Abstract
Photocurrent of a single-crystalline Si nanowire is investigated in this paper. Single-crystalline Si nanowires with amorphous <TEX>$SiO_2$</TEX> shells were first synthesized from ball-milled SiO powders by thermal chemical vapor deposition, and then the amorphous <TEX>$SiO_2$</TEX> shells were etched out from the as-synthesized Si nanowires. For a single-crystalline Si nanowire, photocurrent-voltage curves taken in air at room temperature were non-linear, and rapid photoresponses were observed when the light was switched on and off. The photocurrent was not changed in intensity under the illumination. Photocurrent mechanism in the single-crystalline Si nanowire is discussed in this paper.
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