Xu, Meng Ku, Kang Hee Lee, Young Jun Shin, Jaeman J. Kim, Eun Ji Jang, Se Gyu Yun, Hongseok Kim, Bumjoon J. 2024-01-19T17:02:20Z 2024-01-19T17:02:20Z 2021-09-02 2020-08 0897-4756 https://pubs.kist.re.kr/handle/201004/118333 Hybrid organic/inorganic systems with modulated nanostructures and well-defined morphologies are of great importance to develop novel nanomaterials with tailored functionalities. Herein, we report the tunable assemblies of polystyrene-grafted Au nanoparticles (Au@PS NPs) within onion-like particles of polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP), controlled by the molecular weight (M-n) of PS ligands. Coassembly of Au@PS and PS-b-P4VP through solvent-evaporative emulsions exhibits dramatic morphological changes in the NP assemblies depending on the M-n of PS ligands: (1) addition of low M-n (1.8 kg mol(-1)) Au@PS creates crusted onion-like hybrid particles with well-ordered hexagonal NP superlattices covering their surface; (2) in contrast, high M-n (6.4 kg mol(-1)) Au@PS segregate at PS domains of the block copolymer particles. Interestingly, these NPs form a hexagonal packing structure at the center of the PS domains, producing concentric lamellar particles with hierarchically stacked Au@PS in an alternate-layered onion-like structure. Finally, cryogenic electron microscopy analysis is conducted to probe the entropy-driven mechanism of the formation of these hybrid particles. These initial demonstrations of multicomponent hybrid particles with targeted spatial alignments offer new strategies to design complex nanomaterials with tailorable properties for potential technological applications. English American Chemical Society Entropy-Driven Assembly of Nanoparticles within Emulsion-Evaporative Block Copolymer Particles: Crusted, Seeded, and Alternate-Layered Onions Article 10.1021/acs.chemmater.0c02459 1 Chemistry of Materials, v.32, no.16, pp.7036 - 7043 Chemistry of Materials 32 16 7036 7043 N scie scopus 000566337800025 2-s2.0-85092062271 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article POLYMER-GRAFTED NANOPARTICLES GOLD NANOPARTICLES AU NANOPARTICLES FACILE SYNTHESIS LOCATION SIZE TRANSITION BEHAVIOR DENSITY SHAPE block copolymer nanoparticle hexagonal packing sphere morphology transition