Temperature dependence of the surface plasmon resonance in gold nanoparticles

Abstract

The temperature dependences of the energy and the width of a surface plasmon resonance are studied for copper nanoparticles 17-59 nm in size in the silica host matrix in the temperature interval 293-460 K. An increase of the temperature leads to the red shift and the broadening of the surface plasmon resonance in Cu nanoparticles. The obtained dependences are analyzed within the framework of a theoretical model considering the thermal expansion of a nanoparticle, the electron-phonon scattering in a nanoparticle, and the temperature dependence of the dielectric permittivity of the host matrix. The thermal expansion is shown to be the main mechanism responsible for the temperature-induced red shift of the surface plasmon resonance in copper nanoparticles. The thermal volume expansion coefficient for Cu nanoparticles is found to be size-independent in the studied size range. Meanwhile, the increase of the electron-phonon scattering rate with the temperature is shown to be the dominant mechanism of the surface plasmon resonance broadening in copper nanoparticles.K e y w o r d s: surface plasmon resonance, copper nanoparticles, temperature-induced effects

Catalysis with Supported Size-selected Pt Clusters

“…Consequently for particles a LSPR (a result of collective coherent oscillations of the conducting electrons with respect to the charged atomic cores) can be detected. The observed plasmon frequency is strongly dependent on the temperature [298], particle geometry, size, (dielectric) environment and the material. These dependencies are used, for INPS in order to characterize and study materials [67,93,202,299], by observing the change in plasmon frequency.…”

Invited Article: Optical trapping of ultrasmooth gold nanoparticles in liquid and air

“…28 The dielectric function of gold determines its optical properties and is highly temperature dependent, which changes the absorption cross section (σ abs ) and influences the resulting particle temperature depending on the wavelength under consideration. 29 At elevated temperatures, excited phonons will severely damp the electron oscillations, which reduces σ abs of the gold NP. When trapped with increased optical power levels, the gold NPs will exhibit a much lower rate of temperature rise.…”

Ultrafast Optical Heating Induced Polarization-Dependent Optical Switching in Gold Nanowires

“…Although the temperature dependence of dielectric permittivity of the host matrix may also contribute to the redshift of plasmon resonance [17], such mechanisms should not have polarization dependence. In this work, we observed strong redshift of the spectrum for TE polarization in the direction of the grating lines.…”