复合纳米光学变色薄膜  

Composite Nano Chromotropic Film

作　　者：倪星元[1] 吕俊霞[1] 魏建东[1] 吴广明[1] 周斌[1] 沈军[1] 王珏[1] 

机构地区：[1]同济大学波耳固体物理研究所,上海200092

出　　处：《光学学报》2004年第4期433-436,共4页Acta Optica Sinica

基　　金：国家自然科学基金 (2 0 1330 4 0 );国家高科技 86 3(2 0 0 2AA84 2 0 5 2;2 0 0 2AA84 4 12 0 )资助课题

摘　　要：用热蒸发和磁控溅射的物理镀膜方法和溶胶凝胶化学涂布的方法相结合制备了有机和无机复合纳米光学变色薄膜。光学变色薄膜为多层薄膜 ,当有自然光进入光学变色薄膜时 ,随着入射光和视角的变化在薄膜上可以看到明显的光变色效果。这种薄膜可以单独或与油墨组合作为一种新颖的防伪材料。根据多层复合膜光干涉原理经设计和计算确定薄膜为PET/Cr/介质 /Al膜系结构。介质分别是有机高聚物和SiO2 。SiO2 是多孔纳米材料 ,用溶胶凝胶方法制备 ,通过调节催化和凝胶的方式和条件 ,折射率在 1.15～ 1.4 5之间。Physical method, including thermal evaporation and magnetic sputtering, and chemical coating method are applied to prepare organic-inorganic composite chromotropic film. The chromotropic film showing obvious opto-chromo effect with the change of incidence angle and view angle, can be used as a counterfeiting preventing material. The structure of the film system is designed as PET/Cr/dielectric/Al according to the optical interference principle of multiplayer. The dielectric materials are polymer and SiO 2 respectively. The SiO 2 prepared by sol-gel method shows nano-holes. Its refractive index is between 1.15 and 1.45 by varying the method and condition of catalyst and gel process. Fabrication method and film characteristics are described.

关 键 词：薄膜光学 光学变色薄膜 纳米材料 磁控溅射法 折射率 溶胶-凝胶法 

分 类 号：O484.41[理学—固体物理] TB383[理学—物理]