| 학회 | 한국재료학회 |
| 학술대회 | 2009년 가을 (11/05 ~ 11/06, 포항공과대학교) |
| 권호 | 15권 2호 |
| 발표분야 | B. Nanomaterilas Technology(나노소재 기술) |
| 제목 | Crystallographic Orientation Relationship between Growth Direction of Carbon Nanotubes and Fe Catalyst Produced by Chemical Vapor Deposition |
| 초록 | Carbon Nanotubes have attracted a wide interest since its discovery by S. Ijima in the early 1990s [1]. Since then, a variety of techniques such as arc discharge, laser ablation and chemical vapor deposition (CVD) have been adopted in the synthesis of carbon nanotubes. Even though the aforementioned synthesis techniques have their differences, they have one common feature: the utilization of a metal catalyst. Despite the fact that the presence of a metal catalyst is a necessity in the production of carbon nanotubes, the specific role played by the catalytic particles still remains unanswered [2]. The aim of this study is to investigate the morphological aspects of the catalytic particle, especially the existence of a crystallographic orientation relationship between the growth direction of carbon nanotubes and catalytic particles. The carbon nanotubes were produced by chemical vapor deposition. Acetylene (C2H2) was used as the gaseous carbon source and iron as the catalyst. Iron was deposited by e-beam evaporation on thermally grown silicon oxide. The produced carbon nanotubes were of multi-walled type with the catalytic particles observed at the tip and middle of the carbon nanotubes. The iron catalytic particles existed as either iron or iron carbide. The overall morphology of the catalytic particles was investigated by scanning electron microscopy (SEM). The crystallographic orientation relationship was determined by interpreting the selected area diffraction (SAD) patterns obtained by high resolution transmission electron microscopy (HRTEM). References [1] S. Ijima, Nature, 354, 56 (1991). [2] A.-C. Dupuis, Prog. In Mat. Sci., 50, 929 (2005). |
| 저자 | 박기훈, 장성욱, 김지홍, 권순주 |
| 소속 | 포항공과대 |
| 키워드 | Carbon Nanotube; Fe Catalyst; Crystallographic Orientation; CVD |
