Events
The lecture titled When nanoparticles get hot will be delivered by Dr Francesco Bisio from CNR-SPIN (Consiglio Nazionale delle Ricerche – SuPerconducting and other INnovative materials and devices institute), Genoa, Italy.
Participation
Abstract
The impulsive photoexcitation of metallic nanoparticles (NPs) kicks off a complex relaxation process involving the time-dependent re-equilibration of the electron gas, ion lattice, and NP. environment. These dynamic processes and the energy redistribution among the system’s degrees of freedom lie at the very heart of several highly-intriguing light-induced physical phenomena, such as photocatalysis, thermoplasmonics and solar energy conversion. Highly energetic non-thermal electrons (available in the first few hundreds of fs following the excitation), in particular, play a pivotal role in determining the final outcome of photocatalytic reactions, whereas the lattice-temperature evolution is instrumental for thermoplasmonics heating. In order to fully understand and harness these processes, it is necessary to know the dynamic, time-dependent evolution of the temperature of each system subcomponents.
In this talk, I will introduce various experimental approaches to directly deduce the temporal evolution, on the fs-to-ps time scale, of the electronic and lattice temperature of plasmonic NPs excited by ultrashort laser pulses [1,2], and discuss the intriguing physics and applications of hot metallic particles.
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