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In-situ synthesis of silver nanoparticles on porous silicon nanostructure through galvanic displacement reaction and its application in construction of glucose screen printed sensor
Date
2018-10-01
Author
Allahnouri, Farzad
Farhadi, Khalil
Eskandari, Habibollah
Molaei, Rahim
Abarghoui, Mehdi Mokhtari
Forough, Mehrdad
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In this work, a new nanocomposite as silver nanoparticles (AgNPs)@ porous silicon (PSi) was synthesised through a simple galvanic displacement reaction between silver ions and silicon in the presence of hydrofluoric acid. The as-prepared nanocomposites were characterised via field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy and electrochemical methods. Since the nanocomposite showed a greatly enhanced electrocatalytic activity towards the glucose oxidation in alkaline solution, Ag nanoparticles supported on PSi flour were used as a performance modifier in the construction of a new amperometric glucose screen-printed carbon electrode. The enzymatic free glucose sensor based on AgNPs@PSi exhibited a wide linear dynamic range of 1 x 10(-6)-45.7 x 10(-3) M, with a detection limit of 6 x 10(-7) M at a signal-to-noise ratio of 3, and fast response (<3 s). Also, the response of the proposed sensor was selective towards glucose in the presence of common species such as ascorbic acid, dopamine, uric acid and Cl- ions. Finally, the sensor was successfully applied to determine glucose in human serum samples.
URI
https://hdl.handle.net/11511/90414
Journal
MICRO & NANO LETTERS
DOI
https://doi.org/10.1049/mnl.2018.5242
Collections
Department of Chemistry, Article
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F. Allahnouri, K. Farhadi, H. Eskandari, R. Molaei, M. M. Abarghoui, and M. Forough, “In-situ synthesis of silver nanoparticles on porous silicon nanostructure through galvanic displacement reaction and its application in construction of glucose screen printed sensor,”
MICRO & NANO LETTERS
, pp. 1431–1436, 2018, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/90414.