writer：Ying Xiao, Xiao-yan Wang, Thomas Wagner, Juergen Thiel, Yuan Yao, Yichao Lin, Ezzeldin Metwalli, Rui
keywords：nanostructure, morphology control
source：期刊
specific source：JOURNAL OF MATERIALS CHEMISTRY A
Issue time：2015年

A new method to synthesize hierarchical Eu203 nanostructures via a solvothermal process in N,N''''-dimethyl formamide (DMF) templated by an ionic amphiphilic diblock copolymer polystyrene-block-poly (methacrylic acid) (PS-b一PMAA) has been developed. By simply varying the mass ratio of HZO over DMF from 0 to 20 wt% in the polymer-salt mixed solution, a series of Eu203 morphologies including worm-like nanoparticles, nanoparticulate mesoporous microspheres, staggered sheets, and sheet-built microspheres are synthesized. The mechanism of the morphology control is the combined effect of both, guiding the europium salt in the PMAA domains  of  the  micro-phase  separated/self-assembled  PS-b-PMAA, and the hydrolysis一condensation process associated with the solvothermal treatment step.