Time-Resolved Investigations of the Cooling Dynamics of Metal Nanoparticles: Impact of Environment
| Autor: | Natalia Del Fatti, Tatjana Stoll, Fabrice Vallée, Sergio Rodal-Cedeira, Aurélien Crut, Isabel Pastoriza-Santos, Paolo Maioli |
|---|---|
| Přispěvatelé: | Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Departamento de Quimica Fisica - Universidade de Vigo, Spain, Universidade de Vigo |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
genetic structures Interfaces Metal nanoparticles Physics::Optics Nanoparticle Nanotechnology [SPI]Engineering Sciences [physics] Colloid Thermal [CHIM]Chemical Sciences Physical and Theoretical Chemistry [PHYS]Physics [physics] Ethanol Surfaces Coatings and Films Electronic Optical and Magnetic Materials Wavelength General Energy Chemical physics Colloidal gold Nanoparticles Probes sense organs Transient (oscillation) Ultrashort pulse Beam (structure) |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2015, 119 (22), pp.12757-12764. ⟨10.1021/acs.jpcc.5b03231⟩ |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.5b03231 |
| Popis: | International audience; Tunable two-color ultrafast pump–probe experiments are performed on colloidal metal nanospheres in water and ethanol, and the results are interpreted through a model including thermal dynamics in both the nanoparticle and its environment. Transient optical signals measured for gold nanoparticles in ethanol display a complex temporal response strongly dependent on the wavelength of the probe beam. We demonstrate that its origin is related to a large contribution of liquid environment transient heating to the optical response, in contrast to the usual assumption that optical transmission changes reflect the evolution of nanoparticle temperature only. Accounting for this contribution enables an accurate measurement of thermal conductances at gold–ethanol and gold–water interfaces. Moreover, the thermal dynamics of the solvent can be selectively probed through a specific choice of probe wavelength. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|