Highly ordered nanoporous carbon films with tunable pore diameters and their excellent sensing properties

Lichao Jia, Geoffrey Lawrence, V. V. Balasubramanian, Goeun Choi, Jin Ho Choy, Aboubakr M. Abdullah, Ahmed Elzatahry, Katsuhiko Ariga, Ajayan Vinu

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Ordered porous carbon films with tunable pore diameters, immobilized with glucose oxidase (GOD) have been fabricated and employed for the construction of a biosensor for glucose molecules. The as-prepared porous films have large specific surface areas and highly ordered porous structure with uniform pore sizes, which are critical for the immobilization of large amounts of GOD and support the promotion of heterogeneous electron transfer. The developed biosensors give enough room for the encapsulation of a high amount of GOD molecules and show excellent biosensing performance with a linear response to glucose concentration ranging from 0.5 to 9 mm and a detection limit of 1.5 mm . It is also demonstrated that the sensitivity of the biosensor can be easily tuned by modulating the pore size of carbon film as it dictates the amount of immobilization of GOD in the porous channels. The fabricated carbon-film-based biosensor has a good stability and a high reproducibility, which opens the gateway for the commercialization of this excellent technology.

Original languageEnglish (US)
Pages (from-to)697-703
Number of pages7
JournalChemistry - A European Journal
Volume21
Issue number2
DOIs
StatePublished - Jan 2 2015

Keywords

  • Biosensors
  • Carbon
  • Nanostructures
  • Porous materials
  • Thin films

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