Materials Literature
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The photobehavior of carbon nanotubes (CNTs) has attracted great attention because of their unique cylinder structure and outstanding electrical properties. Much experimental progress toward nanotubes based photodetector has been reported. But it is still unclear whether the photoinduced conductivity change is caused…
Theoretical and experimental investigation is performed into the relation between plastic strain localizations of different scale in solids and the respective stress concentrators arising in the surface layer and at internal interfaces. It is found that localized plastic flow of any kind may form and propagate only un…
Dielectric surface flashover along insulators in atmospheric conditions has only been empirically characterized over the years. The underlying physics involved in atmospheric flashover has yet to be understood, where parameters such as background gas, humidity, surface roughness, and temporal characteristics of the ap…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
Abstract Co‐precipitation of proteins from whole cell extracts is a valuable approach to test for physical interactions between proteins of interest. It may be the method of choice, or may be used in conjunction with other procedures to detect protein‐protein interactions, such as two‐hybrid analyis and co‐purificatio…
Polycrystalline Si1−xMnx films codoped with boron have been prepared by radio-frequency magnetron sputtering deposition followed by post-thermal processing for crystallization. The polycrystalline thin films were treated by hydrogen plasma excited with approach of radio-frequency plasma-enhanced chemical vapor deposit…
This study examines the resistance change in conductive polypyrrole-coated PET fabrics under the AS 2001.4.15 – 1994 laundering test conditions. The effects of individual detergent components of a standard detergent, including auxiliary chemicals, at four different temperatures were studied. When the coated fabric was…
The stabilization of nano‐sized CuO suspensions was examined to look for the primary mechanism of dispersion. The dispersion stability of suspension was characterized by sedimentation tests, Zeta potential, granularity tests, and infrared spectroscopy (IR). Influence factors such as pH and the concentration of the dis…
Abstract Any dose rate instrument used to monitor environmental radiation must be characterized with respect to its response to secondary cosmic radiation and terrestrial radiation. This requires calibrations using different photon radiation fields, the measurement of the instruments internal background and the exposu…
Fabrication of Monodisperse Magnetic Fe<sub>3</sub>O<sub>4</sub>−SiO<sub>2</sub> Nanocomposites with Core−Shell\nStructures
A surprising slow down in the dielectric secondary γ-relaxation with temperature increasing near the glass transition is confirmed for several polypropylene glycols. The peculiar behavior diminishes as the molecular weight grows. The minimal model (Dyre and Olsen 2003 Phys. Rev. Lett. 91 155703) is applied successfull…
A new experimental setup has been developed to enable in situ studies of catalyst surfaces during chemical reactions by means of surface x-ray diffraction (SXRD) and grazing incidence small angle x-ray scattering. The x-ray reactor chamber was designed for both ultrahigh-vacuum (UHV) and reactive gas environments. A l…
In a two-step method, carbon nanotubes, inorganic nanowires, or graphene sheets are connected between two anchor points to form nanomaterial air bridges. First, a recently developed method of forming directionally oriented polymer nanofibers by hand-application is used to form suspended composite polymer-nanomaterial…
As a new technology, supercapacitor can attain greater energy density than those of conventional capacitors and greater power density than those of batteries. As a result, supercapacitors may become an attractive power solution for an increasing number of applications. In this paper, after a brief introduction of supe…
Al–N codoped zinc oxide films were prepared using a radio-frequency magnetron cosputtering system at room temperature. AlN and ZnO materials were employed as the cosputtered targets. The as-deposited cosputtered films at various theoretical atomic ratios [Al∕(Al+Zn)at.%] showed n-type conductive behavior in spite of t…
The structure of the amorphous perfluorinated polymer Teflon AF 2400 and other structurally close perfluoropolymers was studied by means of a quantum chemistry method. The electronic and structural characteristics of the repeating unit and polymer models with ten and nine monomer units were obtained. It was found that…
Abstract Summary : In this study, two different routes were chosen which are expected to influence the elongational viscosity and, thus, the foaming behavior of polypropylene (PP). Electron irradiation of a linear PP was performed at room temperature using different doses. Enhanced long‐chain branching was observed wi…
The crystal structure of parageorgbokiite, β-Cu 5 O 2 (SeO 3 ) 2 Cl 2 , a new mineral species from the fumaroles of the Great Fissure Tolbachik eruption, in the Kamchatka Peninsula, Russia, has been solved from single-crystal X-ray-diffraction data by direct methods and refined to R 1 = 0.032 for 1388 unique reflectio…
Radial-easy-magnetized Ni nanowire arrays have been fabricated by direct current (dc) electrodeposition in pores of anodic aluminum oxide (AAO) templates. The most probable length value of grains' long axes in nanowire is 7.5 nm. These small grains with random crystallographic direction are the main reason for Ni nano…
Abstract In this study, a comparison is made on the models available to predict the flexural modulus of structural polymer foams. Skin thickness and density profile in the core zone are taken into account to better relate foam morphology with mechanical response. It was found that including skin thickness is not suffi…