Single-DNA Molecule Nanomotor Regulated by Photons
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- 作者：Huaizhi Kang ; Haipeng Liu ; Joseph A. Phillips ; Zehui Cao ; Youngmi Kim ; Yan Chen ; Zunyi Yang ; Jianwei Li ; Weihong Tan
- 刊名：Nano Letters
- 出版年：2009
- 出版时间：July 8, 2009
- 年：2009
- 卷：9
- 期：7
- 页码：2690-2696
- 全文大小：217K
- 年卷期：v.9,no.7(July 8, 2009)
- ISSN：1530-6992
文摘
We report the design of a single-molecule nanomotor driven by photons. The nanomotor is a DNA hairpin-structured molecule incorporated with azobenzene moieties to facilitate reversible photocontrollable switching. Upon repeated UV−vis irradiation, this nanomotor displayed 40−50% open−close conversion efficiency. This type of nanomotor displays well-regulated responses and can be operated under mild conditions with no output of waste. In contrast to multiple-component DNA nanomachines, the intramolecular interaction in this single-molecule system offers unique concentration-independent motor functionality. Moreover, the hairpin structure of the motor backbone can significantly improve the efficiency of light-to-movement energy conversion. These results suggest that azobenzene-incorporated, hairpin-structured single-molecule DNA nanomotors have promising potential for applications which require highly efficient light-driven molecular motors.