title: Synthesis of Monodisperse Bi-Compartmentalized Amphiphilic Janus Microparticles for Tailored Assembly at the Oil-Water Interface.
abstract: Janus particles endowed with controlled anisotropies represent promising building blocks and assembly materials because of their asymmetric functionalities. Herein, we show that using the seeded monomer swelling and polymerization technique allows us to obtain bi-compartmentalized Janus microparticles that are generated depending on the phase miscibility of the poly (alkyl acrylate) chains against the polystyrene seed, thus minimizing the interfacial free energy. When tetradecyl acrylate is used, complete compartmentalization into two distinct bulbs can be achieved, while tuning the relative dimension ratio of compartmented bulb against the whole particle. Finally, we have demonstrated that selectively patching the silica nanoparticles onto one of the bulb surfaces gives amphiphilicity to the particles that can assemble at the oil-water interface with a designated level of adhesion, thus leading to development of a highly stable Pickering emulsion system.
authors.affiliation: Department of Bionano Technology, Hanyang University, Ansan, 15588, Republic of Korea.
authors.forename: Jeong Won
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of Bionano Technology, Hanyang University, Ansan, 15588, Republic of Korea.
authors.forename: Jangwoo
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Bionano Technology, Hanyang University, Ansan, 15588, Republic of Korea.
authors.forename: Jaehong
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Chemical Engineering, Kyung Hee University, Yongin, 17104, Republic of Korea. bjpark@khu.ac.kr.
authors.forename: Bum Jun
authors.initials: BJ
authors.lastname: Park
authors.affiliation: Amore-Pacific R&D Centre, Yongin, 17074, Republic of Korea.
authors.forename: Yong-Jin
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Amore-Pacific R&D Centre, Yongin, 17074, Republic of Korea.
authors.forename: Kyung-Ho
authors.initials: KH
authors.lastname: Choi
authors.affiliation: Department of Bionano Technology, Hanyang University, Ansan, 15588, Republic of Korea. kjwoong@hanyang.ac.kr.|Department of Applied Chemistry, Hanyang University, Ansan, 15588, Republic of Korea. kjwoong@hanyang.ac.kr.
authors.forename: Jin Woong
authors.initials: JW
authors.lastname: Kim
keywords: Janus microparticles; amphiphilicity; anisotropic phase properties; oil-water interfaces