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Catalyst-free growth of ZnO nanorods and their nanodevice applications

Cited 12 time in Web of Science Cited 11 time in Scopus
Authors

Park, Won Il; Kim, Dong-Wook; Jung, Sug Woo; Yi, Gyu-Chul

Issue Date
2006
Publisher
Inderscience
Citation
Int. J. Nanotechnology, Vol. 3, Nos. 2/3, 2006
Keywords
ZnO nanomaterialsnanorodsintegrated nanodevicesfield-effect transistorsFETSnanowiresbiological molecule sensorsSchottky diodeslight emitting devicescatalyst-free growthnanotechnologyKoreachemical vapour depositionCVDnanoscale devices
Abstract
We review recent research activities on catalyst-free growth of ZnO nanorods and their nanodevice applications. Since ZnO nanomaterials add excellent chemical sensing characteristics due to their large surface-to-volume ratio to intrinsic ZnO properties including semiconducting and piezoelectric properties, a wide direct band gap energy, and a large exciton binding energy, they are expected to become one of the most ideal materials for future high performance nanodevice applications. There have been extensive research activities for synthesis of high quality ZnO nanomaterials for nanodevice applications. Among the numerous growth methods, we have focused on catalyst-free metal-organic chemical vapor deposition, since this enables us to grow vertically aligned ZnO nanorods on various substrates, including Si and glass, without any special substrate treatment. This catalyst-free approach yields high purity and single crystalline nanostructures, and does not require a subsequent catalyst removal process. Furthermore, we established techniques for fabricating ZnO nanorod heterostructures with composition modulations along either radial or axial direction, which can provide more opportunities for novel optical and electronic device development. Furthermore, we briefly describe our activities on ZnO nanorod device fabrication and evaluation, including field-effect transistors, biological molecule sensors, Schottky diodes, and light emitting devices. We also address the remaining scientific issues and technical challenges, required to fully understand the device characteristics and to realise integrated nanodevices.
ISSN
1475-7435
Language
English
URI
http://www.inderscience.com/search/index.php?action=record&rec_id=9589

https://hdl.handle.net/10371/5484
DOI
https://doi.org/10.1504/IJNT.2006.009589
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