Gold Coated Nanostructured Molybdenum Oxide Mercury Vapour Quartz Crystal Microbalance Sensor

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Abstract:

A novel mercury vapour sensor based on a quartz crystal microbalance has been developed using gold coated nano templates of molybdenum oxide. The molybdenum oxide layer was characterised using scanning electron microscopy and X-ray diffraction methods. Characterization data revealed that the molybdenum oxide nano templates consisted of hexagonal platelets which are an orthorhombic form of molybdenum oxide. Gold was used as a selective layer due to its high affinity to mercury and inertness to interfering gases. The sensor had a mercury response approximately 85% larger than that of a commercial gold sensor.

Keywords: GOLD; MERCURY; MOO3; NANOSTRUCTURE; QCM

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2008.031

Publication date: February 1, 2008

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