Issue 6, 2012
From the journal:

Journal of Materials Chemistry

Water dispersible 1-one-butyric acid-functionalised multi-walled carbon nanotubes for enzyme immobilisation and glucose sensing

Mu-Yi Hua,*ab   Yu-Chen Lin,ab   Rung-Ywan Tsaic  and  Hsiao-Chien Chenab  

* Corresponding authors

a Green Technology Research Center, Department of Chemical and Materials Engineering, Chang Gung University, Tao-Yuan, Taiwan, R.O.C.
E-mail: huamy@mail.cgu.edu.tw
Fax: +886-3-2118668
Tel: +886-3-2118800

b Biosensor Group, Biomedical Engineering Research Center, Chang Gung University, Tao-Yuan, Taiwan, R.O.C

c Electronics and Optoelectronics Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan, R.O.C

Abstract

A new approach to synthesising 1-one-butyric acid-functionalised multi-walled carbon nanotubes (MWCNTs-BA) is presented involving the surface modification of multi-walled carbon nanotubes (MWCNTs) via a Friedel–Crafts chemical oxidative reaction using succinic anhydride in aluminium chloride. The MWCNTs-BA disperse homogeneously in water and exhibit very good solubility. Fourier transform infrared, Raman and X-ray photoelectron spectra indicated that the 1-one-butyric acid (BA) groups had formed on the sidewalls of the MWCNTs. The percentage of BA groups in the MWCNTs-BA was 7.80 mol% as determined using a simple acid–base titration method. The electrical conductivity, morphology and structure of the MWCNTs-BA were characterised with a four-point probe, field-emission scanning electron microscopy, transmission electron microscopy and X-ray diffraction. Furthermore, the sensor created by the immobilisation of glucose oxidase (GOD) onto the surface of MWCNTs-BA was sensitive toward glucose over a linear range from 10 μM to 2.5 mM with a correlation coefficient of 0.999 (n = 5), and it showed good sensitivity (23.5 μA mM−1 cm−2), enzyme affinity, reproducibility and storage stability. This immobile MWCNTs-BA matrix acts as an electron bridge between the enzyme molecules and the electrode, and it has the potential to allow the construction of useful sensors through enzyme immobilisation.

Graphical abstract: Water dispersible 1-one-butyric acid-functionalised multi-walled carbon nanotubes for enzyme immobilisation and glucose sensing

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Article information

DOI
https://doi.org/10.1039/C2JM15200B
Article type
Paper
Submitted
13 Oct 2011
Accepted
29 Nov 2011
First published
21 Dec 2011

J. Mater. Chem., 2012,22, 2566-2574

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Water dispersible 1-one-butyric acid-functionalised multi-walled carbon nanotubes for enzyme immobilisation and glucose sensing

M. Hua, Y. Lin, R. Tsai and H. Chen, J. Mater. Chem., 2012, 22, 2566 DOI: 10.1039/C2JM15200B

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