Terahertz Spectroscopy of Nanocrystal-Carbon Nanotube and Graphene Oxide Hybrid Nanostructures
탄소나노튜브와 산화그래핀의 나노구조물 혼합체의 테라헤르쯔 스펙트로스코피
- 주제(키워드) Graphene , Carbon Nanotube , Terahertz Spectroscopy
- 발행기관 고려대학교 대학원
- 지도교수 박정희
- 발행년도 2010
- 학위수여년월 2010. 8
- 학위구분 석사
- 학과 일반대학원 소재화학과
- 원문페이지 32 p
- 실제URI http://www.dcollection.net/handler/korea/000000024164
- 본문언어 영어
- 제출원본 000045608738
초록/요약
Terahertz (THz) spectroscopy was employed to study the optical/electrical properties of various nanocrystal (NC)-carbon nanotube (i.e., single-, double-, and multi-walled) and graphene oxide (GO) hybrid nanostructures. The power absorption and conductivity decrease in the order: single-walled (SWNT) > double-walled (DWNT) > multiwalled carbon nanotubes (MWNT) ≒ GO, showing a strong dependence on the crystallinity of the graphitic layers. The deposition of platinum (Pt), copper sulfide (Cu2S), and tin oxide (SnO2) NC reduced significantly the conductivity of the SWNT and DWNT, irrespective to the nature of the NC, but negligibly that of the MWNT and GO. X？Cray photoelectron and Raman spectroscopy analyses suggested that the conductivity of the NC hybrid nanostructures was mainly reduced by the electron trapping at the surface defects that formed during the in situ solvothermal growth of the NC. As the conductivity of the graphitic layers increases, such electron trapping effect becomes more significant.
more목차
1. Introduction
2. Experiment
3. Results and Discussion
4. Conclusions
5. References
6. Supporting Information
