Abstract
We show that sum-frequency generation spectroscopy performed in the total
internal reflection configuration (TIR-SFG) combined with a dense gold
nanoparticles monolayer allows us to study, with an excellent signal to noise
ratio and high signal to background ratio, the conformation of adsorbed
molecules. Dodecanethiol (DDT) was used as probe molecules in order to
assess the potentialities of the approach. An enhancement of more than one
order of magnitude of the SFG signals arising from the adsorbed species is
observed with the TIR geometry compared to the external reflection one
while the SFG non-resonant contribution remains the same for both
configurations. Although further work is required to fully understand the
origin of the SFG process on nanoparticles, our work opens new possibilities
for studying nanostructures.
Original language | English |
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Pages (from-to) | 415301-415308 |
Number of pages | 8 |
Journal | Nanotechnology |
Volume | 18 |
Publication status | Published - 2007 |