Silver nanocrystallites are obtained through immersion of porous silicon samples in AgNO3 solutions and a successive thermal annealing. The efficiency of nanostructures as surface enhanced Raman scattering (SERS) substrates is checked on cyanine-based dyes and horseradish peroxidase, evidencing detectable concentrations as low as 10-7 to 10-8 M. The substrate efficiency is strictly related to the Ag particle morphology, which could yield to either local surface plasmons (LSP) coupled to individual particles or to inter-particle short-range interaction.
Porous silicon as efficient surface enhanced Raman scattering (SERS) substrate.
Froner, Elena;Scarpa, Marina;
2008-01-01
Abstract
Silver nanocrystallites are obtained through immersion of porous silicon samples in AgNO3 solutions and a successive thermal annealing. The efficiency of nanostructures as surface enhanced Raman scattering (SERS) substrates is checked on cyanine-based dyes and horseradish peroxidase, evidencing detectable concentrations as low as 10-7 to 10-8 M. The substrate efficiency is strictly related to the Ag particle morphology, which could yield to either local surface plasmons (LSP) coupled to individual particles or to inter-particle short-range interaction.File in questo prodotto:
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