Self-organization of nano-lines and dots triggered by a local mechanical stimulus

被引:16
作者
Biscarini, Fabio
Cavallini, Massimiliano
Kshirsagar, Rajendra
Bottari, Giovanni
Leigh, David A.
Leon, Salvador
Zerbetto, Francesco
机构
[1] CNR, Ist Studio Mat Nanostrutturati, Sez Bologna, I-40129 Bologna, Italy
[2] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland
[3] Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
基金
英国工程与自然科学研究理事会;
关键词
bottom-up fabrication; dynamics; rotaxanes; surfaces;
D O I
10.1073/pnas.0605192103
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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 nano-structures depends on whether the mechanical stimulus acts along a 1 D 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.
引用
收藏
页码:17650 / 17654
页数:5
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