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Generation of Silicon Nanocolumns by Nanosecond Pulsed-Excimer Laser Irradiation and Their Field Emission Properties

Published online by Cambridge University Press:  11 February 2011

Yingfeng Guan ,
A. J. Pedraza ,
E. D. Ellis  and
L. R. Baylor
Yingfeng Guan
Affiliation:
Dept. of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996
A. J. Pedraza
Affiliation:
Dept. of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996
E. D. Ellis
Affiliation:
Dept. of Electrical and Computer Eng., The University of Tennessee, Knoxville, TN 37996
L. R. Baylor
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
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Abstract

Laser-generated silicon microcone arrays were used as templates for the growth of nanocolumns using laser irradiation as well. The formation mechanism of the microstructure is briefly reviewed, and the origin and growth of nanocolumns are discussed. The formation mechanism of nanocolumns requires highly localized melting, which explains why they fail to form on a flat surface but can grow atop the microcones. Field emission properties from both microcolumns and nanocolumns have been measured. The high aspect ratio (height/tip radius) of nanocolumns makes them suitable for various field emission applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 737 , 2002 , F8.42
Copyright
Copyright © Materials Research Society 2003

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References

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