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Sensors and actuators. B, Chemical v.259, 2018년, pp.59 - 63   SCI SCIE SCOPUS
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Molybdenum oxide nanosheets meet ascorbic acid: Tunable surface plasmon resonance and visual colorimetric detection at room temperature

Li, Rui (School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang, 621010, PR China ) ; An, Hongjie (Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore ) ; Huang, Wei (School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang, 621010, PR China ) ; He, Yi (School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang, 621010, PR China ) ;
  • 초록  

    Abstract Here we report a simple, rapid, and environmentally friendly method for the preparation of non-stoichiometric MoO 3 (MoO 3-x ) nanosheets using ascorbic acid (AA) as a reducing agent under an acidic environment at room temperature. The resultant MoO 3-x nanosheets show an intense blue color and strong localized surface plasmon resonance (LSPR) in the visible and near-infrared region, which can be tuned by changing the pH values of the preparation solution. The hydrogen ions intercalate into the lattice of MoO 3 and bond to oxygen atoms to generate water molecules, and the electron of the AA is transferred to Mo cations, which results in the reduction of Mo 6+ and formation of oxygen vacancies, giving rise to the LSPR. Additionally, a visual colorimetric assay has been developed for the detection of AA in aqueous solutions and serum samples. The absorbance at 820 nm is linearly related to the logarithm of the AA concentration in the range of 1 mM–100 mM with a limit of detection of 0.09 mM at a signal-to-noise ratio of 3. Highlights A environmentally friendly strategy is developed for preparation of plasmonic MoO 3-x nanosheets. A visual colometric assay for ascorbic acid (AA) based on the plasmonic MoO 3-x nanosheets is established. This assay is successfully applied for the detection of AA in real serum samples.


  • 주제어

    Localized surface plasmon resonance .   MoO3-x nanosheets .   Ascorbic acid .   Tunability.  

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