TIME-RESOLVED SPECTROSCOPIC AND PHOTOGRAPHIC STUDIES ON LASER-ABLATION OF POLY(METHYL METHACRYLATE) FILM DOPED WITH BIPHENYL

被引：50

作者：

FUKUMURA, H ^{[1
]}

TAKAHASHI, E ^{[1
]}

MASUHARA, H ^{[1
]}

机构：

[1] KYOTO INST TECHNOL,DEPT POLYMER SCI & ENGN,SAKYO KU,KYOTO 606,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 02期

关键词：

D O I：

10.1021/j100002a044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanosecond time-resolved spectroscopic and photographic measurements have been conducted for studying the mechanism of laser ablation of polymer films doped with biphenyl. Comparisons between the two different measurements made it possible to assign transient species observed during the ablation. The triplet state of the dopant was detected prior to the polymer ejection, while the excited singlet state was confirmed with its fluorescence. Besides these, biradicals such as C-2, CH, and CN were identified and plasma emission was observed, but only when the fluence was increased highly above the laser ablation threshold. The excited singlet and triplet states were concluded to be main transient species leading to ablation. Temporal behavior of the excited singlet state was simulated with a model involving the ground, excited singlet, and triplet states, and the ablation mechanism was discussed.

引用

页码：750 / 757

页数：8

共 47 条

[1] DETERMINATION OF TRIPLET QUANTUM YIELDS BY LASER FLASH ABSORPTION SPECTROSCOPY [J].