Cross-Step Place-Exchange of Oligo(phenylene−ethynylene) Molecules
- Amanda M. Moore
- ,
- Brent A. Mantooth
- ,
- Zachary J. Donhauser
- ,
- Francisco Maya
- ,
- David W. Price,
- ,
- Yuxing Yao
- ,
- James M. Tour
- , and
- Paul S. Weiss
Abstract

We have observed nitro-functionalized oligo(phenylene−ethynylene) molecules exhibiting motion up and down Au{111} substrate monatomic step edges within host self-assembled monolayers of n-alkanethiols, independent of previously observed conductance switching. Single molecules have been imaged with scanning tunneling microscopy to place-exchange reversibly between the top and bottom of monatomic substrate step edges.
†
The Pennsylvania State University.
‡
Current address: Geo-Centers, Research and Development Center, Manassas, VA 20110.
§
Current address: Department of Chemistry, Vassar College, Poughkeepsie, NY 12604.
‖
Rice University.
*
Corresponding authors. E-mail: [email protected], [email protected].
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