Size dependence of transition temperature in polymer nanowires.
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.
Nakanishi
Sana
S
Department of Applied Physics, Osaka University, 2-1 Yamadaoka Suita, Osaka 565-0872, Japan.
Yoshikawa
Hirofumi
H
Shoji
Satoru
S
Sekkat
Zouheir
Z
Kawata
Satoshi
S