TY - GEN
T1 - Nanometer expansion and contraction dynamics of polymer films induced by nanosecond laser excitation
AU - Masuhara, Hiroshi
AU - Tada, T.
AU - Masubuchi, T.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - Intense excimer laser excitation of poly(methyl methacrylate) (PMMA) and polyimide films gives the transient expansion and the following contraction, which was directly measured as a function of nanosecond delay time during and after excitation. Depending on laser excitation condition, very rapid decay component and oscillatory behavior were observed in contraction and also phase transition is confirmed for PMMA. The behaviors are well interpreted by photothermal mechanism. In case of polyimide the expansion behavior is inconsistent with the simulation based on photothermal mechanism, on which we consider photochemical processes. New aspects of nonlinear polymer dynamics are presented and summarized.
AB - Intense excimer laser excitation of poly(methyl methacrylate) (PMMA) and polyimide films gives the transient expansion and the following contraction, which was directly measured as a function of nanosecond delay time during and after excitation. Depending on laser excitation condition, very rapid decay component and oscillatory behavior were observed in contraction and also phase transition is confirmed for PMMA. The behaviors are well interpreted by photothermal mechanism. In case of polyimide the expansion behavior is inconsistent with the simulation based on photothermal mechanism, on which we consider photochemical processes. New aspects of nonlinear polymer dynamics are presented and summarized.
UR - http://www.scopus.com/inward/record.url?scp=49549103121&partnerID=8YFLogxK
U2 - 10.1021/bk-2004-0869.ch017
DO - 10.1021/bk-2004-0869.ch017
M3 - Conference contribution
AN - SCOPUS:49549103121
SN - 9780841238503
T3 - ACS Symposium Series
SP - 212
EP - 225
BT - Nonlinear Dynamics in Polymeric Systems
A2 - Pojman, John
A2 - Tran-Cong-Miyata, Qui
ER -