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。
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…
Cyclic tensile and compressive deformation is applied to cellulose nanowhisker-epoxy resin based model nanocomposites. The molecular deformation of the cellulose nanowhiskers within the epoxy resin matrix is followed using a Raman spectroscopy technique, whereby shifts in the position of a band located at ∼ 1095 cm(-1…
The paper presents the analysis of the process of casting functionally graded composites under alternating electromagnetic field. The process utilizes the effect of electromagnetic buoyancy on nonconductive particles of the reinforcement in the conducting liquid (melted metal). The authors analyzed the possibilities o…
We report on the first demonstration of a fully suspended 10 m Fabry-Perot cavity incorporating a waveguide grating as the coupling mirror. The cavity was kept on resonance by reading out the length fluctuations via the Pound-Drever-Hall method and employing feedback to the laser frequency. From the achieved finesse o…
A novel technology has been developed for the synthesis of thioglycolic acid (TGA)-capped CdSe quantum dots (QDs) in aqueous medium. The reaction was carried out in air atmosphere with one-pot by using <TEX>$SeO_2$</TEX> to replace Se or <TEX>$Na_2Se$</TEX>. The technological parameters including refluxing time, pH va…
Liquid crystal (LC) lenses with a circularly hole-patterned electrode possess excellent characteristics in optical performance, especially for the capability of tunable focal lengths. But, non-uniformly symmetrical electric fields in LC lenses usually induce disclination lines when operating. In general, the occurrenc…
The carbon nanotube (CNT) is a unique form of carbon material. Since its discovery, CNT has been intensively studied due to its remarkable electrical, mechanical, thermal, and chemical properties (Iijima, 1991; Katz & Willner, 2004). Based on the structures and dimensions, CNTs can be divided into two groups: single-w…
Various diamonds were analyzed with photoluminescence (PL) spectra excited with synchrotron radiation in the wavelength range 160-250 nm. The emission of type IaAB diamond begins near 300 nm and extends to 700 nm; two broad lines with maximums about 419 and 469 nm correspond to energies 2.96 and 2.64 eV, respectively.…
We discuss the effect of disorder on the band gap measured in bilayer graphene in optical and transport experiments. By calculating the optical conductivity and density of states using a microscopic model in the presence of disorder, we demonstrate that the gap associated with transport experiments is smaller than tha…
Ultrastabile Schäume mit optimaler Schäumbarkeit sind mithilfe von Hydroxyfettsäure-Röhren zugänglich (siehe Bild). Die Stabilisierung ist die Folge der Adsorption von Monomeren an der Luft-Wasser-Grenzfläche und dem Vorliegen von Röhren in den Plateau-Grenzen. Beim Erwärmen gehen die Röhren in Micellen über, was zur…
Radar-absorption materials (RAM) have a growing and widespread applications in broadcasting and television, radar technology and microwave dark-room. In particular, in military applications, stealth weapons exhibit crucial effect in war. The research of RAM has been accelerating with the stealth technology and signifi…