NDLI: Controlling ZnO nanowire surface density during its growth by altering morphological properties of a ZnO buffer layer by UV laser irradiation

Content Provider	Springer Nature Link
Author	Shimogaki, Tetsuya Kawahara, Hirotaka Nakao, Shihomi Higashihata, Mitsuhiro Ikeue, Hiroshi Nakata, Yoshiki Nakamura, Daisuke Okada, Tatsuo
Copyright Year	2014
Abstract	Zinc oxide (ZnO) nanocrystals, which are characterized by their configurations and fine structures, are unique oxide semiconductors. In this report, it is demonstrated that the number density of ZnO nanowires can be controlled by proper treatments of the buffer layer with ultraviolet laser irradiation. ZnO nanowires were synthesized on the locally laser-irradiated ZnO buffer layer using nanoparticle-assisted pulsed-laser deposition (NAPLD). The number density of ZnO nanowires decreased in the region laser-irradiated with <300 mJ/cm2, whereas it increased in the region laser-irradiated with more than 400 mJ/cm2. Effects of laser irradiation on ZnO buffer layers were investigated by atomic force microscopy, Kelvin probe force microscopy (KPFM), Raman spectroscopy, and X-ray diffraction analyses. In particular, the effects of laser irradiation on the surface work functions of ZnO buffer layers were investigated by KPFM, which is reported for the first time. Additionally, periodically aligned ZnO sub-microcrystals were fabricated as an application of controlling the number density of ZnO nanowires on micropatterned ZnO buffer layers using the four-beam interfered third harmonic of a Nd:YAG laser followed by NAPLD. ZnO sub-microcrystals can be used to fabricate field emitter arrays and can be developed for the application of ZnO nano/microcrystals due to their high throughput.
Starting Page	1239
Ending Page	1246
Page Count	8
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	118
Issue Number	4
e-ISSN	14320630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-10-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condensed Matter Physics Optical and Electronic Materials Nanotechnology Characterization and Evaluation of Materials Surfaces and Interfaces, Thin Films Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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