Abstract

PAULO, V. I. M.; NEVES-ARAUJO, J.  and  PADRON-HERNANDEZ, E.. Fast and Room-temperature Synthesis of Porous Alumina Films in Ultrasonic Assisted Bath Inducing Superficial Cavitations. Port. Electrochim. Acta [online]. 2019, vol.37, n.2, pp.123-129. ISSN 0872-1904.  https://doi.org/10.4152/pea.201902123.

We made a nano-porous alumina membrane by anodization under 40 V by two steps (10 minutes and 120 minutes) in oxalic acid, followed by chemical treatment in phosphoric acid assisted by an ultrasonic bath. Thus, we achieved a total relatively short time (3 h 30 min) for the synthesis, having all physicochemical processes been done at room temperature (25 °C). We verified a hexagonal arrangement structure with 56 nm inter-pore diameter, and density of 1010 pores/cm2, characteristic of the self-ordered porous alumina. Therefore, our membranes can be used as a template for fast synthesis of nanostructures as nanowires, nano-tubes.

Keywords : Porous alumina; rapid synthesis; room temperature process; ultrasonic bath.

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