文献类型：期刊文献

英文题名：Spherical polyelectrolyte brushes as a nanoreactor for synthesis of ultrafine magnetic nanoparticles

作者：Zhu, Yan[1];Chen, Kaimin[1,2];Wang, Xiang[1];Guo, Xuhong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Med X Res Inst, Shanghai 200030, Peoples R China

年份：2012

卷号：23

期号：26

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20122615178022);WOS:【SCI-EXPANDED(收录号:WOS:000305411400009)】；

基金：The authors thank the NSFC (Grant 20774028), 111 Project (Grant B08021), the Fundamental Research Funds for the Central Universities, the Key Basic Research Project of Shanghai Science and Technology Commission (10JC1403800), the Scientific and Technological Project of Shanghai Science and Technology Commission (10111100103), and China Scholar Council for financial support.

语种：英文

外文关键词：Chemical stability - Crosslinking - Nanomagnetics - Synthesis (chemical) - Polyelectrolytes - Coprecipitation - Spheres

摘要：Ultrafine magnetic nanoparticles (MNP, 1.4-5.8 nm) were generated within a nanoreactor of spherical polyelectrolyte brushes (SPB). SPB consist of a solid polystyrene (PS) core and densely grafted poly(acrylic acid) (PAA) chains. Due to strong chemical coordination between carboxyl groups in PAA and MNP surfaces, the obtained magnetic spherical polyelectrolyte brushes (MSPB) kept excellent stability and maintained pH sensitivity. The magnetic properties of MSPB were confirmed by a vibrating sample magnetometer (VSM). The size and the size dispersion of MNP can be modulated by varying adding sequences (conventional coprecipitation or reverse coprecipitation), or nanoreactor structure (with or without crosslinking). MNP content in MSPB could be adjusted by multicycle reactions. This new strategy makes it possible to synthesize ultrafine inorganic nanoparticles with tunable size in SPB.