A novel nanostructure with hexagonal-prism pores fabricated under vacuum circumstance

摘要: Abstract It is well known that electrochemical anodizations of valve metals are performed under the normal pressure (1 atm = 0.1 MPa), and only columnar pores could be usually obtained in porous anodic alumina (PAA). So far, there have been very few reports involving atmosphere its effect on nanostructure PAA. Here, a novel PAA with hexagonal-prism has successfully fabricated vacuum system (0.01 MPa), forming process clarified by anion-contaminated model oxygen bubble mold. The present results can provide unique insights into inherent relations between structural features anodizing parameters all process.