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。
Self-assembled MnN nanoislands have been prepared on Cu(001) substrate. The nanoislands show a square shape and a well-defined size. They are regularly arrayed with a periodicity of (3.5+/-0.1) nanometer and form a two-dimensional square superstructure. The MnN island superstructure is stabilized by a short-range mech…
An experimental search for nuclear fusion inside imploding bubbles of degassed deuterated acetone at 0 degrees C driven by a 15 atm sound field and seeded with a neutron generator reveals an upper bound that is a factor of 10 000 less than the signal reported by Taleyarkhan et al. The strength of our upper bound is li…
Self-assembly of functionalized nano building blocks (NBBs) is a promising avenue for 'bottom-up' nanomaterials design. Experimental studies on functionalized polyhedral oligomeric silsesquioxane (POSS) nanocubes have revealed a wide variety of nanostructures from their assemblies. Our previous simulation studies have…
A one-step method has been developed for synthesizing gold–polyaniline (Au@PANI) core–shell particles by using chlorauric acid (HAuCl 4 ) to oxidize aniline in the presence of acetic acid and Tween 40 at room temperature. SEM images indicated that the resulting core–shell particles were composed of submicrometre-scale…
Functionalization of carbon nanotubes is very challenging for their applications. The paper here describes a new method to functionalize multi-walled carbon nanotubes (MWCNTs) as specific affinity adsorbents. MWCNTs were acid purified and pretreated with (3-aminopropyl)-triethoxysilane (APTES) in order to introduce ab…
In the integrated circuit industry, aluminum-based interconnects and oxide interlayer dielectrics have been replaced with copper interconnects in a dual inlaid architecture and with low-K dielectrics. Inlaid Cu lines offer higher conductivity, improved electromigration performance and a reduced cost of manufacturing.…
The interfacial reaction layers in the Ti/ZrO 2 diffusion couples, isothermally annealed in argon at temperatures ranging from 1100° to 1550°C for 6 h, were characterized using scanning electron microscopy and transmission electron microscopy, both attached with an energy‐dispersive spectrometer. Very limited reaction…
We have characterized the structures of two kinds of catalytic nanoparticles of Pt and Pt–Ru, using anomalous small-angle X-ray scattering (ASAXS), anomalous wide-angle X-ray scattering (AWAXS) and extended X-ray absorption fine structure (EXAFS) spectroscopy. With several X-ray energies near the Pt LIII edge, the AWA…
A novel, fast, and cheaper method has been developed for the synthesis of fully cubic calcium‐stabilized zirconia (ZrO 2 ) of composition Ca 0.1 Zr 0.9 O 1.9 by dissolution of calcium oxide in monoclinic ZrO 2 for the first time using microwave energy. In this process, the precursors have been prepared by the mixed‐ox…
A comparison of the reactivity of chemisorbed oxygen with chemisorbed CO on Ru(109) and Ru(001) surfaces to produce CO 2 shows that the atomically stepped Ru(109) surface provides active oxygen species, whereas the Ru(001) surface is inactive. Using Auger spectroscopy and low-energy electron diffraction, it is found t…
The multilayer films of branched polyethyleneimine (BPEI) and poly(acrylic acid) (PAA) have been fabricated with the layer-by-layer (LbL) method. Two characteristic courses of the film thickness growth are observed, which are the initial exponential-like growth and the following linear growth. The variation of the COO…
A monolayer of 20 nm sized Fe3C nanoparticles encapsulated by graphite was fabricated by heat treating a polyimide/Fe/polyimide thin-film stack. Transmission electron microscopy and Raman spectroscopy confirmed the graphitization of the polyimide film in the vicinity of the Fe3C particles when annealed above 600 °C. C…
The effect of varying R =[CaO]/([CaO]+[Na 2 O]) ratio on the crystallization of a rare earth‐rich aluminoborosilicate glass (16 wt% RE 2 O 3 , RE=Nd or La) is investigated. The crystallization of a silicate apatite with Ca 2+ x RE 8− x (SiO 4 ) 6 O 2−0.5 x composition ( x ≈0.4–0.7), is responsible for a drop of the ra…
[reaction: see text] A novel cyclic tri-beta-peptide having terpyridine (tpy) metal ligands was synthesized to investigate its assembly formation and metal complexation. Microscopic observation revealed that this cyclic peptide formed a rod-shaped molecular assembly. The assembly was able to bind Cu(II) because the tp…
We present experimental results on the characterization of the mechanical properties of pyrolysed poly-furfuryl alcohol (PFA) nanofibres. Specifically, Young’s modulus and the fracture strain of the nanofibres were measured by performing uni-axial tensile experiments on individual nanofibres in situ in a scanning elec…
In recent years, major progress has been achieved in developing novel approaches to interpret small-angle scattering data from solutions of biological macromolecules in terms of three-dimensional models. These advanced methods include: ab initio low-resolution shape and domain structure determination; modelling of qua…
We have grown the charge-transfer salt of the electron acceptor 7,7,8,8-tetracyanoquinodimethane (TCNQ) and the electron donor tetracene using physical vapor transport. The crystal structure was solved by single-crystal X-ray diffraction and the symmetry was found to be triclinic (space group P 1̄). The 1:1 complex gr…
A novel, effective strategy named 'seed catalysis' has been described here to synthesize silver nanostructures with controllable morphology. Typically, we added Na 2 S into the reaction system and the Ag 2 S semiconductor colloids formed at the initial stage would act as both seeds and catalyst in the silver reduction…
Polyaniline (PANI) nanotubes were obtained by a self-assembly process, from a solution containing poly(methyl vinyl ether- alt -maleic acid) (PMVEA) by oxidative polymerization using ammonium persulfate as the oxidant. The size of the nanotubes was greatly affected by the weight ratio of polymeric acid to aniline as m…
Functionalized nanoporous alumina is applied in single-molecule fluorescence detection in nanoscale confinement (see schematic image). The confinement leads to apparent 1D diffusion with up to 19-fold prolonged diffusion times through the focus. Single-molecule fluorescence in porous alumina is a promising tool for th…