A Redox Cu(II)-Graphene Oxide Modified Screen Printed Carbon Electrode As a Cost-Effective and Versatile Sensing Platform for Electrochemical Label-Free Immunosensor and Non-enzymatic Glucose Sensor
Overview
Authors
Affiliations
A novel copper (II) ions [Cu(II)]-graphene oxide (GO) nanocomplex-modified screen-printed carbon electrode (SPCE) is successfully developed as a versatile electrochemical platform for construction of sensors without an additionally external redox probe. A simple strategy to prepare the redox GO-modified SPCE is described. Such redox GO based on adsorbed Cu(II) is prepared by incubation of GO-modified SPCE in the Cu(II) solution. This work demonstrates the fabrications of two kinds of electrochemical sensors, i.e., a new label-free electrochemical immunosensor and non-enzymatic sensor for detections of immunoglobulin G (IgG) and glucose, respectively. Our immunosensor based on square-wave voltammetry (SWV) of the redox GO-modified electrode shows the linearity in a dynamic range of 1.0-500 pg.mL with a limit of detection (LOD) of 0.20 pg.mL for the detection of IgG while non-enzymatic sensor reveals two dynamic ranges of 0.10-1.00 mM (sensitivity = 36.31 μA.mM.cm) and 1.00-12.50 mM (sensitivity = 3.85 μA.mM.cm) with a LOD value of 0.12 mM. The novel redox Cu(II)-GO composite electrode is a promising candidate for clinical research and diagnosis.
Glucose and UA sensing based on Cu nanoparticle decorated Nif/GO flexible electrode.
Shi F, Hu S, Li J, Wang F, Chen N Mikrochim Acta. 2023; 191(1):7.
PMID: 38052754 DOI: 10.1007/s00604-023-06066-6.
Zhu L, Ma J, Jin D, Zhang Y, Wu S, Xu A Anal Sci. 2023; 39(8):1391-1403.
PMID: 37227625 PMC: 10209936. DOI: 10.1007/s44211-023-00351-3.
Carbon Nanomaterials-Based Screen-Printed Electrodes for Sensing Applications.
Matias Silva R, Dias da Silva A, Camargo J, de Castro B, Meireles L, Silva P Biosensors (Basel). 2023; 13(4).
PMID: 37185528 PMC: 10136782. DOI: 10.3390/bios13040453.
Chanarsa S, Jakmunee J, Ounnunkad K Front Cell Infect Microbiol. 2022; 12:916357.
PMID: 36389169 PMC: 9646986. DOI: 10.3389/fcimb.2022.916357.
Electrospun nanofiber-based glucose sensors for glucose detection.
Du Y, Zhang X, Liu P, Yu D, Ge R Front Chem. 2022; 10:944428.
PMID: 36034672 PMC: 9403008. DOI: 10.3389/fchem.2022.944428.