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Carbon Nanostructure Based Platform for Enzymatic Glutamate Biosensors Noora Isoaho, Emilia Peltola, Sami Sainio, Niklas Wester, Vera Protopopova, Benjamin Paul Wilson, Jari Koskinen, and Tomi Laurila J. Phys. Chem. C, Just Accepted Manuscript • DOI: 10.1021/acs.jpcc.6b10612 • Publication Date (Web): 08 Feb 2017 Downloaded from http://pubs.acs.org on February 10, 2017
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The Journal of Physical Chemistry
Carbon Nanostructure Based Platform for Enzymatic Glutamate Biosensors
Noora Isoaho,a Emilia Peltola,a Sami Sainio,a Niklas Wester,bVera Protopopova,b† Benjamin P. Wilson,c Jari Koskinen,b Tomi Laurilaa* a
Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto
University, PO Box 13500, 00076 Aalto, Finland b
Department of Materials Science and Engineering, School of Chemical Technology, Aalto University,
PO Box 16200, 00076 Aalto, Finland c
Department of Chemical and Metallurgical Engineering, School of Chemical Technology, Aalto
University, PO Box 16200, 00076 Aalto, Finland † Present address: Microsoft Oy, 02150 Espoo, Finland * Corresponding author:
[email protected] 1 ACS Paragon Plus Environment
The Journal of Physical Chemistry
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ABSTRACT: Hydrogen peroxide (H2O2) is an important molecule produced in various enzymatic reactions. It is especially important in electrochemical, enzymatic biosensors detecting electroinactive analytes, such as glucose, cholesterol, and glutamate. Thus, there is strong need for materials that have high affinity for H2O2 oxidation or reduction as well as enable immobilization and sustain enzyme activity without any additional polymer layers. Carbon nanofibers (CNF) directly grown on tetrahedral amorphous carbon (ta-C) are feasible candidates for this purpose as they possess reasonable wide water window (1.8 V), good activity for H2O2 reduction in physiological pH and contain innately large amounts of suitable functional groups for enzyme immobilization. Here we show their use in ultra-fast (
