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Title: Enhanced field emission of vertically aligned core-shelled carbon nanotubes with molybdenum oxide encapsulation
Authors: Yu, J.
Sow, C.H. 
Wee, A.T.S. 
Chua, D.H.C. 
Issue Date: 2009
Source: Yu, J., Sow, C.H., Wee, A.T.S., Chua, D.H.C. (2009). Enhanced field emission of vertically aligned core-shelled carbon nanotubes with molybdenum oxide encapsulation. Journal of Applied Physics 105 (11) : -. ScholarBank@NUS Repository.
Abstract: The field emission characteristics of the core-shelled nanostructures obtained by directly coating molybdenum oxide onto vertically aligned multiwalled carbon nanotubes (MWNTs) was investigated. A metal-organic chemical vapor deposition technique was used with Mo (CO) 6 as the precursor and films deposited at process temperatures of 200, 400, and 700 °C. X-ray photoelectron spectroscopy, scanning electron microscopy, and x-ray diffraction were used to study and understand the material properties of the deposited coatings. Enhanced field emission performance was observed for molybdenum oxide coated MWNT samples at 400 °C with a turn-on field of 1.33 V μm -1 and a field enhancement factor Β estimated to be ∼7000. The enhanced performance may be due to both the shape of the coated emitters and a decrease in the effective barrier height. © 2009 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.3139289
Appears in Collections:Staff Publications

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