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This study aims to reveal the effect of an Al buffer layer on the catalytic synthesis of carbon nanotube (CNT) forests. Thin films of Al buffer with thicknesses of 2, 5, 10, and 20 nm were deposited on copper, brass, stainless steel, Inconel® 600, silicon and alumina substrates under an Fe catalyst layer of 1 nm thickness. CNTs were synthesized from acetylene using hydrogen as a reducing gas at 660 °C...
Low temperature growth process of carbon nanotubes (CNTs) over bi-metallic (Co–Fe) and tri-metallic (Ni–Co–Fe) catalysts on Si/Al/Al2O3 substrates is carried out from acetylene precursor using hydrogen, ammonia or nitrogen as a carrier in a low pressure chemical vapor deposition system. Using the tri-metallic Ni–Co–Fe catalyst template, vertically aligned CNTs of ~700 nm length could be grown already...
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