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Micromachines 2014, 5(4), 1069-1081; doi:10.3390/mi5041069

Growth of Ultra-Long ZnO Microtubes Using a Modified Vapor-Solid Setup

Department of Mechanical and Aerospace Engineering, University of Texas, Arlington, TX 76019, USA
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Received: 27 August 2014 / Revised: 4 November 2014 / Accepted: 6 November 2014 / Published: 11 November 2014
(This article belongs to the Special Issue Micro/Nano Fabrication)
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Abstract

In this work, we have modified the experimental setup for a vapor-solid (VS) process to synthesize Zinc oxide (ZnO) microtubes (MTs) with lengths up to 3 mm during a 90-min growth period. The critical idea behind this modification is to control the distribution of Zn vapor along the Si substrates. The morphology evolution of ZnO structures with the increasing reaction time was particularly explored. We found that, within the 90-min growth period, four different types of ZnO microstructures appeared in this synthesis process: microrods (MRs), short MTs, two-tier structures, and long MTs. Growth mechanisms were proposed to interpret the formation of these structures. View Full-Text
Keywords: ZnO; microtubes; vapor-solid process ZnO; microtubes; vapor-solid process
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lu, Z.; Heng, X.; Chakraborty, A.; Luo, C. Growth of Ultra-Long ZnO Microtubes Using a Modified Vapor-Solid Setup. Micromachines 2014, 5, 1069-1081.

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