Abstract
An Au/SiO2 nanocomposite film was prepared as an Au nanoparticulate monolayer by co-sputtering to achieve tunable aggregation of Au nanoparticles on the substrate. The Au nanoparticles in the Au/SiO2 nanocomposite film were aggregated through water treatment because of disintegration of the SiO2 phase by water and the attractive force between Au nanoparticles with a free surface. For a partially 4-fluorobenzylmercaptane-immobilized Au/SiO2 nanocomposite film, the Au nanoparticles were aggregated homogeneously with their limited neighbors differently from the fully exposed Au nanoparticles without the molecular immobilization. The surface plasmon band was red shifted to 560 nm with increased intensity by the controlled aggregation.
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Kim, DG., Koyama, E., Tokuhisa, H. et al. Tunable aggregation of Au nanoparticles in Au/SiO2 composite film and its photo-absorbance. Appl. Phys. A 92, 263–266 (2008). https://doi.org/10.1007/s00339-008-4525-z
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DOI: https://doi.org/10.1007/s00339-008-4525-z