Abstract
Chalcopyrite CuInSe2 nanowire arrays have been prepared via a convenient one-step solution approach using porous anodic aluminium oxide (AAO) as a hard template. The as-prepared highly oriented CuInSe2 nanowires are uniform and single crystalline with a [112] growth direction. The diameter of the CuInSe2 nanowires is tunable and determined by the pore size in the AAO template. The structure, morphology, composition and optical absorption properties of the as-prepared CuInSe2 samples were characterized using X-ray powder diffraction, transmission electron microscopy, energy dispersive X-ray spectrometry, scanning electron microscopy and UV–Vis spectroscopy. A possible formation mechanism of the CuInS2 arrays is proposed. Homogeneous nucleation is believed to occur within AAO pores during the reaction and lead to the formation of single crystalline CuInSe2 nanowires.
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