Plasmonic molybdenum trioxide quantum dots with noble metal-comparable surface enhanced Raman scattering. Issue 9 (16th February 2018)

• Record Type: Journal Article
• Authors: Zhang, Jiajia; Pan, Yunmei; Chen, Yufei; Lu, Hongbin
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 9(2018)
• Page Start: 2216
• Page End: 2220
• Publication Date: 2018-02-16
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc04807f
• Languages: English
• ISSNs: 2050-7526

Abstract

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. 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 10 6 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.