作者：Wei Zhang, Xiaowei Si, Bin Liu, Guomin Bian, Yonglin Qi, Xinlin Yang*, and Chenxi Li
关键字：One dimensional nanochains; Distillation precipitation polymerization; Hollow mesoporous silica; Magnetic; Controlled drug release.
论文来源：期刊
具体来源：J. Colloid Interface Sci, 456 (1), 145-154 (2015). DOI: 10.1016/j.jcis.2015.06.028
发表时间：2015年

One-dimensional (1D) magnetic Fe₃O₄/P(MBAAm-co-MAA) nanochains were prepared by distillation-precipitation polymerization of MBAAm and MAA in the presence of Fe₃O₄ nanoparticles as building blocks under a magnetic heating stirrer, which played two critical roles: serving as magnetic field to induce the self-assembly of Fe₃O₄ nanoparticles into 1D nanochains and providing thermal energy to induce the polymerization of MAA and MBAAm on the surface of the Fe₃O₄ nanoparticles. The thickness of the P(MBAAm-co-MAA) layer can be easily tuned by adjusting the successive polymerization steps. The polymer layer that contained carboxyl groups was used as stabilizers for loading Ag nanoparticles and the reaction locus for deposition of outer silica layer via a sol-gel method in presence of C₁₈TMS as the pore directing agent for tri-layer nanochains. The corresponding hollow mesoporous silica nanochains with movable maghemite cores (γ-Fe₂O₃@mSiO₂) were produced after removal of the polymer mid-layer and the alkyl groups of the pore directing agent via calcination of the tri-layer nanochains at high temperature. The Fe₃O₄/P(MBAAm-co-MAA)/Ag nanochains exhibited a highly catalytic efficiency and well reusable property towards the reduction of nitrophenol. Furthermore, the γ-Fe₂O₃@mSiO₂ nanochains possessed hollow mesoporous structure and high specific surface area (197.2 m² g^-1) were used as a drug carrier, which displayed a controlled release property.