Issue 44, 2015

Synthesis and optical properties of gold nanoparticle networks cross-linked with chain-length-controlled polymers

Abstract

In order to control the absorption band ascribed to localized surface plasmon resonance (LSPR) of gold nanoparticles (AuNPs) in solution, we newly synthesized a gold nanoparticle network (AuNP-NW) cross-linked with chain-length-controlled polymers. The chain-length-controlled polystyrene (poly(St)) having dithiobenzoate groups at both termini was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization with a novel RAFT agent which enables the precise control of the chain length of the polymers. Both terminal groups of poly(St) were reduced from dithiobenzoate groups to thiol groups. The AuNP-NW was prepared by the self-organized cross-linking of individual AuNPs with poly(St) having thiol groups at both termini. Transmission electron microscopy images and absorption spectra of the AuNP-NW indicate the presence of a network structure. The absorption band due to LSPR of the AuNP-NW could be changed by the precise control of the distance between the AuNPs.

Graphical abstract: Synthesis and optical properties of gold nanoparticle networks cross-linked with chain-length-controlled polymers

Supplementary files

Article information

Article type
Paper
Submitted
05 Feb 2015
Accepted
08 Apr 2015
First published
09 Apr 2015

RSC Adv., 2015,5, 34704-34708

Author version available

Synthesis and optical properties of gold nanoparticle networks cross-linked with chain-length-controlled polymers

E. Sugata and S. Kobatake, RSC Adv., 2015, 5, 34704 DOI: 10.1039/C5RA02264A

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