Modulation of the surface plasmon resonance of colloidal silver nanoparticles driven by particle shape oscillations is interrogated via transient-scattering measurements using white light as the probe. The two-dimensional (λ, t) image of the spectrally resolved scattering shows π/2 phase shift between the modulation of center Ω(t) and width Γ(t) of the resonance − while Ω is modulated by the strain amplitude, the plasmon-damping rate Γ is modulated by the strain rate. We ascribe the effect to scattering from the electrophoretic potential generated by the motion of the interfacial double layer of the colloidal particles.
- plasmon damping
- colloidal metallic nanoparticles
Zadoyan, R., Seferyan, H. Y., Wark, A. W., Corn, R. M., & Apkarian, V. A. (2007). Interfacial velocity-dependent plasmon damping in colloidal metallic nanoparticles. Journal of Physical Chemistry C, 111(29), 10836-10840. https://doi.org/10.1021/jp0715979