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Indexed by:期刊论文

Date of Publication:2010-02-18

Journal:JOURNAL OF PHYSICAL CHEMISTRY C

Included Journals:SCIE、EI、Scopus

Volume:114

Issue:6

Page Number:2398-2402

ISSN No.:1932-7447

Abstract:The effect of gas-phase reactions on the growth of carbon nanotubes is investigated by a new synthesis method of infrared light local heating chemical vapor deposition where only the substrate can be heated. The simulation of temperature distributions surrounding the heated substrate shows that the region with high temperatures over 600 degrees C is enlarged with the increase of the substrate temperature. The expansion of the high-temperature region is speculated to result in the growth of carbon nanotubes at a substrate temperature of 770 degrees C and the successful growth of carbon nanotubes with a higher density at a higher temperature of 900 degrees C. It is analyzed that polymerization reactions of acetylene gas that occurred in the high-temperature region generate unsaturated carbon chains mainly comprising C4H4. These unsaturated carbon chains, in addition to the acetylene gas, with I high temperature should be important carbon sources for the growth of carbon nanotubes.