1. Self-organization of nano-lines and dots triggered by a local mechanical stimulus.
- Author
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Biscarini, Fabio, Cavallini, Massimiliano, Kshirsagar, Rajendra, Bottari, Giovanni, Leigh, David A., León, Salvador, and Zerbetto, Francesco
- Subjects
- *
PERTURBATION theory , *THIN films , *MOLECULES , *NANOSTRUCTURES , *NUCLEATION , *BONDS (Finance) - Abstract
When a local mechanical perturbation is applied to the surface of a thin film of a mechanically interlocked molecule (a rotaxane), the molecules self-organize into periodic arrays of discrete dots or lines. The dimensionality of the nanostructures depends on whether the mechanical stimulus acts along a 1D line or over a 2D area. The size (50–500 nm) and periodicity (100–600 nm) of the patterns are controlled solely by the film thickness. This self- organization at the mesoscopic scale occurs via a nucleation-ripening mechanism eased by the relatively low energy barriers of the intramolecular rearrangement introduced by the mechanical bond. The phenomenon can be exploited as a bottom-up nano-fabrication method. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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