| 학회 |
한국화학공학회 |
| 학술대회 |
2004년 가을 (10/29 ~ 10/30, 호서대학교(아산캠퍼스)) |
| 권호 |
10권 2호, p.2046 |
| 발표분야 |
재료 |
| 제목 |
Structural and optical properties of flower and needle-shaped ZnO nanostructures by ALD |
| 초록 |
A novel method, atomic layer deposition is employed to grow the needle and flower-shaped ZnO arrays at different growth temperatures. The needle shaped nanostructures were grown on the Au catalyzed Si(100) substrate while the flower-shaped was grown without metal catalyst on Si(100) substrate. The high density needle-shaped ZnO nanostructures were confirmed using the field emission electron microscopy. Investigations using the high resolution transmission electron microscopy and selected area electron diffraction patterns confirmed that the as-grown nanostructures are single crystalline with wurtzite hexagonal structure and preferentially oriented in the c-axis direction. Optical properties of these structures were measured at room temperature by photoluminescence spectroscopy. The needle-shaped and flower shaped nanostructures show a broad band in the visible region with suppressed UV emission. It is indicating that these nanostructures have structural defects (oxygen vacancies and zinc interstitials etc). |
| 저자 |
Umar Ahmad, 이 석, 김상훈, 라현욱, 한윤봉
|
| 소속 |
전북대 |
| 키워드 |
ZnO; nano structure; ALD
|
| E-Mail |
|
| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
