Title page for etd-0828111-204443


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URN etd-0828111-204443
Author Min-Hsuan Hong
Author's Email Address No Public.
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Department Electrical Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language English
Title Zinc Oxide Nanotip and Nanorod on Titanium Oxide Heterojunction Gas Sensor Prepared by Aqueous Solution Deposition
Date of Defense 2011-07-22
Page Count 71
Keyword
  • gas sensor
  • heterojunction
  • nanorod
  • nanotip
  • zinc oxide (ZnO)
  • aqueous solution deposition (ASD)
  • Abstract In this study, zinc oxide (ZnO) nanotip and nanorod were grown on glass substrate by aqueous solution deposition (ASD). Both characteristics of the two nanostructures were investigated. For fabrication of ZnO nanostructure UV photodetector, In-Zn inter-digitated metal electrode was evaporated on the top of the grown ZnO nanostructure to form the contact via. Compared with the common value (375 nm), both the peaks from the PL spectra of ZnO nanotip and nanorod are red-shifted (409 nm) due to the massive defects in nanotip and nanorod. In order to improve the photosensiblity, heterojunction of ZnO nanostructure/TiO2 film was prepared and were made into UV photodetector. Photoresponses of both nanotip and nanorod were improved after N2O annealing at 300oC. With the heterojunction of ZnO 1D nanostructure on TiO2 film, the photoresponses of both ZnO nanotip/TiO2 film can reach to 22.85, and the rise time and decay time are 40 and 82 seconds, respectively. On the other side, the photoresponses of both ZnO nanorod/TiO2 film can reach to 27.44, and the rise time and decay time are 22 and 133 seconds, respectively.
    Advisory Committee
  • Chung-Cheng Chang - chair
  • Yu-Hao Yang - co-chair
  • I-Kai Lo - co-chair
  • Ming-Kwei Lee - advisor
  • Files
  • etd-0828111-204443.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2011-08-28

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