The 3D Design of Multifunctional Silver Nanoparticle Assemblies Embedded in Dielectrics
Résumé
Many applications as optical spectroscopy, photothermal therapy, photovoltaics or photocatalysis take advantage of localized surface plasmon resonance of noble metal nanoparticles. Among them, Ag nanoparticles are multi-functionnal nano-objects that can be used as efficient plasmonic antennae but also as electron reservoirs for charge transfer or ion reservoirs with strong biocide activity. In this feature article we present our 10 years efforts on the safe by design synthesis of multifunctional nanocomposites consisting of 3D patterns of small AgNPs embedded in dielectrics by coupling low-energy ion implantation and stencil masking techniques. Their multifunctional coupling with different objects deposited on top of the dielectric surface will also be presented through three examples. The applications as optic applications as op antage of l e of localized sur ocalized nanoparticles are are multi mul-Accepted Article funct electron reservoirs electron reserv e article we present e article we pr omposites consisting posites consist 2 twofold role of this single plane of AgNPs as embedded plasmonic enhancer and charge carrier reservoir has been first tested on few-layer graphene deposited in specific areas at a controlled nanometer distance from the AgNPs. These buried AgNPs have also been coupled to light emitters co-implanted in the dielectric matrix in specific regions, showing light emission enhancement. Finally, these AgNPs also provide an efficient biocide activity on green algae when submersed in water, with the amount of Ag + release simply controlled by the thickness of the silica cover layer.
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