Materials Literature
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The Raman scattering method is a noncontact and nondestructive method for film thermal conductivity measurement. However, the original Raman scattering method cannot calculate the thermal conductivity of thin transparent films with submicrometer- or nanometer-scale thickness. An analytical heat transfer model has been…
This work focuses on the high pressure Raman study of carbon nanostuctures comprising of singleor double-wall carbon nanotubes. The detailed examination of the Raman peaks, especially those attributed to the radial breathing modes of the carbon nanotubes, as a function of pressure provides a wealth of information conc…
Vulcanization accelerators are important for sulfur vulcanization. Sulfur vulcanization is performed by heating the rubber to which sulfur was added. But, it proceeds very slowly in the absence of a vulcanization accelerator, and the properties of the vulcanized rubber are inferior. Vulcanization accelerator promotes…
The increasing demand to remove all lead from potable water distribution systems has driven the development of nonleaded brass alloys. Three families of nonleaded brasses that contain < 0.25% lead by weight and have adequate mechanical properties, are now available for drinking water systems. Limited metals‐release…
The inhibition efficiency (IE) of CTAB - Zn 2+ system in controlling corrosion of carbon steel in well water has been evaluated by weight loss method. Enumeration of microorganisms from well water and biocidal efficiency of inhibitor system (CTAB-Zn 2+ ) were also determined by serial dilution technique and spread pla…
Due to the heavy calculation and low estimation precision with little signal-to-noise (SNR) of MUSIC (multiple signal classification) algorithm in partial discharge location used ultrasonic phased array, in this paper, a new location method is proposed based on root-multiple signal classification (Root-MUSIC). Firstly…
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009
Plastic zones around crack-tips in tungsten were characterised by electron backscatter diffraction (EBSD). Pre-cracks were made in ~1mm square cross section beams of pure single-crystal tungsten using a spark erosion method. The beams were loaded at different temperatures to a range of stress intensity factors below t…
Recently, the authors have shown that dielectric/metal composite nanowires exhibit very strong surface enhanced Raman (SERS) signals when arranged in a random three-dimensional geometry. Since they believe that the intersections of nanowires are critical in generating the high electric fields necessary for this enhanc…
Nowadays, It is easy to define optimal conditions (cryoprotective agent, speed and steps of freezing, speed of warming) for the cryopreservation of a homogeneous cell population or a one cell-layer tissue. Meanwhile, It is still hard to obtain cryopreservation of composite organs. Each tissue has its own requirements…
The local atomic structure of PbTiO3, BaTiO3, and KNbO3 perovskite-type crystals and K x Na1 − x NbO3 solid solutions in different phases is investigated using the angular dependence of the pre-edge structure of the Ti and Nb K X-ray absorption spectra and the EXAFS data. In noncubic phases, a considerable deviation o…
At present carbon nanotubes (CNT) are the most prospective cathode material for triode applications because of their strong field emission (FE) at low electric fields. The FE homogeneity of flat CNT cathodes, however, is still limited by their rather fast and uncontrolled growth which usually leads to strongly varying…
Solar cell grade crystalline silicon with very low reflectivity has been obtained by electrochemically selective erosion. The porous silicon (PS) structure with a mixture of nano- and micro-crystals shows good antireflection properties on the surface layer, which has potential for application in commercial silicon pho…
Microwave-assisted chemical bath deposition (MACBD) is an emerging technique for quick preparation of nanoscale and nanostructured particles. We report a simple and rapid process for synthesis of nanostructured ZnO particles by MACBD from aqueous solution of tetra ammonium zinc hydroxide. The effect of Zn+2 concentrat…
Structural foams are composed of two solid layers enclosing a foamed core. The application of sandwich structural foams has rapidly increased in the last decade. Injection moulding is currently used to produce these foams, being not common to produce conventional foams of similar densities and chemical compositions in…
For various types of ensembles of metal nanorods, the frequencies of longitudinal and transverse plasmons were calculated and correlations between the plasmon frequency shifts and the topology of nanorod arrays were found. The theoretical predictions were compared with the experimentally determined optical absorption…
Herein we show that a new amphiphilic poly(vinyl alcohol)-b-poly(acrylonitrile) block copolymer dispersed in water can be easily loaded with gold nanoparticles by addition of chlorauric acid followed by reduction by sodium borohydride. After deposition of the so-loaded micelles onto a silicon wafer, followed by an app…
The results of thermoelectric power (TEP), power factor and Seebeck coefficient of conducting polyaniline molybdenum trioxide (PANI/MoO 3 ) composites of different weight percentages (10, 20, 30, 40 and 50wt %) has been reported. The results are supported by the theory of coupled transport equations of heat and electr…
We have observed the influence of heat flux on the orientation of a nematic liquid crystal (NLC), which initially occurred in a homogeneously oriented state. The action of a spatially periodic heat flux leads to a change in the NLC director orientation, which is not accompanied by a hydrodynamic flow. The pattern obse…
Polycrystalline Fe100−xVx with x=0 to 14 at.% V films on a glass substrate were made by the dc magnetron sputtering method. The deposition temperature was 250 °C. The magnetic properties, i.e., saturation magnetization 4πMs, bulk-pinning field for a domain wall Hcw, coercive force Hc, initial permeability μi, maximum…