期刊
MOLECULES
卷 23, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/molecules23051234
关键词
photothermal; nanoparticles; heat transfer
资金
- Army Research Office [W911NF-16-1-0123]
- National Science Foundation Research Experience for Undergraduates program [CHE-16-59679]
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.
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