Original Paper

Microchimica Acta

, Volume 179, Issue 1, pp 157-161

Non-enzymatic analysis of glucose on printed films based on multi-walled carbon nanotubes

  • Nikos G. TsierkezosAffiliated withInstitut für Chemie und Biotechnik, Technische Universität Ilmenau Email author 
  • , Uwe RitterAffiliated withInstitut für Chemie und Biotechnik, Technische Universität Ilmenau
  • , Nora WetzoldAffiliated withInstitut für Print- und Medientechnik, Fakultät für Maschinenbau, Technische Universität Chemnitz
  • , Arved Carl HüblerAffiliated withInstitut für Print- und Medientechnik, Fakultät für Maschinenbau, Technische Universität Chemnitz

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Abstract

We report on the fabrication of an enzyme–free electrochemical sensor for glucose based on a printed film consisting of multi–walled carbon nanotubes (MWCNTs). The MWCNT–based film can be produced by means of a flexographic printing process on a polycarbonate (PC) substrate. The electrochemical response of the MWCNT–based film (referred to as MWCNT–PC) towards the oxidation of glucose at pH 7 was studied by means of cyclic voltammetry and electrochemical impedance spectroscopy. The MWCNT–PC film exhibits substantial electrocatalytic activity towards the oxidation of glucose at an anodic potential of 0.30 V (vs. Ag/AgCl). The findings reveal that the MWCNT–PC film enables non–enzymatic sensing of glucose with a detection limit as low as 2.16 μM and a sensitivity of 1045 μA∙mM−1∙cm−2.

http://static-content.springer.com/image/art%3A10.1007%2Fs00604-012-0881-7/MediaObjects/604_2012_881_Figa_HTML.gif
Figure

Enzyme–free electrochemical sensor for glucose consisting of multi–walled carbon nanotubes was fabricated by means of flexographic printing process on polycarbonate substrate. The sensor exhibits electrocatalytic activity for glucose oxidation at an anodic potential of 0.30 V (vs. Ag/AgCl) with detection limit of 2.16 μM and sensitivity of 1045 μA∙mM−1∙cm−2.

Keywords

Enzyme-free sensor Glucose Multi-walled carbon nanotubes Flexographic printing process Polycarbonate substrate