Ordered indium-oxide nanowire arrays and their photoluminescence properties.

Ordered semiconductor In[sub 2]O[sub 3] nanowire arrays are uniformly assembled into hexagonally ordered nanochannels of anodic alumina membranes (AAMs) by electrodeposition and oxidizing methods. Their microstructures were characterized by x-ray diffraction, scanning electron microscopy, and transmission electron microscopy. A blue-green photoluminescence (PL) band in the wavelength range of 300–650 nm was observed in the In[sub 2]O[sub 3]/AAM assembly system. The PL intensity and peak position depend on the annealing temperature, which is mainly attributed to the singly ionized oxygen vacancy in the In[sub 2]O[sub 3] nanowire array system. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]