Journal
MICROMACHINES
Volume 5, Issue 4, Pages 1069-1081Publisher
MDPI
DOI: 10.3390/mi5041069
Keywords
ZnO; microtubes; vapor-solid process
Categories
Funding
- [NSF-CMMI-1030659]
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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.
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