A metallic molybdenum dioxide with high stability for surface enhanced Raman spectroscopy

Qiqi Zhang, Xinshi Li, Qiang Ma, Qing Zhang, Hua Bai, Wencai Yi, Jingyao Liu, Jing Han and Guangcheng Xi ()
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Qiqi Zhang: Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine (CAIQ)
Xinshi Li: Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine (CAIQ)
Qiang Ma: Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine (CAIQ)
Qing Zhang: Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine (CAIQ)
Hua Bai: Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine (CAIQ)
Wencai Yi: Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University
Jingyao Liu: Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University
Jing Han: Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine (CAIQ)
Guangcheng Xi: Institute of Industrial and Consumer Product Safety, Chinese Academy of Inspection and Quarantine (CAIQ)

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Compared with noble metals, semiconductors with surface plasmon resonance effect are another type of SERS substrate materials. The main obstacles so far are that the semiconducting materials are often unstable and easy to be further oxidized or decomposed by laser irradiating or contacting with corrosive substances. Here, we report that metallic MoO2 can be used as a SERS substrate to detect trace amounts of highly risk chemicals including bisphenol A (BPA), dichloropheno (DCP), pentachlorophenol (PCP) and so on. The minimum detectable concentration was 10−7 M and the maximum enhancement factor is up to 3.75 × 106. To the best of our knowledge, it may be the best among the metal oxides and even reaches or approaches to Au/Ag. The MoO2 shows an unexpected high oxidation resistance, which can even withstand 300 °C in air without further oxidation. The MoO2 material also can resist long etching of strong acid and alkali.

Date: 2017
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DOI: 10.1038/ncomms14903

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