Development of disposable electrode for the detection of mosquito-borne viruses

Development of disposable, rapid, and convenient biosensor with high sensitivity and reliability is the most desired method of viral disease prevention. To achieve this goal, in this work, a practical impedimetric biosensor has been implemented into a disposable electrode on a screen-printed carbon electrode (SPCE) for the detection of two mosquito-borne viruses. The biosensor fabrication has step-wisely carried out on the disposable electrode surface at room temperature: starting from conductive film formation, physical binding of the gold nanoparticles (AuNPs)-polyaniline (PAni) into the conductive film, and biofunctionalization. To get the maximum efficiency of the antibody, biotinylated antibody has been conjugated on the surface of AuNP-PAni/PAni-SPCE via the streptavidin-biotin conjugation method which is a critical factor for the high sensitivity. Using the antibody-antigen interaction, this disposable electrode has designed to detect mosquito-borne infectious viruses, Chikungunya virus (CHIKV), and Zika virus (ZIKV) separately in a wide linear range of 100 fg mL(-1) to 1 ng mL(-1) with a low detection limit of 1.33 and 12.31 fg mL(-1), respectively.

Automated summary

To prevent viral diseases, the development of a disposable, rapid, and convenient biosensor with high sensitivity and reliability is highly desired. In this study, a practical impedimetric biosensor has been created on a disposable electrode for the detection of two mosquito-borne viruses. The biosensor fabrication involves the formation of a conductive film, physical binding of gold nanoparticles-polyaniline, and biofunctionalization. The disposable electrode has been designed to detect Chikungunya virus and Zika virus separately with a wide linear range and low detection limits.