Monolayer-protected gold nanoparticle coalescence induced by photogenerated radicals |
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Authors: | Kell Arnold J Alizadeh Abdolhamid Yang Li Workentin Mark S |
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Institution: | Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7. |
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Abstract: | Acyl and alkyl radicals generated photochemically in a solution containing monolayer-protected gold nanoparticles are shown to efficiently liberate the alkylthiolate ligands into the solution as the thioacetyl or alkyl sulfide, respectively. This radical-induced reaction initiates a coalescence of the gold cores to facilitate an increase in core size. The photoinitiated radical reaction also liberates monolayers from two-dimensional gold surfaces. |
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