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5 March 2021 Photothermal effects in plasmonic assisted photocatalysis: a parametric study
Ieng-Wai Un, Yonatan Sivan
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Proceedings Volume 11694, Photonic and Phononic Properties of Engineered Nanostructures XI; 116940D (2021) https://doi.org/10.1117/12.2582733
Event: SPIE OPTO, 2021, Online Only
Abstract
Recently, it has been suggested that chemical reactions can be facilitated by using mm-scale composites of plasmonic metal nanoparticles on porous oxides. This effect was shown recently to be predominantly associated with the heating induced by illumination. In this study, we study the sensitivity of the temperature rise to various parameters. We show that, the temperature rise in photocatalysts is typically weakly-dependent on the illumination wavelength, pulse duration, particle shape, size and density but is strongly sensitive to the beam size and the host thermal conductivity. Our results indicate that although plasmonic nanoparticles are thought of as nanoscale heat sources, the heat generation from which does not differ so much from macroscopic heat sources. On a more general level, this work is instrumental in uprooting some common misconceptions associated with the role of thermal effects in applications that rely on heat generation from a large number of particles.
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Ieng-Wai Un and Yonatan Sivan "Photothermal effects in plasmonic assisted photocatalysis: a parametric study", Proc. SPIE 11694, Photonic and Phononic Properties of Engineered Nanostructures XI, 116940D (5 March 2021); https://doi.org/10.1117/12.2582733
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KEYWORDS
Photocatalysis
Plasmonics
Photothermal effect
Metals
Nanoparticles
Particles
Thermal effects
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