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。
Abstract We report on Förster‐type nonradiative resonance energy transfer (NRET) directed from colloidal quantum dots (QDs) to epitaxial quantum wells (QWs) with an efficiency of 69.6% at a rate of 1.527 ns –1 for potential application in III‐nitride based photovoltaics. This hybrid exciton generation–collection syste…
Single-site Re nanoparticles were produced by anchoring dirhenium organometallic clusters on to the inner walls of mesoporous silica. The presence of oxophilic atoms (Sb or Bi) is essential to obtain well dispersed Re(0) centers. The interaction between the organometallic cluster and the silica support is critical for…
The lowest-energy electronic excited states of ZnO quantum dots containing 1−3 Mn 2+ ions have been studied by time-dependent density functional theory. The calculations show that these excited states involve holes with predominantly manganese 3d character and electrons delocalized in conduction-band-like orbitals, co…
Carbon nanotubes were subjected to doping with an energetic Ag ion beam, and the carbon nanotubes on the top of the array were transformed into amorphous carbon nanowires with embedded Ag-nanoparticles. The field emission characteristics of these nanowires were investigated. The minimum turn-on and threshold fields we…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTAnisotropic Carbon Nanotube Films Fabricated from a Lyotropic Liquid-Crystalline PolymerKunihiko Okano*, Ikuyo Noguchi, and Takashi Yamashita*View Author Information Department of Pure and Applied Chemistry, Tokyo University of Scie…
Abstract In order to better understand the end of life scenario potential of poly(lactic acid) (PLA) packaging to reduce waste through composting when properly disposed, this study aimed to determine the rate at which 473 mL (16 oz) PLA bottles with and without associated high density polyethylene (HDPE) caps and poly…
Using two types of organic ligands having similar chemical structure but different physical properties and varying their dynamic population at the surface of zinc blende seed nanocrystals, self-assembled zinc blende semicircular-shaped bent nanowires of CdS are synthesized via a colloidal synthetic approach. It is fou…
A series of segmented multiblock copolymers containing aramid hard segments and extended polycaprolactone soft segments (with an Mn of 4,200 or 8,200 g mol–1) was prepared and tested for their shape-memory properties. Chain extenders were essential to raise the hard segment concentration so that an extended rubbery pl…
The influence of the optimized effective potential (OEP) and Coulomb-attenuation on shielding constants and chemical shifts is investigated for three disparate categories of molecule: main group, hydrogen bonded, and transition metal systems. Expanding the OEP in the orbital basis leads to physically sensible exchange…
Effects of the resonant interaction between an exciton in a semiconductor quantum well and localized plasmon excitations in a spherical metal nanoparticle are studied. The calculations show that (1) if the exciton energy level is lower than the energy of the plasmon, the exciton-plasmon interaction may result in the l…
We have successfully deposited epitaxial thin films of the Heusler alloy Co 2 FeSi on (1 0 0) cut SrTiO 3 single crystal substrates by pulsed laser deposition. X-ray diffraction reveals the L2 1 cubic crystal structure for the films grown at 400 and 600 °C, with a better crystallographic quality at the higher growth t…
To design efficient targeting strategies in magnetic resonance (MR) molecular imaging applications, the formation of supramolecular adducts between (strept)avidin ((S)Av) and tribiotinylated Gd-DOTA-monoamide complexes (DOTA=1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetic acid) was explored. Two compounds bas…
The 2000s have been characterized by an unprecedented exploration into research and development of nanotechnology and nanomaterials. Despite a slow start, new regulatory initiatives are popping up like mushrooms internationally. Many of these initiatives have yet to materialize themselves or are soft law initiatives,…
The magnetocrystalline anisotropy energy (MAE) of rare-earth transition-metal intermetallics ${R}_{2}{\text{Fe}}_{14}\text{B}$ ($R=\text{Nd}$, Gd, Y) was calculated by using the linear combination of pseudo-atomic-orbital method. Electronic structures were calculated by using relativistic density functional theory wit…
Abstract This communication defines the key existing technologies for reversible adhesion and bonded joint disassembly, and introduces the reader to early experimental findings on the use of thermally labile functional additives in an adhesive matrix. These additives have been found to induce localized, out of plane s…
The density relaxation phenomenon is modeled using both Monte Carlo and discrete element simulations to investigate the effects of regular taps applied to a vessel having a planar floor filled with monodisperse spheres. Results suggest the existence of a critical tap intensity which produces a maximum bulk solids frac…
Coarse-grained models of molecular interactions are of interest because they convey the essence of molecular interactions in simple and easy to understand form. However, coarse-grained models fail to adequately predict some material properties, such as the failure of the Stockmayer model to reproduce the dielectric be…
AIMS: This study aimed at isolating thermophilic bacteria that utilize cheap carbon substrates for the economically feasible production of poly(3-hydroxybutyrate), poly(3HB), at elevated temperatures. METHODS AND RESULTS: Thermophilic bacteria were enriched from an aerobic organic waste treatment plant in Germany, and…
Growth of amorphous carbon nanocoil (CNC) from acetylene on Si substrates was achieved by using nanosized Ag and K as the catalysts. The deposition of CNC was carried out inside a hot-wall reactor at 723 K using H2 as the carrier gas. Based on the observed results, we propose a cooperative bimetal catalyst enhanced va…
Abstract The unique self‐assembly behavior of the amphiphilicwheel‐shaped polyanion [{K(H 2 O)} 3 {Ru( p ‐cymene)(H 2 O)} 4 P 8 W 49 O 186 (H 2 O) 2 ] 27– ( 1 ) in binary mixed solvents of water and various organic solvents is reported. Polyanion 1 does not undergo supramolecular assembly formation in water/acetone so…