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Issue 39, 2017
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Full-spectrum volumetric solar thermal conversion via photonic nanofluids

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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 broadband solar thermal absorption via dilute nanofluids is still a daunting challenge. In this work, full-spectrum volumetric solar thermal conversion is demonstrated over a thin layer of the proposed ‘photonic nanofluids’. The underlying mechanism is found to be the photonic superposition of core resonances, shell plasmons, and core–shell 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 core–shell nanofluids. The extinction coefficient of Janus dimers with various configurations is also investigated to unveil the effects of particle couplings. This work provides the possibility to achieve full-spectrum volumetric solar thermal conversion, and may have potential applications in efficient solar energy harvesting and utilization.

Graphical abstract: Full-spectrum volumetric solar thermal conversion via photonic nanofluids

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Publication details

The article was received on 02 Jun 2017, accepted on 27 Jun 2017 and first published on 04 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR03912C
Citation: Nanoscale, 2017,9, 14854-14860
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    Full-spectrum volumetric solar thermal conversion via photonic nanofluids

    X. Liu and Y. Xuan, Nanoscale, 2017, 9, 14854
    DOI: 10.1039/C7NR03912C

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