title: The Role of Stress in the Self-Organized Growth of Porous Anodic Alumina.
abstract: Ridges and depressions were formed on the barrier layer during chemical and physical etching of porous anodic alumina (PAA) from the bottom side, indicating nonuniform etching rate around each cell. These behaviors cannot be explained solely by the well-known composition variation, but were in line with the hexagonal distribution of stress within the barrier layer of each cell. Such stress variation should be attributed to the interactions of neighboring cells undergoing volume expansion. These interactions could account for the self-organization of PAA.
authors.affiliation: Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Jinfu
authors.initials: J
authors.lastname: Liao
authors.affiliation: Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Ling
authors.affiliation: Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China.
authors.forename: Xing
authors.initials: X
authors.lastname: Hu
keywords: barrier layer etching; cell interaction; porous anodic alumina; self-organization; stress distribution