Glucose oxidase-coated ZnO nanowires for glucose sensor applications

Kyung Min Noh, Yun Mo Sung

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Well-aligned Zinc oxide (ZnO) nanowires were synthesized on silicon substrates by a carbothermal evaporation method using a mixture of ZnO and graphite powder with Au thin film was used as a catalyst. The XRD results showed that as-prepared product is the hexagonal wurzite ZnO nanostructure and SEM images demonstrated that ZnO nanowires had been grown along the [0001] direction with hexagonal cross section. As-grown ZnO nanowires were coated with glucose oxidase (GOx) for glucose sensing. Glucose converted into gluconic acid by reaction with GOx and two electrons are generated. They transfer into ZnO nanowires due to the electric force between electrons and the positively charged ZnO nanostructures in PBS. Photoluminescence (PL) spectroscopy was employed for investigating the movements of electrons, and the peak PL intensity increased with the glucose concentration and became saturated when the glucose concentration is above 10 mM. These results demonstrate that ZnO nanostructures have potential applications in biosensors.

Original languageEnglish
Pages (from-to)669-672
Number of pages4
JournalKorean Journal of Materials Research
Volume18
Issue number12
DOIs
Publication statusPublished - 2008

Keywords

  • Glucose oxidase (GOx)
  • Glucose sensor
  • Photoluminescense (PL)
  • ZnO nanowires

ASJC Scopus subject areas

  • Materials Science(all)

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