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단일벽 탄소 나노튜브의 흡광도 신호를 이용한 DNA 결합 측정
조승범(Chengfan Cao),윤도경(Dokyung Yoon),최재붕(Jae-Boong Choi),김영진(Young-Jin Kim),백승현(Seunghyun Baik) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Single walled carbon nanotubes(SWCNTs) can be applied for biomolecular sensors and/or markers due to their small size and excellent optical properties such as near infrared fluorescence and absorption. Here, we put out an optical biosensor using absorption signal of SWCNTs to detect DNA hybridization. SWCNTs exhibit sharp absorption peak distributions at different wavelengths when they exist in a well-dispersed solution state. It is found that DNA hybridization results in red peak shifts of nanotubes in the near infrared region. Compared to metallic species, semiconducting SWCNTs show manifest variations. The findings in this work make SWCNTs be used to selectively recognize various DNA interactions.