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Molecules 2018, 23(5), 1234; https://doi.org/10.3390/molecules23051234

Photothermal Effectiveness of Magnetite Nanoparticles: Dependence upon Particle Size Probed by Experiment and Simulation

Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
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Academic Editors: Joan Estelrich and Maria Antònia Busquets
Received: 23 April 2018 / Revised: 16 May 2018 / Accepted: 16 May 2018 / Published: 22 May 2018
(This article belongs to the Special Issue Photothermal Agents in Therapy)
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Abstract

The photothermal effect of nanoparticles has proven efficient for driving diverse physical and chemical processes; however, we know of no study addressing the dependence of efficacy on nanoparticle size. Herein, we report on the photothermal effect of three different sizes (5.5 nm, 10 nm and 15 nm in diameter) of magnetite nanoparticles (MNP) driving the decomposition of poly(propylene carbonate) (PPC). We find that the chemical effectiveness of the photothermal effect is positively correlated with particle volume. Numerical simulations of the photothermal heating of PPC supports this observation, showing that larger particles are able to heat larger volumes of PPC for longer periods of time. The increased heating duration is likely due to increased heat capacity, which is why the volume of the particle functions as a ready guide for the photothermal efficacy. View Full-Text
Keywords: photothermal; nanoparticles; heat transfer photothermal; nanoparticles; heat transfer
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Johnson, R.J.G.; Schultz, J.D.; Lear, B.J. Photothermal Effectiveness of Magnetite Nanoparticles: Dependence upon Particle Size Probed by Experiment and Simulation. Molecules 2018, 23, 1234.

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