Spontaneous temperature control using reversible spectroscopic responses of PNIPAM-coated gold nanorods

Kohei Shimoda, Tsuyohiko Fujigaya, Naotoshi Nakashima, Yasuro Niidome

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Poly(N-isopropylacrylamide) (PNIPAM) was coated on gold nanorods (NRs) without forming aggregates. The PNIPAM-coated NRs (PNIPAM-NRs) formed aggregates at higher temperature than the lower critical solution temperature (LCST) of the PNIPAM layers. The aggregation showed reversible spectroscopic responses under repeated temperature cycles. When a PNIPAM-NR solution was irradiated with near-infrared (near-IR) light, the temperature increased and aggregates formed showing broad and weak surface plasmon bands. The spectroscopic responses in near-IR work as a negative feedback for heating a photoirradiated nanorod solution. The feedback offers spontaneous temperature control of the photoirradiated solution at the LCST of PNIPAM.

Original languageEnglish
Pages (from-to)1247-1249
Number of pages3
JournalChemistry Letters
Volume42
Issue number10
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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