Intensity-Based Single Particle Plasmon Sensing
Posted on 2021-02-22 - 19:56
Plasmon
sensors respond to local changes of their surrounding environment
with a shift in their resonance wavelength. This response is usually
detected by measuring light scattering spectra to determine the resonance
wavelength. However, single wavelength detection has become increasingly
important because it simplifies the setup, increases speed, and improves
statistics. Therefore, we investigated theoretically how the sensitivity
toward such single wavelength scattering intensity changes depend
on the material and shape of the plasmonic sensor. Surprisingly, simple
equations describe this intensity sensitivity very accurately and
allow us to distinguish the various contributions: Rayleigh scattering,
dielectric contrast, plasmon shift, and frequency-dependent plasmon
bulk damping. We find very good agreement of theoretical predictions
and experimental data obtained by single particle spectroscopy.
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Celiksoy, Sirin; Ye, Weixiang; Wandner, Karl; Kaefer, Katharina; Sönnichsen, Carsten (2021). Intensity-Based Single Particle Plasmon Sensing. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.0c04702
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AUTHORS (5)
SC
Sirin Celiksoy
WY
Weixiang Ye
KW
Karl Wandner
KK
Katharina Kaefer
CS
Carsten Sönnichsen