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