Fabrication of a large-area, flexible micro-pyramid PET film SERS substrate and its application in the detection of dye in herbal tea. (14th March 2018)

• Record Type: Journal Article
• Authors: Liu, Xi; Huang, Meizhen; Chen, Jie; Kong, Lili; Wang, Keihui
• Is Part Of: Laser physics letters. Volume 15:Number 5(2018:May)
• Publication Date: 2018-03-14
• Subjects: flexible micro-pyramid SERS substrate -- R2R UV imprinting -- portable Raman spectrometer -- dye detection -- herbal tea; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aaa6ac
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: A simple method, based on a roll-to-roll ultraviolet micro-pyramid imprinting technique and a nanoparticle self-assembling process in aqueous solution, to fabricate a large-area, flexible surface-enhanced Raman scattering (SERS) polyethylene glycol terephthalate substrate is proposed. The SERS substrate is demonstrated to be of high sensitivity. The detection concentration of Rhodamine 6G (R6G) measured by a portable Raman spectrometer is down to 10 −9 mol l −1 . The relative standard deviation values of different spots and different substrates are less than 13%. In addition, the feasibility for rapid detection of dye in herbal tea based on this SERS substrate and a portable Raman spectrometer is investigated. Three industrial dyes are employed to simulate the dyeing process. It is presented that R6G of 4.8 × 10 − 7 g ml −1, malachite green of 10 −6 g ml −1 and Auramine O of 10 −6 g ml −1 in herbal tea could be detected rapidly. The experimental results imply that this method could be potentially applied in the field of dyed herbal tea detection.