Time- And space-resolved fluorescence study on interfacial mobility of polymers

Keiji Tanaka, Yu Tsuchimura, Kei Ichi Akabori, Fuyuki Ito, Toshihiko Nagamura

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Segmental mobility of a typical amorphous polymer, polystyrene, at the interface with a solid substrate was examined noninvasively by fluorescence lifetime measurement using evanescent wave excitation. Glass transition temperature (Tg) was discernibly higher at the interface than in the bulk. Measurements at different incident angles of excitation pulses revealed that Tg became higher the closer to the interface. This is the observation for a Tg gradient of polymers at the interface.

Original languageEnglish
Article number061916
JournalApplied Physics Letters
Issue number6
Publication statusPublished - Aug 21 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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