Dissociation of Single-Strand DNA: Single-Walled Carbon Nanotube Hybrids by Watson−Crick Base-Pairing

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• 作者：Seungwon Jung ; Misun Cha ; Jiyong Park ; Namjo Jeong ; Gunn Kim ; Changwon Park ; Jisoon Ihm ; Junghoon Lee
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：August 18, 2010
• 年：2010
• 卷：132
• 期：32
• 页码：10964-10966
• 全文大小：203K
• 年卷期：v.132,no.32(August 18, 2010)
• ISSN：1520-5126

文摘

It has been known that single-strand DNA wraps around a single-walled carbon nanotube (SWNT) by π-stacking. In this paper it is demonstrated that such DNA is dissociated from the SWNT by Watson−Crick base-pairing with a complementary sequence. Measurement of field effect transistor characteristics indicates a shift of the electrical properties as a result of this “unwrapping” event. We further confirm the suggested process through Raman spectroscopy and gel electrophoresis. Experimental results are verified in view of atomistic mechanisms with molecular dynamics simulations and binding energy analyses.