Fast Fabrication of Nanoporous Anodic Alumina Membrane by Hard Anodization

하드애노디제이션에 의한 나노다공질 양극산화 알루미나 멤브레인의 제조

  • 하윤철 (한국전기연구원 재료응용연구본부) ;
  • 정대영 (한국전기연구원 재료응용연구본부)
  • Published : 2009.06.18

Abstract

Nanoporous anodic alumina membranes (NAAM) with high-density through-hole pores fabricated by hard anodization of aluminum in 0.3 M oxalic acid under the applied voltage of 40 (mild anodization), 80, 100, 120 and 140 V were investigated. The current-time responses monitored using a PC-controlled anodization cell and the corresponding pore structures attainable from field-enhanced scanning electron microscopy (FE-SEM) were analyzed in order to establish the optimum fabrication process. The nanoporous structure can be produced for all the voltage conditions, while the stabilized through-hole pore formation seems to occur at 40, 80 and 140 V. The growth rate under 140 V hard anodization was over 30 times higher than under 40 V mild anodization (1.5 um/hr).

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