POS4-0125
DIRECTED ASSEMBLY OF LARGE-SIZED GOLD NANOPARTICLES BY BLOCK COPOLYMERS: FABRICATION AND PHOTOTHERMAL PROPERTIES
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Sep 30, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Heesuk KIM
Jinhye BAE
Presenter(s)
Haiying Huang (State Key Laboratory of Polymer Science and Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences)
Co-Author(s)
Abstract
The self-assembly of block copolymers (BCPs) has attracted significant interest for its capability to precisely control nanoparticle (NP) morphology and enhance functional performance in fields such as biomedicine, optoelectronics, and catalysis. Although extensive studies have been devoted to NP systems with feature sizes below 50 nm, the assembly behavior of larger nanoparticles (>100 nm) remains relatively unexplored. In this study, we present a detailed investigation into the co-assembly of poly(styrene-b-4-vinyl pyridine-b-ethylene oxide) (PS-b-P4VP-b-PEO) triblock copolymer micelles with large gold nanoparticles (>200 nm) synthesized via a seed growth approach. Through thermal annealing of micellar solutions, we successfully obtained monodisperse Au@PS-P4VP-PEO composite microspheres with a core–shell nanostructure, in which the gold nanoparticles are encapsulated by the triblock copolymer micelles. This approach was also successfully extended to poly(styrene-b-ethylene oxide) (PS-b-PEO) diblock copolymer micelles, demonstrating its versatility as a simple, efficient, and robust strategy for fabricating large-sized metal nanoparticle–polymer composites. The formation of stable core–shell nanostructures is attributed to a combination of interfacial interactions and conformational entropy effects. Additionally, we conducted a systematic evaluation of the photothermal properties of the gold nanoparticles before and after encapsulation.
