Au/CdS Hybrid Nanoparticles in Block Copolymer Micellar Shells

Haeng-Deog Koh; Mohammad Changez; Jae-Suk Lee

doi:10.1002/marc.201000214

Au/CdS Hybrid Nanoparticles in Block Copolymer Micellar Shells

Macromol Rapid Commun. 2010 Oct 18;31(20):1798-804. doi: 10.1002/marc.201000214.

Authors

Haeng-Deog Koh¹, Mohammad Changez, Jae-Suk Lee

Affiliation

¹ Department of Materials Science and Engineering, Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro (Oryong-dong), Buk-gu, Gwangju 500-712, Korea.

PMID: 21567596
DOI: 10.1002/marc.201000214

Abstract

A polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) micellar structure with a P2VP core containing 5 nm CdS nanoparticles (NPs) and a PS shell formed in toluene that is a good solvent for PS block undergoes the core-shell inversion by excess addition of methanol that is a good solvent for P2VP block. It leads to the formation of micellar shell-embedded CdS NPs in the methanol major phase. The spontaneous crystalline growth of Au NPs on the CdS surfaces positioned at micellar shells without a further reduction process is newly demonstrated. The nanostructure of Au/CdS/PS-b-P2VP hybrid NPs is confirmed by transmission electron microscopy, energy-dispersive X-ray, and UV-Vis absorption.