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Title of Journal: Appl Phys A

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Abbravation: Applied Physics A

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Springer-Verlag

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DOI

10.1007/bf00629649

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ISSN

1432-0630

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A twostep hydrothermally grown ZnO microtube arra

Authors: JX Wang XW Sun H Huang YC Lee OK Tan MB Yu GQ Lo DL Kwong
Publish Date: 2007/06/07
Volume: 88, Issue: 4, Pages: 611-615
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Abstract

Tubular ZnO microstructure arrays were fabricated on a large scale by a twostep hydrothermal method The porous ZnO tubular structures were then used to construct a gas sensor for CO detection The microtube array gas sensor showed sensitive response to different concentration of CO with an optimum temperature of 250 °C Because of the large surface to volume ratio the sensitivity of the microtube arrays was about twice of that of the ZnO rods Our results indicate that this simple twostep method for fabrication of largescale tubular microstructure arrays can be potentially used in gas sensor applications with improved performance

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