Issue 39, 2020, Issue in Progress

Low-cost electrochemical detection of l-tyrosine using an rGO–Cu modified pencil graphite electrode and its surface orientation on a Ag electrode using an ex situ spectroelectrochemical method

Abstract

A low cost reduced graphene oxide–copper hybrid nano thin-film modified Pencil Graphite Electrode has been employed to detect the L-tyrosine enantiomer. The free-standing rGO–Cu hybrid nano-thin film was prepared by a simple one-step liquid–liquid interface method. Electrochemical Cyclic Voltammetry, Differential Pulse Voltammetry, pH-dependent and scan rate dependent studies on bare PGE, Cu, rGO, and rGO–Cu for L-tyrosine have been explained in detail. The rGO–Cu modified PGE based biosensor exhibits good detection of L-tyrosine. The linear range detection limit was estimated to be 1 × 10−7 M. The calculated sensitivity is 0.4 μA ppm−1 mm2. This electroactive biosensor is easily fabricated and controlled and is cost-effective. The surface orientation of L-tyrosine on the Ag electrode at a particular potential and its comparison with vibrational DFT calculations have been studied for the first time.

Graphical abstract: Low-cost electrochemical detection of l-tyrosine using an rGO–Cu modified pencil graphite electrode and its surface orientation on a Ag electrode using an ex situ spectroelectrochemical method

Article information

Article type
Paper
Submitted
04 May 2020
Accepted
03 Jun 2020
First published
16 Jun 2020
This article is Open Access
Creative Commons BY license

RSC Adv., 2020,10, 22871-22880

Low-cost electrochemical detection of L-tyrosine using an rGO–Cu modified pencil graphite electrode and its surface orientation on a Ag electrode using an ex situ spectroelectrochemical method

C. Kavitha, K. Bramhaiah and N. S. John, RSC Adv., 2020, 10, 22871 DOI: 10.1039/D0RA04015K

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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