Abstract
Infrared absorption, temperature-dependent electrical resistance and magneto-resistance measurements of Bi nanowires (diameter <200 nm) prepared using the alumina-template method confirmed the existence of a semimetal–semiconductor phase transition. In this Letter, we report the synthesis of ∼10 nm diameter Bi nanorods using a pulsed laser vaporization method. The high-resolution transmission electron microscopy images of our Bi nanorods show a crystalline Bi core oriented along 〈0 1 2〉 direction, and coated with a thin amorphous Bi 2O 3 layer. The infrared absorption and the surface plasmon peaks in our Bi nanorods are blue-shifted in energy when compared to the corresponding spectra in bulk Bi.
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