Publication: Screen-printed graphene-based electrochemical sensors for a microfluidic device
Issued Date
2017-06-28
Resource Type
ISSN
17599679
17599660
17599660
Other identifier(s)
2-s2.0-85021699151
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Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Analytical Methods. Vol.9, No.24 (2017), 3689-3695
Suggested Citation
C. Karuwan, A. Wisitsoraat, P. Chaisuwan, D. Nacapricha, A. Tuantranont Screen-printed graphene-based electrochemical sensors for a microfluidic device. Analytical Methods. Vol.9, No.24 (2017), 3689-3695. doi:10.1039/c7ay00379j Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/42136
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Title
Screen-printed graphene-based electrochemical sensors for a microfluidic device
Abstract
© 2017 The Royal Society of Chemistry. This work presents a new method for mass fabrication of a new microfluidic device with integrated graphene-based electrochemical electrodes by the screen printing technique for in-channel amperometric detection. Graphene-based working and counter electrodes were fabricated by screen printing graphene paste on a glass substrate, followed by screen printing of a silver/silver chloride (Ag/AgCl) reference electrode. The screen-printed substrate was then bonded to a prefabricated polydimethylsiloxane (PDMS) sheet containing microchannels via oxygen plasma treatment. The developed microfluidic device was then applied for glutathione analysis in pharmaceutical products. The method offers effective and fast glutathione detection with good analytical features including a wide dynamic range (10-500 μM) and a low detection limit (3 μM). In addition, the screen printed graphene electrode (SPGE) exhibits a good stability in a microfluidic flow system and good repeatability for amperometric detection. The method has numerous advantages including low fabrication cost, high sensitivity, high throughput and satisfactory reproducibility. Thus, it holds great promise for advanced analytical applications.