中文摘要：

具有不对称双面结构的Janus粒子以其独特的性能，在乳液稳定、光学、生物传感、药物输送及电子学等领域具有潜在的应用前景．同时，胶体粒子能够在油水界面自组装，形成稳定的Pickering乳液．利用Pickering乳液作为模板，可以方便地制备有彬无机杂化超结构微胶囊和微球材料．

英文摘要：

＂Semi-decoration＂ of silica particles（so-called Janus particles） with polydimethylamino ethylmethacrylate（PDMAEMA） grafts was carried out using surface-initiated atom transfer radical polymerization（SI-ATRP） based on Pickering emulsion template.ATRP initiator-immobilized silica particles assembled at the interfaces of paraffin oil-in-water emulsions and an ultimately stable Pickering emulsion was formed.SI-ATRP of water-soluble monomer DMAEMA was conducted in the water phase of the Pickering emulsion from the outer side of silica nanoparticles.Janus particles were obtained.Ag nanoparticles absorbed onto the PDMAEMA region of silica particles could be observed by transmission electron microscopy（TEM） image which indicated that Janus particles were successfully prepared.The semi-decoration by SI-ATRP based on Pickering emulsion technique offers a new route to designing Janus particles.