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Bismuth quantum-wire arrays fabricated by a vacuum melting and pressure injection process

Published online by Cambridge University Press:  31 January 2011

Zhibo Zhang ,
Jackie Y. Ying  and
Mildred S. Dresselhaus
Zhibo Zhang
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307
Jackie Y. Ying
Affiliation:
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307
Mildred S. Dresselhaus
Affiliation:
Department of Electrical Engineering and Computer Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307

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Ultrafine bismuth nanowire arrays were synthesized by injecting its liquid melt into nanochannels of a porous anodic alumina template. A large area (1 cm × 1.5 cm) of parallel wires with diameters as small as 13 nm, lengths of 30–50 μm, and packing density as high as 7.1 × 1010 cm−2 has been fabricated. X-ray diffraction patterns revealed these nanowires, embedded in the insulating matrix, to be essentially single crystalline and highly oriented. The optical absorption spectra of the nanowire arrays indicate that these bismuth nanowires undergo a semimetal-to-semiconductor transition due to two-dimensional quantum confinement effects.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 7 , July 1998 , pp. 1745 - 1748
Copyright
Copyright © Materials Research Society 1998

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