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Graphene Paper-Gold Nanostructured Electrodes Obtained by Laser Dewetting for High Sensitive Non-Enzymatic Glucose Sensing

1
Department of Physics and Astronomy “Ettore Majorana”, University of Catania, via S. Sofia 64, 95123 Catania, Italy
2
CNR-IMM via S. Sofia 64, 95123 Catania, Italy
*
Author to whom correspondence should be addressed.
Presented at the 7th International Symposium on Sensor Science, Napoli, Italy, 9–11 May 2019.
Proceedings 2019, 15(1), 1; https://doi.org/10.3390/proceedings2019015001
Published: 19 June 2019
(This article belongs to the Proceedings of 7th International Symposium on Sensor Science)
Electrodes for non-enzymatic glucose sensing based on gold nanostructures onto graphene paper (GP-AuNPs) have been obtained inducing dewetting, by laser annealing, of 8 nm-thick Au layer deposited by sputtering. Molten-phase dewetting of gold layer, which produces the formation of spherical nanoparticles (AuNPs), was achieved by nanosecond laser annealing using a pulsed (12 ns) Nd: yttrium aluminum garnet YAG laser operating at 532 nm. The Surface of the electrode presents gold rich regions consisting of graphene nanoplatelets covered by spherical AuNPs. The sizes of AuNPs are in the range of 10–150 nm. Glucose was detected at a potential of 0.17 V vs SCE, which corresponds to the intense peak of two electrons oxidation. Highest sensitivity of 600 µA mM−1 cm−2 of glucose detection was obtained. The resulting sensitivity, detection limit and linear range of glucose detection are very promising since comparable to the actual state of art results for nanostructured gold electrodes which are, however, produced by complex multi-steps processes.
Keywords: Graphene paper; Gold nanoparticles; Dewetting; Laser annealing; Electrochemical Glucose sensing Graphene paper; Gold nanoparticles; Dewetting; Laser annealing; Electrochemical Glucose sensing
MDPI and ACS Style

Scandurra, A.; Ruffino, F.; Grimaldi, M.G. Graphene Paper-Gold Nanostructured Electrodes Obtained by Laser Dewetting for High Sensitive Non-Enzymatic Glucose Sensing. Proceedings 2019, 15, 1. https://doi.org/10.3390/proceedings2019015001

AMA Style

Scandurra A, Ruffino F, Grimaldi MG. Graphene Paper-Gold Nanostructured Electrodes Obtained by Laser Dewetting for High Sensitive Non-Enzymatic Glucose Sensing. Proceedings. 2019; 15(1):1. https://doi.org/10.3390/proceedings2019015001

Chicago/Turabian Style

Scandurra, Antonino; Ruffino, Francesco; Grimaldi, Maria Grazia. 2019. "Graphene Paper-Gold Nanostructured Electrodes Obtained by Laser Dewetting for High Sensitive Non-Enzymatic Glucose Sensing" Proceedings 15, no. 1: 1. https://doi.org/10.3390/proceedings2019015001

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