Evolution of poling-assisted bleaching of metal-doped nanocomposite glass with poling conditions
Evolution of poling-assisted bleaching of metal-doped nanocomposite glass with poling conditions
复制标题
金属掺杂纳米复合玻璃在极化条件下极化辅助漂白的进展
DOI：
10.1063/1.1977205
复制
发表时间：
2005
影响因子：
4
通讯作者：
H. Graener
中科院分区：
文献类型：
--
作者：
O. Deparis;P. Kazansky;A. Podlipensky;A. Abdolvand;G. Seifert;H. Graener
研究了极化时间、电压和温度对具有沿深度的银纳米颗粒梯度的玻璃样品的极化辅助漂白。测量了颗粒表面等离子体共振产生的光学消光带(约415 nm)，并用Maxwell-Garnett有效介质理论对消光光谱进行了拟合。拟合使我们能够确定由于漂白过程导致颗粒体积填充因子降至零的近表面层厚度的演变。在280℃下，在低至200V的电压下开始漂白，并在大约1小时后随时间饱和。为了在极化区获得显著且均匀的漂白，需要紧密的玻璃电极接触，电压至少1kV，温度高于200℃。根据电场辅助溶解嵌入金属纳米颗粒的基本原理对结果进行了讨论。
Poling-assisted bleaching was studied with respect to poling time, voltage, and temperature in glass samples having a gradient of silver nanoparticles across the depth. The optical extinction band due to the particles' surface plasmon resonance (around 415 nm) was measured and the Maxwell-Garnett effective medium theory was used to fit extinction spectra. Fitting allowed us to determine the evolution of the thickness of the near-surface layer where the particles' volume filling factor has dropped to zero as a result of the bleaching process. At 280 degrees C, bleaching started with a voltage as low as 200 V and saturated with time after about 1 h. Tight glass-electrode contact, voltage of at least 1 kV, and temperature higher than 200 degrees C were required in order to obtain significant and uniform bleaching in the poled area. The results were discussed in terms of the underlying electric-field-assisted dissolution of embedded metal nanoparticles.