Single-crystal nanorings formed by epitaxial self-coiling of polar nanobelts

被引：1403

作者：

Kong, XY ^{[1
]}

Ding, Y ^{[1
]}

Yang, R ^{[1
]}

Wang, ZL ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

SCIENCE | 2004年 / 303卷 / 5662期

关键词：

D O I：

10.1126/science.1092356

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：

Freestanding single-crystal complete nanorings of zinc oxide were formed via a spontaneous self-coiling process during the growth of polar nanobelts. The nanoring appeared to be initiated by circular folding of a nanobelt, caused by long-range electrostatic interaction. Coaxial and uniradial loop-by-loop winding of the nanobelt formed a complete ring. Short-range chemical bonding among the loops resulted in a single-crystal structure. The self-coiling is likely to be driven by minimizing the energy contributed by polar charges, surface area, and elastic deformation. Zinc oxide nanorings formed by self-coiling of nanobelts may be useful for investigating polar surface - induced growth processes, fundamental physics phenomena, and nanoscale devices.

引用

页码：1348 / 1351

页数：4