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Issue 23, 2005
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Synthesis and gas sensing properties of ZnO single crystal flakes

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Abstract

We report a new two-dimensional structure, ZnO single crystal flakes, synthesized using a simple combustion CVD process. The flakes grew upward from the Si substrate. The as-grown ZnO flakes were less than 200 nm thick and 10–20 µm wide. Unlike most 1-D ZnO structures with [0001] growth direction, ZnO flakes grow along <10[1 with combining macron]0> directions. A gas sensor based on a 200 nm thick ZnO flake exhibited fast response–recovery and high sensitivity to ethanol vapor. These as-synthesized single crystal ZnO flakes could have important technological applications.

Graphical abstract: Synthesis and gas sensing properties of ZnO single crystal flakes

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Article information


Submitted
28 Feb 2005
Accepted
31 Mar 2005
First published
11 Apr 2005

J. Mater. Chem., 2005,15, 2316-2320
Article type
Paper

Synthesis and gas sensing properties of ZnO single crystal flakes

Y. Liu, J. Dong, P. J. Hesketh and M. Liu, J. Mater. Chem., 2005, 15, 2316
DOI: 10.1039/B502974K

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