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Plasmonic molybdenum trioxide quantum dots with noble metal-comparable surface enhanced Raman scattering

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Abstract

We propose a one-pot solution strategy to prepare sub-stoichiometric MoO3 quantum dots (MoO3−χ-QDs) with single-layered, vacancy-containing and few-crystalline features, which display surface plasmon resonance (SPR) in both visible and near-infrared regions without illumination. In a biosensing system, they show high sensitivity and optimum SPR absorption, differing from that of MoO3 nanosheets. Importantly, MoO3−χ-QDs show outstanding surface enhanced Raman scattering (SERS) performance (with an enhancement factor up to 106 and a detection limit as low as 10−9 M), which outperforms previously reported semiconductors and is comparable to noble metals. This remarkable SERS activity is the first obtained in metal oxide QDs, which opens a promising avenue for the development of high-sensitivity, non-noble metal-based SERS substrates.

Graphical abstract: Plasmonic molybdenum trioxide quantum dots with noble metal-comparable surface enhanced Raman scattering

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Publication details

The article was received on 21 Oct 2017, accepted on 06 Feb 2018 and first published on 06 Feb 2018


Article type: Communication
DOI: 10.1039/C7TC04807F
Citation: J. Mater. Chem. C, 2018, Advance Article
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    Plasmonic molybdenum trioxide quantum dots with noble metal-comparable surface enhanced Raman scattering

    J. Zhang, Y. Pan, Y. Chen and H. Lu, J. Mater. Chem. C, 2018, Advance Article , DOI: 10.1039/C7TC04807F

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