title: Core-Corona Functionalization of Diblock Copolymer Micelles by Heterogeneous Metal Nanoparticles for Dual Modality in Chemical Reactions.
abstract: Nanoscale assemblies composed of different types of nanoparticles (NPs) can reveal interesting aspects about material properties beyond the functions of individual constituent NPs. This research direction may also represent current challenges in nanoscience toward practical applications. With respect to the assembling method, synthetic or biological nanostructures can be utilized to organize heterogeneous NPs in specific sites via chemical or physical interactions. However, those assembling methods often encounter uncontrollable particle aggregation or phase separation. In this study, we anticipated that the self-segregating properties of block copolymer micelles could be particularly useful for organizing heterogeneous NPs, because the presence of chemically distinct domains such as the core and the corona can facilitate the selective placement of constituent NPs in separate domains. Here, we simultaneously functionalized the core and the corona of micelles by Au NPs and Ag NPs, which exhibited plasmonic and catalytic functions, respectively. Our primary question is whether these plasmonic and catalytic functions can be combined in the assembled structures to engineer the kinetics of a model chemical reaction. To test this hypothesis, the catalytic reduction of 4-nitrophenol was selected to evaluate the collective properties of the micellar assemblies in a chemical reaction.
authors.forename: Seong Ho
authors.initials: SH
authors.lastname: Jo
authors.forename: Hyun Woo
authors.initials: HW
authors.lastname: Kim
authors.forename: Minkyung
authors.initials: M
authors.lastname: Song
authors.forename: Nam Jin
authors.initials: NJ
authors.lastname: Je
authors.affiliation: Department of Chemistry, Pukyong National University , 45 Yongso-ro, Nam-gu, Busan 608-739, Korea.
authors.forename: Sung-Hoon
authors.initials: SH
authors.lastname: Oh
authors.affiliation: Department of Chemistry, Pukyong National University , 45 Yongso-ro, Nam-gu, Busan 608-739, Korea.
authors.forename: Byoung-Yong
authors.initials: BY
authors.lastname: Chang
authors.affiliation: Department of Chemistry, Dong-A University , Nakdong-Daero 550beon-gil, Saha-gu, Busan 608-739, Korea.
authors.forename: Jinhwan
authors.initials: J
authors.lastname: Yoon
authors.forename: Joo Hyun
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Products Solution Research Group, Global R&D Center, POSCO , Songdo-dong, Yeonsu-gu, Incheon 406-840, Korea.
authors.forename: Bonghoon
authors.initials: B
authors.lastname: Chung
authors.forename: Seong Il
authors.initials: SI
authors.lastname: Yoo
mesh_terms: D000179:Acrylates / Q000737:chemistry; D002384:Catalysis; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008823:Micelles; D009596:Nitrophenols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D014466:Ultraviolet Rays
chemical_list: D000179:Acrylates; D008823:Micelles; D009596:Nitrophenols; D011108:Polymers; D011137:Polystyrenes; C509855:poly(styrene-b-acrylic acid); D012834:Silver; D006046:Gold; C024836:4-nitrophenol
keywords: assembly; catalyst; diblock copolymer; metal nanoparticle; micelle; surface plasmon