상세정보
학술지
Work Function Engineering of SnO Single Crystal Microplates with Thermal Annealing
- 저자
- 도원희, 정우석, 이현수, 박종혁, 박정영
- 발행일
- 201608
- 출처
- Nanotechnology, v.27 no.33, pp.1-7
- ISSN
- 0957-4484
- 출판사
- Institute of Physics (IOP)
- 협약과제
- 16PB1400, 대면적 그래핀 기판을 이용한 저비용, 고품위의 III-V 나노와이어 발광소자 개발, 박종혁
- 초록
- We synthesized black SnO single-crystal microplates via a sonochemical process and engineered the work function of the SnO microplates using thermal treatments. The as-synthesized SnO microplates have a wide (001) plane, as is clearly evident from TEM images and diffraction patterns. Surface potential measurements on the SnO microplates show that the work function changes as the annealing temperature increases. The TEM and XAS results after thermal treatments imply that the micro-sized SnO(001) single-crystals are stable up to about 400 °C in air, after which the surface starts to become locally oxidized. Consequently, the long-range ordering and lattice parameter of the SnO(001) single crystals started to change to make polycrystalline SnO2 at about 600 °C. These results demonstrate the ability to tune the work function of the microplates and suggest an intriguing way to engineer the electrical properties of nanostructures.
- KSP 제안 키워드
- Annealing temperature, As-synthesized, Lattice parameter, Micro-sized, Single crystal, Sonochemical process, Surface Potential, Thermal annealing, Thermal treatments, Work function changes, diffraction pattern