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Phase transition of iron inside carbon nanotubes under electron irradiation

Published online by Cambridge University Press:  03 March 2011

Hansoo Kim ,
Michael J. Kaufman  and
Wolfgang M. Sigmund
Hansoo Kim
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611
Michael J. Kaufman
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611
Wolfgang M. Sigmund*
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Selective encapsulation of different materials or phases of a material inside a carbon nanotube leads to controlling local properties of the nanotube. We report a method of synthesizing stable γ-Fe selectively inside a carbon nanotube by transforming α-Fe through electron irradiation in situ inside a transmission electron microscope. Therefore, this method enables a single nanotube to encase both high (γ-Fe) and low (α-Fe) temperature phases of iron simultaneously. γ-Fe produced by this method may be used as a novel catalyst, and its presence inside a carbon nanotube may affect the physical properties of the nanotube, which therefore can be used to modify the nanotube.

Keywords

Carbon nanotubesGamma ironTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 6 , June 2004 , pp. 1835 - 1839
Copyright
Copyright © Materials Research Society 2004

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