Temperature effect on the surface phase transitions of monolayer films of C12E1 at air/water interface

Surinder K. Mehta, Yosuke Imai, Hiroki Takumi, Kinue Shibata, Hiroyasu Sakamoto, Takanori Takiue, Hiroki Matsubara, Makoto Aratono

Research output: Contribution to journalArticlepeer-review


The temperature-dependent conformational states of a monolayer film of ethylene glycol monododecyl ether (C12E1) at the air/water interface have been investigated using ellipsometry, surface tension, external reflection-absorption FTIR spectroscopy and two-dimensional infrared (2DIR) correlation analysis. The ellipticity coefficients and the entropy associated with C12E1 adsorption changed almost discontinuously at certain temperatures, which manifested the interfacial phase transitions. The phase transition and coexistence of two phases were further clarified using 2DIR correlation analysis with temperature perturbation. The asynchronous correlation maps revealed that both bands of asymmetric and symmetric C-H stretching vibration in one-dimensional IR were split into two components, which confirmed the coexistence of two phases at the interface.

Original languageEnglish
Pages (from-to)2647-2652
Number of pages6
JournalColloid and Polymer Science
Issue number11
Publication statusPublished - Nov 2013

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry


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