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MAPLE(matrix-assisted pulsed laser evaporation)技术是近年来发展起来的一门有机薄膜制备技术,与传统的有机薄膜制备技术相比,具有优越的技术特点.在非线性光学材料、发光器件、电磁材料和各种传感器方面都有着广泛的应用前景.利用MAPLE技术成功制备了聚酰亚胺薄膜,并利用X射线光电子能谱对其表面进行了分析.光电子能谱结果显示,在低激光能量密度时,单光子效应明显,化学键断裂,发生分解,不利于薄膜的制备.而在高激光能量密度时,单光子效应降低,多光子效应和光热效应增强,聚酰亚胺的结构得到保护,分解明显减弱.
MAPLE (matrix-assisted pulsed laser evaporation) technology developed in recent years is an organic thin film preparation technology, compared with the traditional organic thin film preparation technology, has superior technical characteristics.In the nonlinear optical materials, light-emitting devices, electromagnetic materials And a variety of sensors have a wide range of applications.MAPLE technology was successfully used to prepare a polyimide film, and the use of X-ray photoelectron spectroscopy of its surface was analyzed by photoelectron spectroscopy results show that at low laser energy densities , The single photon effect is obvious, the chemical bond is broken and decomposed, which is unfavorable to the preparation of the thin film.While the high laser energy density, the single photon effect is reduced, the multiphoton effect and the photothermal effect are enhanced, the structure of the polyimide is protected, the decomposition is obviously weakened .