γ-Fe2O3 modified exfoliated graphite flexible paper based non-enzymatic glucose sensor

Choudhary, P and Tiwari, C and Tiwari, A and Singh, VK and Laha, SS and Malhotra, BD and Dixit, A (2024) γ-Fe2O3 modified exfoliated graphite flexible paper based non-enzymatic glucose sensor. In: Materials Letters, 365 .

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Abstract

We report the γ-Fe2O3 modified exfoliated graphite (γ-Fe2O3@ExGCP) flexible paper electrode as a non-enzymatic glucose sensor. The γ-Fe2O3 was physically mixed with exfoliated graphite flakes, and mechanically pressed to get a thin sheet. The amperommetric analysis of γ-Fe2O3@ExGCP electrode shows that the sensor current increases with increasing glucose concentration. The impedance analysis of γ-Fe2O3@ExGCP substantiates the reduction in charge transfer resistance with increasing glucose concentration. The observed values of sensitivity for Ex-GCP and γ-Fe2O3@ExGCP electrodes are 3.51 µA mM-1cm�2 and 7.1 µA mM-1cm�2, respectively. The calculated LOD is 512 μM for γ-Fe2O3@ExGCP. Thus, γ-Fe2O3@ExGCP flexible electrode may be used for non-enzymatic glucose sensor with enhanced sensitivity. © 2024 Elsevier B.V.

Item Type:	Journal Article
Publication:	Materials Letters
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Charge transfer; Glucose; Glucose sensors; Graphite; Hematite, Carbon material; Current increase; Exfoliated graphite; Glucose concentration; Graphite flakes; Impedance analyze; Non-enzymatic glucose sensors; Sensor current; Thin sheet; �-fe2O3, Electrodes
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	08 Jul 2024 07:32
Last Modified:	08 Jul 2024 07:32
URI:	http://eprints.iisc.ac.in/id/eprint/84747

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