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

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Journal Article - Open Access

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Pennsylvania State University University Park United States

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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 polypropylene 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.

Subject Categories:

  • Non-electrical Energy Conversion
  • Thermodynamics
  • Miscellaneous Materials

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