tellurium nanostructures have been prepared by physical vapor deposition method in a tube furnace. the experiments were carried out under argon gas flow at a pressure of 1 mbar. tellurium powder was evaporated by heating at 350°c and 430°c and was condensed on substrates at 110–250°c, in the downstream of argon gas flow. the products were characterized by field emission scanning electron micros...

in this research, tellurium (te) film with thicknesses of 100-250 nm were deposited on ceramic substrates by thermal evaporation at 373 k. the thickness of the film was determined by rutherford backscattering spectroscopy. the influence of the thickness on the structural, morphological and molecular bonds was characterized using xrd, scanning electron microscope, and raman spectroscopy. the xrd...

a simple method for fabrication of highly ordered gold nanorod film is introduced in this article. the procedure is based on thermal evaporation of gold into a porous anodic alumina film (paa). the ppa film was fabricated by combining the hard and mild anodization. this combination effectively decreases the processing time of fabrication of highly ordered porous anodic alumina film with control...

The conditions for disk evaporation by electron thermal conduction are examined, using a simplified semi–analytical 1-D model. The model is based on the mechanism proposed by Meyer & Meyer–Hofmeister (1994) in which an advection dominated accretion flow evaporates the top layers from the underlying disk by thermal conduction. The evaporation rate is calculated as a function of the density of th...

Lead selenide films are prepared by the vacuum evaporation technique on clean glass substrates held at room temperature in a vacuum 10 torr. The thickness of the film is measured by employing quartz crystal monitor technique. EDAX analysis confirms the composition of constituent in the PbSe thin films. The electrical resistivity measurements as a function of temperature in the range 303 K 483 K...

Nanostructuring of drug delivery systems offers many promising applications like precise control of dissolution and release kinetics, enhanced activities, flexibility in terms of surface coatings, integration into implants, designing the appropriate scaffolds or even integrating into microelectronic chips etc. for different desired applications. In general such kind of structuring is difficult ...

This paper analyzes the evaporation of WIMPS (weakly interacting massive particles) from the sun, both analytically and numerically. First an analytic approximation is made by defining an appropriate truncation of a Maxwell-Boltzmann distribution for the WIMPS and calculating the exact evaporation rate from this distribution due interaction with a truly thermal distribution of nuclei. Then, the...

To cope with the progressive tightening of the emission regulations, gasoline and diesel engines will continuously require highly improved exhaust after-treatment systems. In the case of diesel engines, the selective catalytic reduction (SCR) appears as one of the widely adopted technologies to reduce NOx (nitrogen oxides) emissions. Thereby, with the help of available heat from exhaust gas, th...

The contact formation on high efficiency solar cells using a high temperature process is the subject of this research. Thermal gravimetric analyses were used to study the chemical reactions between ink components and solar cell during the firing process. The mechanism behind the etching process and the opening of the dielectric layer are explained and the influence of the glass concentration on...

Heat pipes are heat transfer devices that enhances large amount of heat which works on the principle of evaporation and condensation of a working fluid. Inspite of wide application of heat pipe in microelectronics cooling system the trend of the chips performance and power utilization has been increased each year and a complete understanding of mechanism has not yet been completed even though i...