Surface-Rolling Molecules
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- 作者：Yasuhiro Shirai ; Andrew J. Osgood ; Yuming Zhao ; Yuxing Yao ; Lionel Saudan ; Hanbiao Yang ; Chiu Yu-Hung ; Lawrence B. Alemany ; Takashi Sasaki ; Jean-Franç ; ois Morin ; Jason M. Guerrero ; Kevin F. Kell
- 刊名：Journal of the American Chemical Society
- 出版年：2006
- 出版时间：April 12, 2006
- 年：2006
- 卷：128
- 期：14
- 页码：4854 - 4864
- 全文大小：978K
- 年卷期：v.128,no.14(April 12, 2006)
- ISSN：1520-5126
文摘
Design, syntheses, and testing of new, fullerene-wheeled single molecular nanomachines, namely,nanocars and nanotrucks, are presented. These nanovehicles are composed of three basic componentsthat include spherical fullerene wheels, freely rotating alkynyl axles, and a molecular chassis. The use ofspherical wheels based on C60 and freely rotating axles based on alkynes permits directed nanoscalerolling of the molecular structure on gold surfaces. The rolling motion observed by STM resembles thesame motion performed by macroscopic entities in which rolling occurs perpendicular to the axles. A newsynthesis methodology, in situ ethynylation of fullerenes, was developed for the realization of the fullerene-wheeled molecular machines. Four generations of the fullerene-wheeled structures were developed, andthe latest fourth generation nanocar, 3b, along with three-wheeled triangular compounds, 4a and 4b, provideddefinitive evidence for fullerene-based wheel-like rolling motion, not stick-slip or sliding translation. Thestudies here underscore the ability to control directionality of motion in molecular-sized nanostructuresthrough precise molecular design and synthesis.