Surface plasmon resonance of silver nanoparticles on vanadium dioxide

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The localized surface plasmon resonance (SPR) spectrum of silver nanoparticles fabricated on a thermochromatic film, vanadium dioxide (VO2), is studied in this paper. Owing to the temperature-dependent dielectric function of VO2, the SPR band dramatically exhibits temperature dependence in the range of 30-80 degrees C. The peak extinction wavelength, lambda(SPR), blueshifts as temperature increases and reversibly redshifts as temperature decreases. The shift magnitude (DeltalambdaSPR) is strongly dependent on the silver mass thickness, dm; a value of 50 nm of DeltalambdaSPR is achieved for particles (mean diameter 51 nm) with dm=2 nm while a value of 250 nm is achieved for particles (mean diameter 133 nm) with dm=10 nm. Beyond the SPR band, it is interesting to find that the spectral line shape of silver particles is dominated by the imaginary part of the dielectric function of VO2. These results can be interpreted based on dynamical Maxwell-Garnett theory.




Xu, G., Chen, Y., Tazawa, M., & Jin, P. (2006). Surface plasmon resonance of silver nanoparticles on vanadium dioxide. Journal of Physical Chemistry B, 110(5), 2051–2056.

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