| 학회 |
한국화학공학회 |
| 학술대회 |
2008년 봄 (04/23 ~ 04/25, 제주ICC) |
| 권호 |
14권 1호, p.1260 |
| 발표분야 |
재료 |
| 제목 |
Non-catalytically grown ZnO nanostructures: Structural, optical and field emission properties |
| 초록 |
The structural, optical and field-emission properties of non-catalytically grown ZnO nanostructures, i.e. aligned single-crystalline ZnO nanorods and flower-shaped structures, have been examined in this paper. By extensive structural characterizations, it was confirmed that the as-grown ZnO 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 from the as-grown ZnO nanostructures which confirm the wurtzite hexagonal phase for the as-grown nanostructures. The room-temperature PL spectra exhibited a strong ultraviolet emission confirming the good optical properties for the as-grown products. The field emission characterization 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 |
Umar Ahmad, 김상훈, 모하메드바즘, 박용규, 김진환, 김정현, 한윤봉
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| 소속 |
전북대 |
| 키워드 |
Non-catalytical; ZnO nanostructures; optical and field emission properties
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| E-Mail |
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| 원문파일 |
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