Wu, W., Liu, L., Dai, Z., Liu, J., Yang, S., Zhou, L., Xiao, X., Jiang, C. and Roy, V. A. L. (2015) Low-cost, disposable, flexible and highly reproducible screen printed SERS substrates for the detection of various chemicals. Scientific Reports, 5, 10208. (doi: 10.1038/srep10208) (PMID:25974125) (PMCID:PMC4431467)
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Abstract
Ideal SERS substrates for sensing applications should exhibit strong signal enhancement, generate a reproducible and uniform response and should be able to fabricate in large-scale and low-cost. Herein, we demonstrate low-cost, highly sensitive, disposable and reproducible SERS substrates by means of screen printing Ag nanoparticles (NPs) on a plastic PET (Polyethylene terephthalate) substrates. While there are many complex methods for the fabrication of SERS substrates, screen printing is suitable for large-area fabrication and overcomes the uneven radial distribution. Using as-printed Ag substrates as the SERS platform, detection of various commonly known chemicals have been done. The SERS detection limit of Rhodamine 6G (R6G) is higher than the concentration of 1 × 10−10 M. The relative standard deviation (RSD) value for 784 points on the detection of R6G and Malachite green (MG) is less than 20% revealing a homogeneous SERS distribution and high reproducibility. Moreover, melamine (MA) is detected in fresh liquid-milk without additional pretreatment, which may accelerate the application of rapid on-line detection of MA in liquid milk. Our screen printing method highlights the use of large-scale printing strategies for the fabrication of well-defined functional nanostructures with applications well beyond the field of SERS sensing.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Vellaisamy, Professor Roy |
Authors: | Wu, W., Liu, L., Dai, Z., Liu, J., Yang, S., Zhou, L., Xiao, X., Jiang, C., and Roy, V. A. L. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Scientific Reports |
Publisher: | Nature Publishing Group |
ISSN: | 2045-2322 |
ISSN (Online): | 2045-2322 |
Copyright Holders: | Copyright © 2015 The Authors |
First Published: | First published in Scientific Reports 5:10208 |
Publisher Policy: | Reproduced under a Creative Commons licence |
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