Evaporation-driven self-organization of photoluminescent organic dye-doped silica-poly(vinylpyrrolidone) hybrid films prepared by low-speed dip-coating
Evaporation-driven self-organization of photoluminescent organic dye-doped silica-poly(vinylpyrrolidone) hybrid films prepared by low-speed dip-coating
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低速浸涂制备光致发光有机染料掺杂二氧化硅-聚乙烯基吡咯烷酮杂化薄膜的蒸发驱动自组织
DOI：
10.1016/j.colsurfa.2014.03.066
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Hiromitsu Kozuka
中科院分区：
文献类型：
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作者：
Hiroaki Uchiyama;Ryosuke Sasaki;Hiromitsu Kozuka
采用低速浸涂法制备了含有机光致发光染料罗丹明6G （R6G）的二氧化硅-聚乙烯吡咯烷酮（PVP）杂化膜，并在膜上诱导自发图案形成。浸涂过程中，在半月板处通过粘滑运动自发形成了垂直于衬底提取方向的条纹图案，并且随着挥发性溶剂（C2H5OH）在C2H5OH/Si(OCH3)4mol比(x) = 20-150的溶液中添加量的增加，薄膜结构（即薄膜厚度、条纹图案的高度、宽度和间距）发生了变化。通过对薄膜结构的优化，在x= 120范围内实现了条纹图案的局部光致发光。
We prepared silica-poly(vinylpyrrolidone) (PVP) hybrid films containing a photoluminescent organic dye, rhordamine 6G (R6G), by low-speed dip-coating, where the spontaneous pattern formation was induced in the films. Stripe patterns arranged perpendicular to the substrate withdrawal direction were spontaneously formed by stick-slip motion at the meniscus during dip-coating, and the film structure (i.e., the film thickness, and the height, width and spacing of stripe patterns) was changed with increasing amounts of volatile solvent (C2H5OH) in solutions (C2H5OH/Si(OCH3)4mole ratio (x) = 20–150). As a result of the optimization of the film structure, localized photoluminescence at the stripe patterns was achieved overx= 120.