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Updated: Jul 6, 2026

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films
Published on: January 26, 2016
Size dependence of transition temperature in polymer nanowires
Sana Nakanishi1, Hirofumi Yoshikawa, Satoru Shoji
1Department of Applied Physics, Osaka University, 2-1 Yamadaoka Suita, Osaka 565-0872, Japan.
Abstract:
We studied the effect of changing temperature on the mechanical properties of nanosized poly(methyl methacrylate) wires fabricated by two-photon fabrication. At around room temperature, the nanowires showed a transition temperature where the shear modulus suddenly changed. This transition temperature was observed to decrease more than 40 K by decreasing the radius of the nanowires from 450 to 150 nm. This size is several times larger in nanowires than reported values of polymer thin film thickness showing a depression of the glass transition temperature.
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