Formation of holographic fringes on photochromic Ag/TiO2 nanocomposite films
Formation of holographic fringes on photochromic Ag/TiO2 nanocomposite films
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光致变色 Ag/TiO2 纳米复合薄膜上全息条纹的形成
DOI：
10.1063/1.3078232
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发表时间：
2009-02-16
影响因子：
4
通讯作者：
Li, Jixue
中科院分区：
文献类型：
--
作者：
Qiao, Qian;Zhang, Xintong;Li, Jixue
在可见光照射下，沉积在TiO2纳米孔膜上的银纳米粒子表现出独特的光致变色性能。本文研究了光致变色Ag/TiO2纳米复合薄膜在全息数据存储中的应用。用两束相干绿色激光作为写入光束，在Ag/TiO2薄膜上形成稳定的全息条纹，这些条纹可以用紫外照射擦除。这些观察结果与Ag/TiO2纳米复合膜的光致变色一致，可以很好地解释为可见光刺激下银纳米颗粒在TiO2基体中的溶解和紫外线刺激下的再生。
Silver nanoparticles deposited on TiO2 nanoporous films exhibited unique photochromic property under the irradiation of visible light. Here we investigated the application of photochromic Ag/TiO2 nanocomposite film in holographic data storage. Stable holographic fringes were formed on the Ag/TiO2 film using two coherent green lasers as writing beams, and these fringes could be erased with ultraviolet irradiation. These observations are consistent with the photochromism of Ag/TiO2 nanocomposite film and can be well explained by the visible light-stimulated dissolution and ultraviolet light-stimulated regeneration of silver nanoparticles in TiO2 matrix.