Surface & Interface Modeling
for Emerging Nanomaterials and Devices

Observation of structural and conductance transition of rotaxane molecules at a submolecular scale

Min Feng, Li Gao, Shixuan Du, Zhitao Deng, Zhihai Cheng, Wei Ji, Deqing Zhang, Xuefeng Guo, Xiao Lin, Lifeng Chi, Daoben Zhu, Harald Fuchs, and Hongjun Gao*

Institute of Physics, Chinese Academy of Sciences

Institute of Chemistry, Chinese Academy of Sciences

Physikalisches Institute/CeNTech, Universität Münster
Z. H. Cheng, W. Ji, Dr. X. Lin
Institute of Physics, Chinese Academy of Sciences
PO Box 603, Beijing 100080 (P.R. China)
Prof. D. Q. Zhang, Dr. X. F. Guo, Prof. D. B. Zhu
Institute of Chemistry, Chinese Academy of Sciences
Beijing 100080 (P.R. China)
Prof. L. F. Chi, Prof. H. Fuchs
Physikalisches Institute/CeNTech, Universität Münster
48149 Münster (Germany)

DOI:10.1002/adfm.200600973    Publication Date: 9 Feb 2007


Rotaxane molecules have attracted considerable interest because of their good performance in both molecular electronic devices and nanoscale data-storage media. Low-temperature scanning tunneling microscopy is used to investigate the structur and conductance of single H2 rotaxane molecules on a buffer-layered Au(111) substrate at 77 K. It is demonstrated that the conductance switching in rotaxane-based, solid-state devices is an inherent property of the rotaxane molecules. These results provide evidence that the conductance switching might arise from the movement of the cyclobis(paraquat-p-phenylene) ring along the rod section of the dumbbell-shaped backbone of the rotaxane molecule.


View: Adv. Funct. Mater.   17, 770–776 (2007)     Local Copy

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