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Issue 16, 2016
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Plasmonic near-touching titanium oxide nanoparticles to realize solar energy harvesting and effective local heating

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Abstract

Through the excitation of plasmon resonance, the energy of plasmonic nanoparticles either reradiates through light scattering or decays into energetic electrons (absorption). The plasmon-induced absorption can greatly enhance the efficiency of solar energy harvesting, local heating, photodetection and photocatalysis. Here, we demonstrate that heavily self-doped titanium oxide nanoparticles (TiO1.67 analogue arising from oxygen vacancies in rutile TiO2) with the plasmon resonance dominated by an interband transition shows strong absorption to build a broadband perfect absorber in the wavelength range from 300 to 2000 nm covering the solar irradiation spectrum completely. The absorptivity of the fabricated array is greater than 90% in the whole spectral range. And the broadband and strong absorption is due to the plasmon hybridization and hot spot generation from near-touching TiO1.67 nanoparticles with different sizes. What is more, the local heating of a TiO1.67 nanoparticle layer is fast and effective. The temperature increases quickly from 30 °C to 80 °C within 200 seconds. This local heating can realize rapid solar-enabled evaporation which can find applications in large-scale distillation and seawater desalination. These findings actually open a pathway for applications of these newly developed plasmonic materials in the energy and environment fields.

Graphical abstract: Plasmonic near-touching titanium oxide nanoparticles to realize solar energy harvesting and effective local heating

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Publication details

The article was received on 15 Feb 2016, accepted on 24 Mar 2016 and first published on 25 Mar 2016


Article type: Paper
DOI: 10.1039/C6NR01295G
Citation: Nanoscale, 2016,8, 8826-8838
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    Plasmonic near-touching titanium oxide nanoparticles to realize solar energy harvesting and effective local heating

    J. Yan, P. Liu, C. Ma, Z. Lin and G. Yang, Nanoscale, 2016, 8, 8826
    DOI: 10.1039/C6NR01295G

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