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Journal Article Work Function Engineering of SnO Single Crystal Microplates with Thermal Annealing
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Authors
Won Hui Doh, Wooseok Jeong, Hyunsoo Lee, Jonghyurk Park, Jeong Young Park
Issue Date
2016-08
Citation
Nanotechnology, v.27, no.33, pp.1-7
ISSN
0957-4484
Publisher
Institute of Physics (IOP)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1088/0957-4484/27/33/335603
Abstract
We synthesized black SnO single-crystal microplates via a sonochemical process and engineered the work function of the SnO microplates using thermal treatments. The as-synthesized SnO microplates have a wide (001) plane, as is clearly evident from TEM images and diffraction patterns. Surface potential measurements on the SnO microplates show that the work function changes as the annealing temperature increases. The TEM and XAS results after thermal treatments imply that the micro-sized SnO(001) single-crystals are stable up to about 400 °C in air, after which the surface starts to become locally oxidized. Consequently, the long-range ordering and lattice parameter of the SnO(001) single crystals started to change to make polycrystalline SnO2 at about 600 °C. These results demonstrate the ability to tune the work function of the microplates and suggest an intriguing way to engineer the electrical properties of nanostructures.
KSP Keywords
Annealing temperature, As-synthesized, Lattice parameter, Micro-sized, Single crystal, Sonochemical process, Surface Potential, Thermal annealing, Thermal treatments, Work function changes, diffraction pattern