Anomaly in rotational diffusion of photophysical probe near volume phase transition of copoly(acrylamide-acrylic acid) gels: Steady state and time-resolved fluorescence study

Masahiko Annaka, Hiroyuki Takagi, Takayuki Nakahira

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Changes in the microenvironment of pyrene-labeled copoly(acrylamide-acrylic acid) gels are investigated by means of fluorescence spectroscopy. An anomaly in the microscopic motion of a pyrenyl probe was observed in the vicinity of the phase transition: the average lifetime of monomer emission approached zero, and the rotational diffusion constant of pyrenyl probe became infinite. Density fluctuation and the nonequilibrium situation near the phase transition are considered to cause the rapid microscopic fluctuation of the network and solvent molecule.

Original languageEnglish
Pages (from-to)L1439-L1442
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume38
Issue number12 A
DOIs
Publication statusPublished - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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