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SHYMAA S MEDANY
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Volume 45 All articles Published: 29 March 2022 Article ID 0062
Pd-Co$_3$O$_4$-based nanostructures for the development of enzyme-free glucose sensor
ABDUL SATTAR CHANG ANEELA TAHIRA ZULIFQAR ALI SOLANGI ABDUL GHAFFAR SOLANGI MAZHAR HUSSAIN IBUPOTO FOUZIA CHANG SHYMAA S MEDANY AYMAN NAFADY AMAL KASRY MAGNUS WILLANDER ZAFAR HUSSAIN IBUPOTO
In this study, we report enzyme-free glucose sensors based on palladium (Pd) nanoparticles deposited onto Co$_3$O$_4$ nanostructures. A simple, low-temperature aqueous method was used for the fabrication of Co$_3$O$_4$ nanostructures.Then, Pd nanoparticles were decorated onto Co$_3$O$_4$ nanostructures using the ultraviolet reduction method. Morphology, elemental composition and crystalline features of the proposed composite nanostructures were investigated by powderX-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy techniques. Cyclic voltammetry and linear sweep voltammetry were used to investigate the electrochemical behaviour of Pd–Co$_3$O$_4$ nanostructures during glucose sensing. The proposed nanostructures showed excellent electrochemical activity for the quantitative detection of glucose at a potential of 0.6 V
vs . Ag/AgCl. Importantly, the fabricated enzyme-free glucose sensor shows a linear response over the range of 1–6.0 mM glucose, with a limit of detection of 0.01 mM. The interference study was also carried out to probe the selectivity of Pd–Co$_3$O$_4$ nanostructures towards glucose detection in the presence of differentinterfering substances. The combined results attest that the as-synthesized Pd–Co$_3$O$_4$ nanostructures are highly stable and selective for the detection of glucose, suggesting their great potential for the quantitative determination of glucose in different biological fluids.
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Bulletin of Materials Science
Volume 46, 2023
All articles
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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