In this paper we introduce an analytical approach to calculate the distribution of velocity of flow of the gas mixture, the concentration distributions of the growth component and temperature fields in the zone of deposition of semiconductor layers in chemical vapor deposition using a reaction chamber with a rotating disk substrate holder. The results of analysis of the temperature and concentr...

Nanowires are a promising structure to create new defect-free heterostructures and optoelectronic devices. GaP nanowires grown via the VLS mechanism using tertiary-butyl phosphine (TBP) trimethylgallium (TMGa) as precursors in an situ closed gas cell heating holder shown. This is model system investigate processes metal-organic vapour phase epitaxy (MOVPE). change their growth direction after r...

In order to understand the mechanism of chemical reactions based on catalytic effects, such as, hydrogen (de)absorption and oxidation on a metallic crystal, it is important to study the processes at the atomic level. In-situ transmission electron microscopy (TEM) at pressures (1-10 bar) of gas is expected to provide the most direct information. Such a pressure in combination with the high vacuu...

Abstract The performance of microfocus beamlines, and ultimately the quality diffraction data, is very sensitive to vibrations affecting optical elements sample stages holder. We report here strategies applied in design MX XAIRA beamline at ALBA synchrotron mitigate effects two relevant sources vibrations: circulation LN 2 flow evacuate thermal load on monochromator cryocooling gas stream being...

A novel MILP model for plantwide multiperiod optimization of byproduct gas supply system in the ironand steel-making process is proposed. Compared with the previous optimization model, proposed approach simultaneously optimizes the byproduct gasholder levels and gas distribution among con icting objectives. Both integer and continuous variables are used in determining the optimal fuel load cha...

The flame stability limit, which was involving the critical flow condition, lift off and blow out, could be affected by the burner geometry in the combustion system installation. Consequently a flame holder should be put in, to hold the flame as big as possible on a stable condition. The flame holder itself, is a device to hold the flame, whereas the flame holder could disturb the air and fuel ...