Abstract
Silica two-dimensional substrates and nanowires (NWs) forests have been successfully decorated with Au nanoparticles (NPs) through laser ablation by using a pulsed ArF excimer laser, for sensor applications. A uniform coverage of both substrate surfaces with NPs has been achieved controlling the number of laser pulses. The annealing of the as-deposited particles resulted in a uniform well-defined distribution of spherical NPs with an increased average diameter up to 25 nm. The deposited samples on silica NWs forest present a very good plasmonic resonance which resulted to be very sensitive to the changes of the environment (ethanol/water solutions with increasing concentration of ethanol) allowing the detection of changes on the second decimal digit of the refractive index, demonstrating its potentiality for further biosensing functionalities.
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Gontad, F., Caricato, A.P., Manera, M.G. et al. 3D plasmonic transducer based on gold nanoparticles produced by laser ablation on silica nanowires. Appl. Phys. A 122, 539 (2016). https://doi.org/10.1007/s00339-016-0063-2
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DOI: https://doi.org/10.1007/s00339-016-0063-2