikel. Sie wiesen ein enge Größenverteilung um 3.6 nm auf und fungierten nach der Immobilisierung auf einem Kohlenstoffträger (Gesamteffizienz 85 %), bei der sich Größe und Morphologie nicht änderten, als außergewöhnlich aktiver und selektiver Katalys…
A new method has been developed to discriminate between proteins with different isoelectric points by using fluorescent conjugated polyelectrolytes. Charged water-soluble polyfluorenes that contain 2,1,3-benzothiadiazole (BT) units demonstrate intramolecular energy transfer from the fluorene units to the BT sites when…
Abstract A diarylethene derivative, in which oxazole rings are attached to the ethene moiety at the 5-position, was synthesized, and its photochromic and fluorescent properties were examined. The derivative undergoes photochromism in solution and the open-ring isomer exhibits strong fluorescence. The fluorescence inte…
Abstract A facile and environmentally friendly synthesis method has been employed to prepare micron or submicron single‐crystal Bi 1– x La x FeO 3 with different particle shapes. Various forms of the crystallite are obtained, such as cubic, tetragonal, and semi‐sphere crystallites, by means of molten salt synthesis. T…
A new design of segmented‐in‐series solid oxide fuel cells (SOFCs) is presented in this paper. The small cone‐shaped anode tubes were fabricated by slip casting and the yttria‐stabilized zirconia (YSZ) electrolyte membranes were deposited onto the anode tubes by dip coating. After sintering at 1400°C for 4 h, a dense…