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An ammonia-free approach for the preparation of silver@silica core/shell nanocomposites is reported in order to avoid the silver core etching during the preparation in a typical Stöber approach. Silver nanoparticles were used as the core and tetraethoxy orthosilicate (TEOS) was used the silica source. The silica layer formation process was investigated under alkaline conditions. Several bases were...
Au/Ag core/shell nanoparticles are fabricated by laser-ablating Ag plates in Au colloid solution. The absorption band is found to blue shift with increasing ablation time. Mie theory calculations show that the shift is caused by the increase of the Ag shell thickness. The average Ag shell thickness can be determined from the measured absorption peak. Using the plasmon hybridization approach, we show...
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