Conversion of Zinc Oxide Nanobelts into Superlattice-Structured Nanohelices

Author:

Gao Pu Xian123,Ding Yong123,Mai Wenjie123,Hughes William L.123,Lao Changshi123,Wang Zhong Lin123

Affiliation:

1. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332–0245, USA.

2. College of Engineering, Peking University, Beijing, China.

3. National Center for Nanoscience and Technology of China, Beijing 100080, China.

Abstract

A previously unknown rigid helical structure of zinc oxide consisting of a superlattice-structured nanobelt was formed spontaneously in a vapor-solid growth process. Starting from a single-crystal stiff nanoribbon dominated by the c -plane polar surfaces, an abrupt structural transformation into the superlattice-structured nanobelt led to the formation of a uniform nanohelix due to a rigid lattice rotation or twisting. The nanohelix was made of two types of alternating and periodically distributed long crystal stripes, which were oriented with their c axes perpendicular to each other. The nanohelix terminated by transforming into a single-crystal nanobelt dominated by nonpolar ( \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(01{\bar{1}}0\) \end{document} ) surfaces. The nanohelix could be manipulated, and its elastic properties were measured, which suggests possible uses in electromechanically coupled sensors, transducers, and resonators.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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