Development of GO/Co/Chitosan‐Based Nano‐Biosensor for Real‐Time Detection of D‐Glucose

Dong Sup Kim, Xiaoguang Yang, Ja Hyun Lee, Hah Young Yoo, Chulhwan Park, Seung Wook Kim, Jinyoung Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Electrochemical nano‐biosensor systems are popular in the industrial field, along with evaluations of medical, agricultural, environmental and sports analysis, because they can simultaneously perform qualitative and quantitative analyses with high sensitivity. However, real‐time detection using an electrochemical nano‐biosensor is greatly affected by the surrounding environment with the performance of the electron transport materials. Therefore, many researchers are trying to find good factors for real‐time detection. In this work, it was found that a composite composed of graphite oxide/cobalt/chitosan had strong stability and electron transfer capability and was applied to a bioelectrochemical nano‐biosensor with high sensitivity and stability. As a mediator‐modified electrode, the GO/Co/chitosan composite was electrically deposited onto an Au film electrode by covalent boding, while glucose oxidase as a receptor was immobilized on the end of the GO/Co/chitosan composite. It was confirmed that the electron transfer ability of the GO/Co/chitosan composite was excellent, as shown with power density analysis. In addition, the real‐time detection of D‐glucose could be successfully performed by the developed nano‐biosensor with a high range of detected concentrations from 1.0 to 15.0 mM. Furthermore, the slope value composed of the current, per the concentration of D‐glucose as a detection response, was significantly maintained even after 14 days.

Original languageEnglish
Article number464
JournalBiosensors
Volume12
Issue number7
DOIs
Publication statusPublished - 2022 Jul

Keywords

  • D‐glucose
  • GO/Co/chitosan
  • glucose oxidase
  • nano‐biosensor
  • real‐time detection

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biotechnology
  • Biomedical Engineering
  • Instrumentation
  • Engineering (miscellaneous)
  • Clinical Biochemistry

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