Functionalized multi walled carbon nanotubes nano biocomposite film for the amperometric detection of L-cysteine

Soundappan Thiagarajan; Yogeswaran Umasankar; Shen-Ming Chen

doi:10.1166/jnn.2010.1810

Functionalized multi walled carbon nanotubes nano biocomposite film for the amperometric detection of L-cysteine

J Nanosci Nanotechnol. 2010 Feb;10(2):702-10. doi: 10.1166/jnn.2010.1810.

Authors

Soundappan Thiagarajan¹, Yogeswaran Umasankar, Shen-Ming Chen

Affiliation

¹ Electroanalysis and Bioelectrochemistry Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Taipei 106, Taiwan, Republic of China.

PMID: 20352707
DOI: 10.1166/jnn.2010.1810

Abstract

The development of nano biocomposite film (f-MWCNTs-Au-GO(x)) for L-cysteine (LC) detection is proposed by using glassy carbon electrode (GCE). The proposed nano biocomposite film has been fabricated on ITO for scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis. Next, the f-MWCNTs-Au-GO(x) nano biocomposite film modified GCE's surface was examined by scanning electrochemical microscopy (SECM). The proposed nano biocomposite film has been successfully applied for the detection of LC using cyclic voltammetry (CV) and amperometry. The f-MWCNTs-Au-GO(x) film modified GCE exhibited a linear response for LC detection in the lower and higher concentrations ranges of 2 to 42 x 10(-6), 0.1 to 1.08 x 10(-3) mol L(-1). Also, the proposed nano biocomposite film possesses high sensitivity and good repeatability for LC detection.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cysteine / analysis*
Electrochemistry / methods*
Electrodes
Microscopy, Atomic Force
Microscopy, Electron, Scanning
Nanotubes, Carbon*
Reproducibility of Results

Substances

Nanotubes, Carbon
Cysteine