Shear modulation force microscopy study of near surface glass transition temperatures

نویسندگان

  • Ge
  • Pu
  • Zhang
  • Rafailovich
  • Sokolov
  • Buenviaje
  • Buckmaster
  • Overney
چکیده

We report results of glass transition (T(g)) measurements for polymer thin films using atomic force microscopy (AFM). The AFM mode, shear modulation force microscopy (SMFM), involves measuring the temperature-dependent shear force on a tip modulated parallel to the sample surface. Using this method we have measured the surface T(g) of thin (17-500 nm) polymer films and found that T(g) is independent of film thickness (t>17 nm), strength of substrate interactions, or even presence of substrate.

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عنوان ژورنال:
  • Physical review letters

دوره 85 11  شماره 

صفحات  -

تاریخ انتشار 2000