| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 |
13권 2호, p.2245 |
| 발표분야 |
재료 |
| 제목 |
Growth mechanism and Optical and Field Emission Properties of Aligned ZnO nanorods and Flower-Shaped Nanostructures Grown by Thermal Evaporation |
| 초록 |
Optical and field-emission properties of aligned ZnO nanorods and flower-shaped structures, grown onto aluminum and silicon substrates, by using non-catalytic thermal evaporation process, have been examined. The structural characterizations indicated that the as-grown nanostructures are single-crystalline with the wurtzite hexagonal phase and grown along the c-axis direction. Raman-scattering spectra show a strong and sharp optical-phonon E2 mode at 437 cm-1, in both the cases again confirming the wurtzite hexagonal phase for the as-grown nanostructures. The room-temperature PL spectra exhibited a strong ultraviolet emission, in both the cases, confirming the good optical properties for the as-grown products. The field emission properties of the as-grown aligned hexagonal nanorods shows that a turn-on field was 5.8 V/μm and the emission current density reached to 0.061 mA/cm2 at an applied electrical field of 9.0 V/µm and shows no saturation. The field enhancement factor ‘β’ was estimated, from the F-N plot, to be about ~2.081 × 103. |
| 저자 |
김상훈, Umar Ahmad, 모하메드 바즘, 박용규, 김진환, 김정현, 한윤봉
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| 소속 |
전북대 |
| 키워드 |
ZnO nanorods; Flower-Shaped Nanostructures; Optical and Field Emission Properties
|
| E-Mail |
|
| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
