LASER IMPLANTATION OF ANTHRACENE MOLECULES INTO POLY(ALKYL METHACRYLATE) FILMS OF DIFFERENT GLASS TRANSITION TEMPERATURES
LASER IMPLANTATION OF ANTHRACENE MOLECULES INTO POLY(ALKYL METHACRYLATE) FILMS OF DIFFERENT GLASS TRANSITION TEMPERATURES
复制标题
不同玻璃化温度聚甲基丙烯酸烷基酯薄膜中蒽分子的激光注入
DOI：
10.1021/jp9637136
复制
发表时间：
1997
影响因子：
3.3
通讯作者：
H. Masuhara
中科院分区：
文献类型：
--
作者：
G. Géry;H. Fukumura;H. Masuhara
用纯聚合物膜（目标膜）覆盖掺杂有蒽分子的聚合物膜（源膜），并用穿过目标膜的XeF准分子激光照射。在低于源膜的烧蚀阈值的激光能量密度下，蒽分子从源膜喷射并注入到接触的靶膜中。在显微镜下，在目标膜的表面处清楚地观察到注入分子的荧光图像。通过扫描电子显微镜的观察证实了在目标膜的表面处不存在转移的聚合物片段。准分子激光照射后，从源转移到目标膜的分子的数量估计从目标膜的荧光强度的变化，并分析在Arrhenius图。蒽分子在PMMA和PEMA中的扩散是一个光热激活的扩散过程，其扩散激活能随温度的升高而增大。
A polymer film doped with anthracene molecules (source film) was overlaid with a neat polymer film (target film) and irradiated with a XeF excimer laser passing through the target film. At a laser fluence below the ablation threshold of the source film, anthracene molecules were ejected from the source film and implanted into the contacting target film. A fluorescence image of the implanted molecules was clearly observed at the surface of the target film under a microscope. The observation by a scanning electron microscope confirmed the absence of transferred polymer fragments at the surface of the target film. The number of transferred molecules from the source to the target films upon excimer laser irradiation was estimated from the changes in fluorescence intensity of the target films and analyzed in terms of an Arrhenius plot. The mass transfer is revealed to be a photothermally activated diffusion process and the activation energy associated with the diffusion of anthracene molecules in PMMA and PEMA...