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Molecular-scale noncontact atomic force microscopy contrasts in topography and energy dissipation on c(4x2) superlattice structures of alkanethiol self-assembled monolayers
- Source :
- JOURNAL OF APPLIED PHYSICS. 95(3):1222-1226
- Publication Year :
- 2004
- Publisher :
- American Institute of Physics, 2004.
-
Abstract
- Alkanethiol self-assembledmonolayers formed on Au(111) surfaces were investigated by noncontact atomic force microscopy (NC-AFM). Dodecanethiol monolayers prepared at 78 °C were imaged by NC-AFM, which revealed that the film is composed predominantly of two different phases of c(4×2)superlattice structures. The obtained molecular-scale NC-AFM contrasts are discussed in comparison with previously reported scanning tunneling microscopy images. We found that the energy dissipation image exhibits a clear difference in its molecular-scale contrast between the two phases. Possible origins of the difference are discussed in relation to the fluctuation and/or stability of the packing structures.
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 95
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- JOURNAL OF APPLIED PHYSICS
- Accession number :
- edsair.dedup.wf.001..b3899db5ff8032952e49280c77bfe22f