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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51583

Title: Characterization and enhanced field emission properties of IrO2-coated carbon nanotube bundle arrays
Authors: Y M Chen
C A Chen
Y S Huang
K Y Lee
K K Tiong
Contributors: 國立臺灣海洋大學:電機工程學系
Date: 2009-12
Issue Date: 2018-12-07T06:56:02Z
Publisher: Nanotechnology
Abstract: Abstract: Low operating electric field and stable emission current have been achieved in IrO2 nanocrystal-coated carbon nanotube bundle arrays (CNTBAs). Patterned vertically aligned CNTBAs were synthesized using thermal chemical vapor deposition followed by the deposition of IrO2 nanocrystals by reactive radio-frequency magnetron sputtering using an Ir target. The structural and spectroscopic properties were characterized by field emission scanning and transmission electron microscopy, and Raman spectroscopy. The current density versus electric field measurements yielded a low turn-on field of 0.7 V µm−1 at a current density of 0.1 µA cm−2, a low threshold field of 2.3 V µm−1 at a current density of 1 mA cm−2 and a high field enhancement factor of 1 × 104 for the IrO2-coated CNTBAs. Long-term stability was also demonstrated. The enhancement of field emission characteristics is attributed to the combined effects of the geometrical structure of the IrO2-coated CNTBAs, and the natural conducting and enhanced resistance to oxidation properties of IrO2.
Relation: 20(3)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51583
Appears in Collections:[電機工程學系] 期刊論文

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