Size-dependent photochromism-based holographic storage of Ag/TiO2 nanocomposite film
Size-dependent photochromism-based holographic storage of Ag/TiO2 nanocomposite film
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基于尺寸依赖性光致变色的 Ag/TiO2 纳米复合薄膜的全息存储
DOI：
10.1063/1.3595399
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发表时间：
2011-05-30
影响因子：
4
通讯作者：
Liu, Yichun
中科院分区：
文献类型：
--
作者：
Han, Runyuan;Zhang, Xintong;Liu, Yichun
以532 nm激光为激发光源和记录光，研究了Ag纳米粒子（NPs）的粒径分布对Ag/TiO 2薄膜光致变色行为和全息存储动力学的影响。实验结果表明，在532 nm激发下，小尺寸银纳米颗粒比大尺寸银纳米颗粒更容易发生光致氧化溶解，有利于全息光栅在初始阶段的快速生长。这些观察结果进行了讨论的尺寸依赖性的银氧化还原电位的影响之间的界面电子转移的银纳米粒子和TiO 2基质和随后的溶解的银纳米粒子，以及表面等离子体共振吸收特性的银纳米粒子也与它们的尺寸分布。
The influence of size distribution of Ag nanoparticles (NPs) on photochromic behavior and holographic storage dynamics of Ag/TiO2 films was investigated using a 532 nm laser as excitation source and recording beams, respectively. Experimental results suggest that small Ag NPs are subject to easier photoinduced oxidative dissolution than large Ag NPs under the 532 nm excitation, and contribute to the rapid growth of holographic grating in the initial stage. These observations were discussed in terms of size-dependent silver redox potential influencing both interfacial electron transfer among Ag NPs and TiO2 matrix and subsequent dissolution of Ag NPs, as well as surface plasmon resonance absorption property of Ag NPs also related to their size distribution.