| 학회 |
한국화학공학회 |
| 학술대회 |
2006년 가을 (10/27 ~ 10/28, 고려대학교) |
| 권호 |
12권 2호, p.2518 |
| 발표분야 |
재료 |
| 제목 |
Formation of hexagonal coaxial-shaped ZnO nanocolumns on steel alloy by thermal evaporation: Growth mechanism, Structural and Optical properties |
| 초록 |
Large-quantity synthesis of single crystalline with perfect hexagonal coaxial-shaped ZnO nanocolumns have been achieved, for the first time, on steel alloy substrate through the thermal evaporation of metallic zinc powder at low temperature of 490°C without the use of metal catalyst or additives. Detailed structural analyses confirm that the formed nanocolumns are exhibiting a wurtzite hexagonal phase and preferentially oriented in the c-axis direction. Presence of a sharp, strong and dominated optical-phonon Raman-active E2 mode in the Raman spectrum demonstrate that the grown products are good in crystal quality. In low temperature (LT) PL, the exciton emission bound to neutral donor (D0X) and free exciton (FX) dominated the edge emission region while the donor-acceptor pair (DAP) and its replica dominated the lower energy regions. With increased temperature D0X decreased abruptly and was then suppressed. With further increase in temperature the PL spectra was dominated by DAP. |
| 저자 |
Umar Ahmad, 김상훈, Q. Ahsanul Haq, 김진환, 박용규, J. C. Li, 한윤봉
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| 소속 |
전북대 |
| 키워드 |
hexagonal coaxial-shaped ZnO nanocolumns; steel alloy; thermal evaporation
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| E-Mail |
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| 원문파일 |
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