Bleaching versus poling: Comparison of electric field induced phenomena in glasses and glass-metal nanocomposites
Bleaching versus poling: Comparison of electric field induced phenomena in glasses and glass-metal nanocomposites
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漂白与极化：玻璃和玻璃-金属纳米复合材料中电场感应现象的比较
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发表时间：
2011
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通讯作者：
V. Zhurikhina
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作者：
A. Lipovskii;V. Melehin;M. Petrov;Y. Svirko;V. Zhurikhina
通过研究玻璃和玻璃-金属纳米复合材料（GMN）中的电场诱导过程，我们提出了金属纳米颗粒在玻璃中的电场辅助溶解（EFAD）机制。我们表明，在玻璃极化和EFAD过程中，强（高达1 V/nm）的局部电场在亚阳极区域是由于存在的“慢”氢离子键合到非桥氧原子在玻璃基质。然而，这些氢离子在玻璃和GMN中的来源是不同的。具体来说，当我们将电场施加到原始玻璃时，在极化过程中发生玻璃中氢物质的富集。在GMN中，在金属纳米颗粒形成过程中，氢离子通过氢还原金属而被引入玻璃基质中，即，在施加电场之前。金属纳米颗粒的EFAD类似于玻璃中金属膜的电场刺激扩散（然而重要的区别在于，在GMN中，没有直接的扩散）。
By examining the electric field induced processes in glasses and glass-metal nanocomposites (GMN) we propose mechanism of the electric field assisted dissolution (EFAD) of metal nanoparticles in glass. We show that in both glass poling and EFAD processes, the strong (up to 1 V/nm) local electric field in the subanodic region is due to the presence of “slow” hydrogen ions bonded to nonbridging oxygen atoms in glass matrix. However, the origin of these hydrogen ions in glass and GMN is different. Specifically, when we apply the electric field to a virgin glass, the enrichment of the glass with hydrogen species takes place in the course of the poling. In GMN, the hydrogen ions have been incorporated into the glass matrix during metal nanoparticles formation via reduction in a metal by hydrogen, i.e., before the electric field was applied. The EFAD of metal nanoparticles resembles the electric field stimulated diffusion of metal film in glass (the important difference however is that in GMN, there is no direc...