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Fabrication of polymeric ionic liquid/graphene nanocomposite for glucose oxidase immobilization and direct electrochemistry
- Source :
-
Biosensors & Bioelectronics . Jan2011, Vol. 26 Issue 5, p2632-2637. 6p. - Publication Year :
- 2011
-
Abstract
- Abstract: A novel polymeric ionic liquid functionalized graphene, poly(1-vinyl-3-butylimidazolium bromide)-graphene (denoted as poly(ViBuIm+Br−)-G), was synthesized. FTIR, UV–vis spectra and TEM were used to characterize the formation of as synthesized nanocomposites. Due to the modification of the polymeric ionic liquid, poly(ViBuIm+Br−)-G can not only be dispersed well in aqueous solutions to form a homogeneous colloidal suspension of individual nanosheets, but also exhibit a strong positive charge. Based on self-assembly, the negatively charged glucose oxidase (GOD) was immobilized onto the poly(ViBuIm+Br−)-G to form a GOD/poly(ViBuIm+Br−)-G/glassy carbon (GC) electrode under mild conditions. With the advantage of both poly(ViBuIm+Br−) and graphene, poly(ViBuIm+Br−)-G can provide a favorable and conductive microenvironment for the immobilized GOD and thus promote their direct electron transfer at the GC electrode. Furthermore, the GOD/poly(ViBuIm+Br−)-G/GC electrode displayed an excellent sensitivity, together with a wide linear range and excellent stability for the detection of glucose. Accordingly, these unique properties of such novel nanocomposite generate a promising platform for the construction of mediator-free enzymatic biosensors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09565663
- Volume :
- 26
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Biosensors & Bioelectronics
- Publication Type :
- Academic Journal
- Accession number :
- 57163443
- Full Text :
- https://doi.org/10.1016/j.bios.2010.11.024