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Title: | Comparative studies on the structure and electronic properties of carbon nanotubes prepared by the catalytic pyrolysis of CH4 and disproportionation of CO | Authors: | Chen, P. Wu, X. Lin, J. Li, H. Tan, K.L. |
Keywords: | A. Carbon nanotubes B. Pyrolysis C. TEM, XPS D. Electronic structure |
Issue Date: | 2000 | Citation: | Chen, P.,Wu, X.,Lin, J.,Li, H.,Tan, K.L. (2000). Comparative studies on the structure and electronic properties of carbon nanotubes prepared by the catalytic pyrolysis of CH4 and disproportionation of CO. Carbon 38 (1) : 139-143. ScholarBank@NUS Repository. | Abstract: | A new type of carbon nanotubes prepared by catalytic decomposition of CH4 (CH4-CNT) was studied and compared with carbon nanotubes derived from CO-disproportionation (CO-CNT) and graphite. HRTEM observation reveals that the structural graphene sheets are in a conical hollow shape for CH4-CNT but in a cylindrical shape for CO-CNT. The valence band structure of CH4-CNT is similar to that of CO-CNT but with a lower density-of-state of 2p-π valence electrons. Stronger plasma excitations and additional lower-energy transitions are observed for CH4-CNT by XPS investigations. A reduced work function and a more gradual Fermi edge for CH4-CNT are also detected by He I UPS. © 1999 Elsevier Science Ltd. All rights reserved. | Source Title: | Carbon | URI: | http://scholarbank.nus.edu.sg/handle/10635/96030 | ISSN: | 00086223 |
Appears in Collections: | Staff Publications |
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