期刊
NANO LETTERS
卷 11, 期 6, 页码 2280-2285出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl200473p
关键词
Bilayer; edge effects; bifurcation; doubly curved; self-folding; polypyrrole
类别
资金
- NSF-DMS [0810602]
- NSF-CNS [0931878]
- Maryland NanoCenter
- FabLab
- Division Of Computer and Network Systems
- Direct For Computer & Info Scie & Enginr [931878] Funding Source: National Science Foundation
- Division Of Mathematical Sciences
- Direct For Mathematical & Physical Scien [0810602] Funding Source: National Science Foundation
We elucidate the reason for preferential bending along the long edge in thin rectangular bilayers in which one of the layers is isotropically strained. While this preference has been observed previously, the physical basis for this preference has not been understood. We find that the bending direction is determined by the existence of doubly curved regions at the curled edges, which lower the energy. This energy difference between spiral and cigar shapes increases with aspect ratio.
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