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Full-spectrum volumetric solar thermal conversion via photonic nanofluids

Abstract

Volumetric solar thermal conversion is an emerging technique for a plethora of applications such as solar thermal power generation, desalination, and solar water splitting. However, achieving a broadband solar thermal absorption via dilute nanofluids is still a daunting challenge. In this work, the full-spectrum volumetric solar thermal conversion is demonstrated over a thin layer of proposed ‘photonic nanofluids’. The underlying mechanism is found to lie in the photonic superposition of core resonances, shell plasmons, and coreshell resonances at different wavelengths, whose coexistence is enabled by the broken symmetry of specially designed composite nanoparticles, i.e., Janus nanoparticles. The solar thermal conversion efficiency can be improved by 10.8% compared with coreshell nanofluids. The extinction coefficient of Janus dimers with various configurations is also investigated to unveil the effects of particle couplings. This work opens the possibility to achieve full-spectrum volumetric solar thermal conversion, and may have potential applications in efficient solar energy harvesting and utilization.

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Publication details

The article was accepted on 27 Jun 2017 and first published on 04 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR03912C
Citation: Nanoscale, 2017, Accepted Manuscript
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    Full-spectrum volumetric solar thermal conversion via photonic nanofluids

    X. Liu and Y. Xuan, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03912C

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