文献类型：期刊文献

英文题名：Hydrothermal synthesis of ZnO nanobundles controlled by PEO-PPO-PEO block copolymers

作者：Zhang, Zhiqing[1]; Mu, Jin[1]

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2007

卷号：307

期号：1

起止页码：79

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20070810438863);WOS:【SCI-EXPANDED(收录号:WOS:000243570400012)】；

语种：英文

外文关键词：ZnO; block copolymer; nanobundles; hydrothermal synthesis; photoluminescence

摘要：Homocentric ZnO nanobundles with pyramidlike and hexagonal prism shapes were synthesized in colloidal systems formed by PEO-PPO-PEO amphiphilic block copolymers. The prism- and pyramidlike ZnO crystals were produced by L64 and F68, respectively, which may be attributed to the different growth rates of various crystal facets. It was proposed that the two processes for crystallization, including nucleation and crystal growth, happened in the macromolecular micelles under hydrothermal conditions. The room-temperature photoluminescence spectra of the ZnO products showed sharp ultraviolet emission located around 390 nm originating from the radiative recombination of free excitons. The sharp emission, with a half-maximum of about 8 nm, gave a powerful attestation that the sample was of high crystal quality, which was consistent with the SEM and TEM observations. The single ultraviolet emission is important for the application of ZnO-based materials in the electronic and photonic realms. (c) 2006 Elsevier Inc. All rights reserved.