Highly porous α-alumina powders prepared with the self-assembly of an asymmetric PS-b-PEO diblock copolymer

Abstract

Highly porous and abundantly crystallized alumina (Al₂O₃) powders, can be prepared using an asymmetric polystyrene-b-poly(ethylene oxide) (PS-b-PEO) diblock copolymer, which critically allowed solid-phase transition from γ- to α-Al₂O₃ in nanometer-scale as its high-temperature phase by suitable thermal treatment with a retention of PS-b-PEO templated porous structures.