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Generic nature of long-range repulsion mechanism on a bulk insulator?
- Source :
- Faraday Discussions; 2017, Vol. 204, p419-428, 10p
- Publication Year :
- 2017
-
Abstract
- Dynamic atomic force microscopy measurements are reported that provide evidence for the presence of long-range repulsion in molecular self-assembly on a bulk insulator surface. We present the structures formed from four different benzoic acid derivatives on the (10.4) cleavage plane of calcite kept in ultra-high vacuum. These molecules have in common that they self-assemble into molecular stripes when deposited onto the surface held at room temperature. For all molecules tested, a detailed analysis of the stripe-to-stripe distance distribution reveals a clear deviation from what would be expected for randomly placed, non-interacting stripes (i.e., geometric distribution). When excluding kinetic effects during growth, this result gives evidence for a long-range repulsion mechanism acting during the assembly of these stripes. The fact that this finding is robust against changes in the molecular structure indicates a generic nature of the observed mechanism, implying a ubiquitous origin such as electrostatic repulsion. Finally, we discuss parameters that might affect the unambiguous observation of this generic repulsion under specific experimental conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13596640
- Volume :
- 204
- Database :
- Complementary Index
- Journal :
- Faraday Discussions
- Publication Type :
- Academic Journal
- Accession number :
- 125881978
- Full Text :
- https://doi.org/10.1039/c7fd00089h