Application of nitrogen-doped multi-walled carbon nanotubes decorated with gold nanoparticles in biosensing

Novel films consisting of nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs) were fabricated by means of chemical vapor deposition technique and decorated with gold nanoparticles (AuNPs) possessing diameter of 14.0 nm. Electron optical microscopy analysis reveals that decoration of N-MWCNTs wit...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2023-10, Vol.27 (10), p.2645-2658
Main Authors: Tsierkezos, Nikos G., Freiberger, Emma, Ritter, Uwe, Krischok, Stefan, Ullmann, Fabian, Köhler, J. Michael
Format: Article
Language:English
Subjects:
Analytical Chemistry
Ascorbic acid
Bamboo
Carbon
Characterization and Evaluation of Materials
Chemical vapor deposition
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Decoration
Dopamine
Electrochemistry
Energy Storage
Glassy carbon
Gold
Multi wall carbon nanotubes
Nanoparticles
Nitrogen
Optical microscopy
Original Paper
Oxidation
Physical Chemistry
Quinones
Square waves
Uric acid
Voltammetry
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Summary:Novel films consisting of nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs) were fabricated by means of chemical vapor deposition technique and decorated with gold nanoparticles (AuNPs) possessing diameter of 14.0 nm. Electron optical microscopy analysis reveals that decoration of N-MWCNTs with AuNPs does not have any influence on their bamboo-shaped configuration. The electrochemical response of fabricated composite films, further denoted as N-MWCNTs/AuNPs, towards oxidation of dopamine (DA) to dopamine-o-quinone (DAQ) in the presence of ascorbic acid (AA) and uric acid (UA) was probed in real pig serum by means of cyclic voltammetry (CV) and square wave voltammetry (SWV). The findings demonstrate that N-MWCNTs/AuNPs exhibit slightly greater electrochemical response and sensitivity towards DA/DAQ compared to unmodified N-MWCNTs. It is, consequently, obvious that AuNPs improve significantly the electrochemical response and detection ability of N-MWCNTs. The electrochemical response of N-MWCNTs/AuNPs towards DA/DAQ seems to be significantly greater compared to that of conventional electrodes, such as platinum and glassy carbon. The findings reveal that N-MWCNTs/AuNPs could serve as powerful analytical sensor enabling analysis of DA in real serum samples.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-023-05562-2