A reactive nitrocellulose film

Article Abstract:

A nanosecond interferometric approach was used to investigate laser-induced decomposition and the accompanying ablation dynamics of a reactive nitrocellulose film doped with a Cu-phthalocyanine derivative as a light absorber. The technique is based on a Michelson interferometer combined with pulsed lasers. The use of the novel method enabled the detection of temporal evolution of macroscopic morphological changes of several different polymer films. The dynamics of the transient expansion was also found to vary from polymer to polymer, which was attributed to the glass transition temperature.

Methods, Thin films, Decomposition (Chemistry), Interferometry, Mass transfer, Nitrocellulose

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Femtosecond double-pulse excitation study of alpha-sexithienyl film

Article Abstract:

Research was conducted to examine the femtosecond double-pulse excitation study of alpha-sexithienyl film. Relaxation dynamis was observed from a higher triplet excited state in 6T film, which is prepared by exciting the T1-Tn absorption band. Results show that the mixing of the Tn state and the CT exciton state is energetically possible. The process may compete with another relaxation pathway which is the formation of the ion-pair state and T1 state.

Nuclear excitation, Relaxation (Nuclear physics)

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Laser-induced nanometer-nanosecond expansion and contraction dynamics of poly(methyl methacrylate) film studied by time-resolved interferometry

Article Abstract:

Time-resolved interferometry is used for studying the laser-induced nanometer-nanosecond expansion and contraction dynamics of poly(methyl methacrylate) (PMMA), where the expansion and contraction behavior of the PMMA are measured as a function of the laser influence. Unique morphological changes are induced by the excimer laser irradiation of the neat PMMA FILM.

Science & research, Morphology (Biology), Laser beams, Morphology

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