Temperature response of thermoresponsive polyethers immobilized on gold substrates

Sayaka Inoue, Naotaka Nakadan, Shin Ichiro Imabayashi, Masayoshi Watanabe

Research output: Contribution to conferencePaperpeer-review


Thermosensitive polymers that possess Lower Critical Solution Temperature (LCST) undergo a thermally induced reversible hydration-dehydration phase transition in aqueous solution. It has been known that the transition of polymer chain from coil to globule takes place in a narrow range of temperature. In this study, thermosensitive polyethers having thiol terminus was adsorbed onto a gold substrate through Au-S bonding. Water wetting properties of the polymer-adsorbed gold surface were observed by contact angle measurements with raising temperature, and a sharp increase in wettability occurred at 36°C. This result implies a collapse of the polymer chain on the substrate while increasing the surface temperature, turning out the surface to be more hydrophobic. Moreover, the temperature where the change in surface wettability was observed (Tw) increased with increasing the molecular weigh of polymer, suggesting that the effect of hydrophobic phenothiazine group on the polymer phase transition weakened as the molecular length had increased.

Original languageEnglish
Number of pages1
Publication statusPublished - 2005 Dec 1
Externally publishedYes
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: 2005 May 252005 May 27


Conference54th SPSJ Annual Meeting 2005


  • Contact angle
  • Monolayer
  • SAM
  • Surface modification
  • Thermosensitive polymers

ASJC Scopus subject areas

  • Engineering(all)


Dive into the research topics of 'Temperature response of thermoresponsive polyethers immobilized on gold substrates'. Together they form a unique fingerprint.

Cite this