Liquid-Phase Formation of Silver Nanoparticles on a Glass Substrate Regulated by Gold Nanoparticles

摘要

We developed a low-temperature, low-vacuum, bottom-up process of manufacturing nanostructures composed of silver/gold NPs. The process included surface modification of the glass substrate with an APTS SAM. Gold NPs regulated the deposition of silver NPs, causing the silver NPs to deposit as isolated NPs rather than as aggregated NPs. This enabled the gold/silver NP substrate to exhibit higher fluorescence enhancement than substrates with either only silver or only gold NPs. The proposed gold and silver nanoparticle substrates are readily applicable to promising NP applications, such as ultrasensitive bio/chemical detection and catalysis.