Nanochannels Of Anodic Alumina Membranes Research Articles

Ordered indium-oxide nanowire arrays and their photoluminescence properties

Ordered semiconductor In2O3 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 In2O3/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 In2O3 nanowire array system.

Magnetic properties of ordered Fe xAg 1− x nanowire arrays embedded in anodic alumina membranes

Ordered Fe–Ag alloy nanowire arrays embedded in the nanochannels of anodic alumina membranes (AAM) were successfully fabricated by electrodeposition. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations reveal that the Fe–Ag alloy nanowires were uniformly assembled into the hexagonally ordered nanochannels of AAM. Magnetic measurements show that the perpendicular coercivity ( H C⊥) for the ordered Fe–Ag nanowire arrays embedded in AAM increased dramatically as the annealing temperature ( T A) rose from 300°C to 400°C, reached its maximum (239.5 Oe) at 400°C, and then decreased sharply as T A rose from 400°C to 600°C. However, there was no much change for the parallel coercivity ( H C∥). The mechanism of this phenomenon is discussed in this Letter.