Graphene Oxide - Gold Nanostar based sensor for chemiresistor and SERS sensing

As part of a bigger project of building a multimodal electronic nose for 2,4 di-nitro toluene and 2,4,6 trinitrotoluene, the objective of this study was to develop a novel type of sensor to detect specific analytes and their concentrations. A chemiresistor based system involving gold and graphene nanostructures is proposed so that it has both chemiresistive and SERS sensing capabilities (fig. 1). It was expected that if succeeded, the sensor would show clearly the orthogonality between the optical SERS reading and the chemiresistive reading in terms of sensing analytes. This study hopes to eventually integrate chemiresistor sensing and SERS sensing for selective, qualitative and quantitative sensing of volatile organic compounds, especially explosives, but it is applicable to a wide range of sensing