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 chemical vapor deposition (CVD) method using local infrared laser heating is developed for synthesis of carbon nanotubes (CNTs) on suspending microstructures. Adjusting the laser power and the focused beam spot enables local illumination and heating of suspending microstructures to high temperature for CNT growth. R…
With the increasing use of molecular simulation to understand deformation mechanisms in transition metals, it is important to assess how well the simulations reproduce physical behavior both near equilibrium and under more extreme conditions. In particular, it is important to examine whether simulations predict unusua…
The sulfide-tellurides Ba(3)Cu(17-x)(S,Te)(11) and Ba(3)Cu(17-x)(S,Te)(11.5) were synthesized from the elements in stoichiometric ratios heated to 1073 K, followed by slow cooling to 873 K over 100 h. Ba(3)Cu(17-x)(S,Te)(11) is isostructural to Ba(3)Cu(17-x)(Se,Te)(11) when [S] > [Te], space group R ̅3m, with lattice…
The conductivity is calculated for dominant charged-impurity scattering in graphenes within a self-consistent Born approximation. In monolayer graphene, environmental dielectric screening is shown to change their effective potential from short to long range. In bilayer graphene, effects of band-gap opening due to asym…
In this paper we report electrochemical investigations of the influence of organic solvents dissolved in aqueous solution on the permeability of nanoporous films derived from a cylinder-forming polystyrene-poly(methyl methacrylate) diblock copolymer (CF-PS-b-PMMA). The nanoporous films (ca. 30 nm in pore diameter) wer…
Conjugated benzenoid aromatics with large inner cavities and alkyl side chains self-associate to produce dimers in solution and fibrous materials in the solid state. The self-association is enthalpically and entropically driven. The compound forms a 1:3 charge-transfer (CT) complex with 2,4,7-trinitrofluorenone (TNF)…
Poly(L-lactic acid) (PLA) samples prepared by hot pressing were treated by two different processes: process a—quenching of the molten specimens in water, then annealing at high temperatures; process b—direct crystallization at high temperatures from the molten specimens. The crystal modification and morphology of PLA…
Colloidal cadmium telluride (CdTe) quantum dots (QDs) and their nanoparticles have been synthesized by one pot sonochemical reactions under multibubble sonoluminescence (MBSL) conditions, which are quite mild and facile compared to other typical high temperature solution-based methods. For a typical reaction, <TEX>$Cd…
Carbon nanotubes (CNT) have been synthesized with various techniques of which the most common ones are laser ablation, electric arc discharge, and chemical vapor deposition. These methods produce CNTs with different characteristics, sometimes involving complex experimental setups that add to their cost of production.…
Chemically Bonded Ceramics (CBCs) have been extensively used many applications. These include: radiation shielding systems, nuclear waste solidification and encapsulation; high temperature structural applications; composites and biomedical applications. The objective of this chapter is to present the science, manufact…
The physical properties of the glass depend on the procedure used to produce the glass. In particular, if the glass is obtained through the variation of external thermodynamic parameters, the specific way in which the parameters are varied (thermodynamic history) has influence on the final properties. In this work, we…
The paper is concerned with the heat and sweat transport in porous textile media with complex phase changes, which is described as a non-isothermal, multi-phase and multi-component fluid flow and governed by a nonlinear, degenerate and strongly coupled parabolic system. The phase change, condensation/evaporation and f…
Carbon Nanotubes -From Research to Applications 244 composites with different nanotube concentrations and what changes are brought about by a rise in temperature.Concerning electrical transport, our data were analyzed by means of the percolation theory.Improvements in thermal transport characteristics present a partic…
E-mail: kshin@ssu.ac.krReceived May 11, 2011, Accepted May 27, 2011Key Words : Silver nanoparticles, Silver chloride, Poly(ethylenimine), Insoluble saltMetal nanoparticles have been intensely investigated inconjunction with their potential use in microelectronics,chemical sensors, data storage, and a host of other app…
Abstract The clathrate‐I phase Cs 8– x Ge 44+ y □ 2– y (space group Pm $\bar{3}$ n ) was prepared by high‐pressure high‐temperature reactions of Cs 4 Ge 4 and α‐Ge. Different reaction conditions were found to have a strong influence on the lattice parameter of the clathrate‐I phase ranging from 10.8070(2) Å to 10.8493…
Foam is a macroporous material and comes in many forms, such as polystyrene shock absorbers, dish-washing sponges, and foam board insulation. This chapter describes a technique to prepare foam materials from carbon nanotubes (CNTs). The use of a CNTmade foam as a kitchen sponge may not be a good idea, however. We of c…
Metal-ion-promoted electron transfer was observed for compounds 1 and 2 based on the absorption and ESR spectral studies. These results imply that spatially adjacent arrangement of TTF and quinone units in 1 and 2 due to the calix[4]arene platform is favorable for the intramolecular electron transfer.
When trigonal-bipyramidal clusters, [PPN][E(2)Mn(3)(CO)(9)] (E = S, Se), were treated with Cr(CO)(6) and PPNCl in a molar ratio of 1:1:2 or 1:2:2 in 4 M KOH/MeCN/MeOH solutions, mono-Cr(CO)(5)-incorporated HE(2)Mn(3)-complexes [PPN](2)[HE(2)Mn(3)Cr(CO)(14)] (E = S, [PPN](2)[1a]; Se, [PPN](2)[1b]), respectively, were f…
We analyze the low-energy properties of superconductors near the onset of accidental nodes, i.e., zeros of the gap function not enforced by symmetry. The existence of such nodes has been motivated by recent experiments, suggesting a transition between nodeless and nodal superconductivity in iron-based compounds. We fi…
Formation of thin films of CNTs is a necessary step to their fundamental study and use in applications. For the different fabrication techniques, how to control the tube density, the overall spatial layouts, their lengths, and their orientations must be understood, because these parameters significantly influence the…