title: Preparation of polymeric Janus particles by directional UV-induced reactions.
abstract: Polymeric Janus particles are obtained by UV-induced selective surface grafting polymerizations and coupling reactions, in virtue of the light-absorption of photoreactive materials such as the immobilized photoinitiator and spread photoinitiator solution on the surfaces exposed to UV light and the sheltering of densely arrayed immovable particles from light. Varying the monomers or macromolecules applied in photografting polymerization or coupling reaction, and choosing diverse polymeric particles of various size, bicolor and amphiphilic Janus particles could be successfully achieved. Observations by fluorescence microscope, scanning electron microscope ,and transmission electron microscope confirmed the asymmetrical morphology of the resultant Janus particles.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
authors.forename: Lianying
authors.initials: L
authors.lastname: Liu
authors.forename: Mingwei
authors.initials: M
authors.lastname: Ren
authors.forename: Wantai
authors.initials: W
authors.lastname: Yang
mesh_terms: D057927:Hydrophobic and Hydrophilic Interactions; D053768:Metal Nanoparticles / Q000737:chemistry; D008854:Microscopy, Electron; D008856:Microscopy, Fluorescence; D010777:Photochemistry; D011108:Polymers / Q000138:chemical synthesis* / Q000528:radiation effects*; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D011108:Polymers