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

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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Zhang Q,Li X,Ma Q,Zhang Q,Bai H,Yi W,Liu J,Han J,Xi G

doi

10.1038/ncomms14903

subject

Has Abstract

pub_date

2017-04-24 00:00:00

pages

14903

issn

2041-1723

pii

ncomms14903

journal_volume

8

pub_type

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