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TEM monitoring of silver nanoparticles formation on the surface of lead crystal glass

机译：TEM监测铅晶体玻璃表面银纳米颗粒的形成

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Silver nanoparticles have been formed on the surface of lead crystal glass by means of (i) ion-exchange of alkaline ions from the glass by Ag+ ions from a molten salts bath, and (ii) silica based sol-gel coatings containing silver. All experimental variables concerning both ion-exchange process and sol-gel coatings application were combined and studied as main parameters governing the reduction of Ag+ ions to Ag-0 atoms and further aggregation to form nanosized colloids. The content of thermoreducing agents (arsenic or antimony oxides) in the lead crystal glass was essential to favour the reduction of silver ions to form nanoparticles. Optimal experimental conditions to be used for the obtaining of surface silver nanoparticles were determined. TEM was used as the principal characterisation technique for direct observation of the nanoparticles generated. The size of silver colloids varied in the 20-300 nm range for ion-exchanged samples and in the 10-80 nm range for sol-gel coated samples. (c) 2006 Elsevier B.V. All rights reserved.
机译：通过（i）通过来自熔融盐浴的Ag +离子与玻璃中的碱性离子进行离子交换，以及（ii）含银的二氧化硅基溶胶-凝胶涂层，在铅晶体玻璃的表面上形成了银纳米颗粒。结合离子交换工艺和溶胶-凝胶涂料应用的所有实验变量进行了组合和研究，作为控制将Ag +离子还原为Ag-0原子并进一步聚集以形成纳米胶体的主要参数。铅晶体玻璃中热还原剂（砷或锑的氧化物）的含量对于促进还原银离子以形成纳米颗粒至关重要。确定了用于获得表面银纳米颗粒的最佳实验条件。 TEM被用作直接观察生成的纳米颗粒的主要表征技术。对于离子交换样品，银胶体的尺寸在20-300 nm范围内变化，对于溶胶-凝胶涂覆的样品，银胶体的尺寸在10-80 nm之间变化。 （c）2006 Elsevier B.V.保留所有权利。

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