Abstract
We studied a Surface-enhanced Raman scattering (SERs) film by self-assembled deposition of Ag nanoparticles on the surface of PPy@PEDOT:PSS films to detect melamine molecules. The PPy@PEDOT:PSS film was prepared using an electrochemical polymerization method in a mixture solution of PPy and PEDOT:PSS. Then, Ag nanoparticles were directly deposited on the surface of PPy@PEDOT:PSS films by a chemical self-assembly method as an active SERs substrate to detect melamine molecules. The results showed that the density of Ag nanoparticles on the surface of PPy@PEDOT:PSS film was gradually increased due to the increase of depositional time of Ag nanoparticles. Accordingly, The SERs effect was also substantially enhanced. The signal of melamine was increased up to 440 times. The melamine molecules at 6.4 ng/ml concentration could be clearly identified. This preparing method of SERs film and detecting method of melamine molecules provide a new strategy for the design and application of chemical sensors and bio-sensors.
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Funding
Project supported by the National Natural Science Foundation of China (Grant No. 61865002), Guizhou Province Science and Technology Support Plan (Grant Nos. QKHZ[2017]2887 and QKEPTRC[2018]5616), Central Government of China Guiding Local Science and Technology Development Plan (Grant No. QKZYD[2017]4004), the major research project of innovative group of Guizhou provice (Grant No. 2018-13), and Talents of Guizhou science and technology cooperation platform (Grant No. NO.[2018]5781).
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He, S., Chang, M., Liu, P. et al. Self-assembled deposition of Ag nano-particles on PPy@PEDOT:PSS films to detect melamine molecules. Appl. Phys. A 126, 953 (2020). https://doi.org/10.1007/s00339-020-04130-z
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DOI: https://doi.org/10.1007/s00339-020-04130-z