نتایج جستجو برای: chemical vapor synthesis

تعداد نتایج: 786932  

Journal: :Journal of the American Chemical Society 2003
Sreeram Vaddiraju Hari Chandrasekaran Mahendra K Sunkara

A concept is presented for synthesizing metal nanowires directly from the vapor phase using chemical vapor transport to temperatures higher than the corresponding metal oxide decomposition temperature. Specifically, this concept is demonstrated with the synthesis of tungsten metal nanowires with sizes ranging from 70 to 40 nm by increasing the condensation temperature. The simultaneous condensa...

Journal: :international journal of environmental research 2015
s. pourmand m. abdouss a. m. rashidi

nanoporous graphene which is used as nanosorbent was synthesized by chemical vapor deposition method via porous zinc oxide nanocatalyst. the reaction was carried out using methane as the carbon source and hydrogen as the carrier gas in a ratio of 4:1 at the temperature ranging 900-1050°c for 2-50 min. the product was characterized by scanning electron microscopy, transmission electron microscop...

2015
Haroon Ur Rashid Kaichao Yu Muhammad Naveed Umar Muhammad Naveed Anjum Khalid Khan Nasir Ahmad Muhammad Tariq Jan

The article describes significant role of catalyst in the deposition of various materials on different substrates surface via Chemical vapor deposition (CVD) process. CVD is a complex process of depositing thin coatings on a substrate surface via chemical reactions of gaseous materials. It is a useful process to produce materials of high purity, density and strength. It has emerged as a novel m...

Journal: :journal of physical & theoretical chemistry 2013
morrasa amani malkeshi karim zare

in this research, the effect of catalyst type on the cnts synthesis was investigated. the carbonnanotubes (cnts) were produced on stainless steel substrates and two of catalyst with differentcharacteristics by using thermal chemical vapor deposition (tcvd) method. the catalysts have theimportant role for the growth carbon nanotubes (cnts). acetylene gas (c2h2) diluted by nh3 wasused as the reac...

Karim Zare, Morrasa Amani Malkeshi

In this research, the effect of catalyst type on the CNTs synthesis was investigated. The carbonnanotubes (CNTs) were produced on stainless steel substrates and two of catalyst with differentcharacteristics by using Thermal chemical vapor deposition (TCVD) method. The catalysts have theimportant role for the growth carbon nanotubes (CNTs). Acetylene gas (C2H2) diluted by NH3 wasused as the reac...

Journal: :transport phenomena in nano and micro scales 2014
b. zahed t. fanaei s. a. behzadmehr h. ateshi

chemical vapor deposition (cvd) is one of the most popular methods for producing carbon nanotubes (cnts). the growth rate of cnts based on cvd technique is investigated by using a numerical model based on finite volume method. inlet gas mixture, including xylene as carbon source and mixture of argon and hydrogen as carrier gas enters into a horizontal cvd reactor at atmospheric pressure. in thi...

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