Please use this identifier to cite or link to this item:
|Title:||Efficient field emission from α- Fe2 O3 nanoflakes on an atomic force microscope tip|
|Authors:||Zhu, Y.W. |
|Citation:||Zhu, Y.W., Yu, T., Sow, C.H., Liu, Y.J., Wee, A.T.S., Xu, X.J., Lim, C.T., Thong, J.T.L. (2005-07-11). Efficient field emission from α- Fe2 O3 nanoflakes on an atomic force microscope tip. Applied Physics Letters 87 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.1991978|
|Abstract:||Aligned arrays of flake-shaped hematite (α- Fe2 O3) nanostructure have been fabricated on an atomic force microscope (AFM) tip. They are created by simply heating an iron-coated AFM tip in ambience on a hot plate. These nanoflakes are characterized as α- Fe2 O3 single crystalline structures with tip radii as small as several nanometers and are highly effective as electron field emitters. With a vacuum gap of about 150 μm, field emission measurements of α- Fe2 O3 nanoflakes on AFM tips show a low turn-on voltage of about 400-600 V and a high current density of 1.6 A cm-2 under 900 V. Such high emission current density is attributed to the nanoscale sharp tips of the as-grown nanoflakes. Based on the Fowler-Nordheim theory, it is demonstrated the enhancement factor of α- Fe2 O3 nanoflakes on AFM tips is comparable to that of carbon nanotubes. Our findings suggest that α- Fe2 O3 nanoflakes are potentially useful as candidates for future electron field emission devices. © 2005 American Institute of Physics.|
|Source Title:||Applied Physics Letters|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Nov 6, 2018
WEB OF SCIENCETM
checked on Oct 22, 2018
checked on Oct 20, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.