Nanoscale enzyme reactors and enzyme precipitate coatings of glucose oxidase for biosensor and biofuel cell applications

Chulmin Jeon, Jae Kim, Jungbae Kim, Su Ha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we immobilize glucose oxidase (GOx) using two different enzyme immobilization techniques. First, nanoscale enzyme reactors (NERs) of GOx in conductive mesoporous carbons were prepared in a two-step process of enzyme adsorption and follow-up enzyme crosslinking. MSU-F-C, a mesoprous carbon, has a bottleneck pore structure with mesocellular pores of 26 nm connected with window mesopores of 17 nm. This structure enables the ship-in-a-bottle mechanism of NERs, which effectively prevents the crosslinked enzymes in mesocellular pores from leaching through the smaller window mesopores. Secondly, highly stable enzyme precipitate coatings (EPCs) on carbon nanotubes (CNTs) were prepared by precipitating GOx molecules in the presence of ammonium sulfate, then cross-linking the precipitated GOx aggregates on covalently attached enzyme molecules on the surface of CNTs. We used these NERs and EPCs of GOx as the enzyme electrode for both biosensor and biofuel cell applications. In this paper, their electrochemical performances and stability will be tested in terms of their sensitivity for detecting GOx and power density output for converting GOx into electrical power.

Original languageEnglish
Title of host publication11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings
Publication statusPublished - 2011
Event2011 AIChE Annual Meeting, 11AIChE - Minneapolis, MN, United States
Duration: 2011 Oct 162011 Oct 21

Publication series

Name11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings

Other

Other2011 AIChE Annual Meeting, 11AIChE
CountryUnited States
CityMinneapolis, MN
Period11/10/1611/10/21

ASJC Scopus subject areas

  • Chemical Engineering(all)

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  • Cite this

    Jeon, C., Kim, J., Kim, J., & Ha, S. (2011). Nanoscale enzyme reactors and enzyme precipitate coatings of glucose oxidase for biosensor and biofuel cell applications. In 11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings (11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings).