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A full-spectrum-absorption from nickel sulphide nanoparticles for efficient NIR-II window photothermal therapy

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Abstract

Near-infrared (NIR) light has been widely applied in the field of photothermal therapy (PTT). Recent advances in the light wavelength for efficient cancer PTT have gradually shifted from the first NIR (NIR-I) biowindow (700–1000 nm) to the second NIR (NIR-II) biowindow (1000–1350 nm) owing to its intrinsic deeper tissue penetration ability and a higher maximum permissible exposure (MPE) value. Herein, we have prepared nickel sulphide (Ni9S8) nanoparticles (NPs) with a full-spectrum-absorption (400 nm–1100 nm) in the NIR region. By a fair comparison, it is found that the PTT using the NPs upon irradiation from an NIR-II (i.e., 1064 nm) laser is more efficient than that from an NIR-I (i.e., 808, 915, and 976 nm) laser. The large mass extinction coefficient value (22.18 L g−1 cm−1) and high photothermal conversion efficiency (46%) at 1064 nm make these NPs promising candidates for NIR-II photo-thermal therapy. This study will benefit future exploration and optimization of nickel-based photoabsorbers utilizing NIR-II light for photothermal applications.

Graphical abstract: A full-spectrum-absorption from nickel sulphide nanoparticles for efficient NIR-II window photothermal therapy

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Publication details

The article was received on 11 May 2019, accepted on 14 Sep 2019 and first published on 04 Oct 2019


Article type: Paper
DOI: 10.1039/C9NR04005F
Nanoscale, 2019, Advance Article

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    A full-spectrum-absorption from nickel sulphide nanoparticles for efficient NIR-II window photothermal therapy

    Z. Lei, W. Zhang, B. Li, G. Guan, X. Huang, X. Peng, R. Zou and J. Hu, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR04005F

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