랭뮤어-블로제트 기법을 이용한 단일벽 탄소나노튜브 원자력 현미경 탐침의 제조
Fabrication of Single-Walled Carbon Nanotube AFM probe using Langmuir-Blodgett Technique
- 주제(키워드) Carbon nanotube , Atomic Force Microscopy , Langmuir-Blodgett technique
- 발행기관 아주대학교 대학원
- 지도교수 김재호
- 발행년도 2008
- 학위수여년월 2008. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 본문언어 영어
초록/요약
Carbon nanotube (CNT) tipped atomic force microscopy (AFM) probes have shown a significant potential for obtaining high resolution imaging of nanostructure and biological materials. In this paper we report a simple method to fabricate single-walled carbon nanotube (SWNT) nanoprobes for atomic force microscopy (AFM) using the Langmuir-Blodgett (LB) technique. Thiophenyl-modified SWNTs (SWNT-SHs) through amidation of SWNTs in chloroform allowed to be spread and form a stable Langmuir monolayer at the water/air interface. A simple two step transfer process was used: 1) dipping conventional AFM probes into the Langmuir monolayer and 2) lifting the probes from the water surface. This results in the attachment of SWNTs onto the tips of AFM nanoprobes. We found that the SWNTs assembled on the nanoprobes were well oriented and robust enough to maintain their shape and direction even after successive scans. AFM measurements of a nano-porous alumina substrate and deoxyribonucleic acid, using SWNT-modified nanoprobes revealed that the curvature diameter of the nanoprobes was less than 3 nm and a fine resolution than that obtained from conventional AFM probes. We also demonstrate that the LB method is a scalable process capable of simultaneously fabricating a large number of SWNT-modified nanoprobes.
more목차
Acknowledgements = i
Abstract = ii
Table of Contents = iii
List of Figures = vi
Ⅰ. Introduction = 1
Ⅱ. Chapter 1 = 11
Experimental Section = 11
Result and Discussion = 14
Ⅲ. Conclusions = 26
References = 27
