Multiphoton induced photoluminescence during time-resolved laser-induced incandescence experiments on silver and gold nanoparticles
| Autor: | Joel C. Corbin, Kyle J. Daun, Gregory J. Smallwood, Daniel J. Clavel, S. Robinson-Enebeli, Stanislav Musikhin, S. Talebi-Moghaddam, Anna Klinkova |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Laser-induced incandescence Physics::Optics General Physics and Astronomy Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Molecular physics law.invention Maschinenbau law Colloidal gold 0103 physical sciences Particle-size distribution Incandescence 0210 nano-technology Luminescence |
| Zdroj: | Journal of Applied Physics. 129:183107 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/5.0046702 |
| Popis: | In conventional time-resolved laser-induced incandescence (TiRe-LII) measurements, a laser pulse heats the nanoparticles within a probe volume of aerosol, and the particle size distribution and other characteristics are inferred from the observed incandescence decay rate, which is connected to the change in sensible energy through a spectroscopic model. There is strong evidence, however, that for some aerosol systems, the incandescence signal is contaminated with other non-incandescent emission sources. Recent TiRe-LII measurements on polydisperse aerosolized silver and gold nanoparticles energized with a 1064 nm laser pulse exhibit broadband emission that is temporally aligned with the temporal profile of the laser pulse, suggesting that the signal is due to non-thermal emission. One candidate for this emission phenomenon is multiphoton-induced upconversion luminescence, in which the conduction-band electron gas is heated up to an effective lattice temperature, resulting in luminescence due to high-energy intraband transitions. |
| Databáze: | OpenAIRE |
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