Green synthesized Ag/rGO embedded flexible cotton SERS substrate for detection of methylene blue

Abstract

AbstractAg/rGO nanocomposite SERS substrates are widely used for the detection of contaminations in water and food adulterants. In this work, we prosed a novel green route to synthesize Ag/rGO nanocomposite for SERS-based detection of methylene blue (MB). Ag/rGO nanocomposite is synthesized by simultaneous reduction of AgNO3and GO with the leaf extract of Jasmine fluminense. Further, the flexible SERS substrate is fabricated by directly coating the synthesized Ag/rGO nanocomposite on cotton fabric and used for SERS-based detection of MB. The SERS studies on MB show a linear response of 0.97 over a wide detection range of 10− 3to 10− 9M with a minimum detection limit of 10− 9M. The enhancement factor for MB at a concentration of 10− 9M is 5.33 × 105with a high signal-to-noise ratio of 31.69. This study emphasizes the potential of green synthesized Ag/rGO embedded flexible cotton SERS substrate for the traceable fingerprint detection of MB.