Ultrasensitive amperometric determination of hand, foot and mouth disease based on gold nanoflower modified microelectrode.

Abstract

Given the widespread use of point-of-care testing for diagnosis of disease, micro-scale electrochemical deoxyribonucleic acid (DNA) biosensors have become a promising area of research owing to its fast mass transfer, high current density and rapid response. In this study, a gold nanoparticles modified gold microelectrode (AuNPs/Au-Me) was constructed to determine the hand, foot and mouth disease (HFMD)-related gene. The noble metal nanoparticles modification yielded ca. 7.4-fold increase in electroactive surface area of microelectrode, and the signal for HFMD-related gene was largely magnified. Under optimal conditions, the biosensor exhibited salient selectivity and sensitivity with a low detection limit of 0.3 fM (S/N = 3), which is sufficient for clinical diagnosis of HFMD. Additionally, the developed AuNPs/Au-Me was successfully applied to determining the polymerase chain reaction (PCR) amplified products of target gene. Thus, the electrochemical DNA biosensor possesses great potential in early-stage diagnosis and long-term monitoring of various disease.

• Authors: Yu Zhong, Xiang-Guang Hu, Ai-Lin Liu, Yun Lei
• Journal: Analytica chimica acta (Anal Chim Acta) Vol. 1252 Pg. 341034 (Apr 29 2023) ISSN: 1873-4324 [Electronic] Netherlands
• PMID: 36935134 (Publication Type: Journal Article)
• Copyright: Copyright © 2023 Elsevier B.V. All rights reserved.

Chemical References

• Gold
• DNA

Topics

• Humans
• Gold
• Microelectrodes
• Hand, Foot and Mouth Disease (diagnosis)
• Metal Nanoparticles
• DNA (genetics)
• Biosensing Techniques
• Electrochemical Techniques
• Limit of Detection