Disentangling Light- and Temperature-Induced Thermal Effects in Colloidal Au Nanoparticles
Lijie Wang, Davood Zare, Tsz Him Chow, Jianfang Wang, M. Magnozzi, Majed Chergui
Abstract
) parts of the dielectric constant of Au NPs and of the surrounding medium. In addition, we model the photoinduced response of the NPs over the entire spectral range. The experimental and theoretical results of the thermal heating and the simulations of the photoinduced heating are compared with the ultrafast photoinduced transient absorption (TA) spectra upon excitation of the LSPR. These show that while the latter is a reliable monitor of heating of the NP and its environment, the interband region mildly responds to heating but predominantly to the population evolution of charge carriers.
Topics & Concepts
Materials scienceSurface plasmon resonanceAbsorption (acoustics)NanoparticleUltrafast laser spectroscopyDielectricSpectral lineAtmospheric temperature rangeMolecular physicsPlasmonCharge carrierAbsorption spectroscopyAnalytical Chemistry (journal)OptoelectronicsChemistrySpectroscopyNanotechnologyOpticsThermodynamicsChromatographyComposite materialQuantum mechanicsPhysicsAstronomyGold and Silver Nanoparticles Synthesis and ApplicationsNonlinear Optical Materials StudiesQuantum Dots Synthesis And Properties