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Enhanced Field Emission from Argon Plasma-Treated Ultra-sharp α-Fe2O3Nanoflakes

Z Zheng1, L Liao1, B Yan1, JX Zhang2, Hao Gong2, ZX Shen1 and T Yu1*

Author affiliations

1 Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore

2 Department of Materials Science and Engineering, National University of Singapore, Blk E3A, 9 Engineering Drive 1, 117576, Singapore, Singapore

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Citation and License

Nanoscale Research Letters 2009, 4:1115-1119  doi:10.1007/s11671-009-9363-1

Published: 12 June 2009


Hematite nanoflakes have been synthesized by a simple heat oxide method and further treated by Argon plasmas. The effects of Argon plasma on the morphology and crystal structures of nanoflakes were investigated. Significant enhancement of field-induced electron emission from the plasma-treated nanoflakes was observed. The transmission electron microscopy investigation shows that the plasma treatment effectively removes amorphous coating and creates plenty of sub-tips at the surface of the nanoflakes, which are believed to contribute the enhancement of emission. This work suggests that plasma treatment technique could be a direct means to improve field-emission properties of nanostructures.

Field emission; Metal oxide; Plasma treated