Please use this identifier to cite or link to this item: https://doi.org/10.1021/la0490947
Title: Biosensing properties of diamond and carbon nanotubes
Authors: Poh, W.C.
Loh, K.P. 
De Zhang, W.
Triparthy, S.
Ye, J.-S. 
Sheu, F.-S. 
Issue Date: 22-Jun-2004
Source: Poh, W.C., Loh, K.P., De Zhang, W., Triparthy, S., Ye, J.-S., Sheu, F.-S. (2004-06-22). Biosensing properties of diamond and carbon nanotubes. Langmuir 20 (13) : 5484-5492. ScholarBank@NUS Repository. https://doi.org/10.1021/la0490947
Abstract: The biochemical properties of boron-doped diamond (BDD), carbon nanofiber, fullerene, and multiwalled carbon nanotube (MWCNT) electrodes have been investigated comparatively. Physiochemical factors which affect the biosensing properties such as surface hydrophobicities, effective surface area, and intrinsic material properties are studied. Voltammetric responses of the as-grown thin film electrode and surface-modified electrode to biomolecules such as L-ascorbic acid (L-AA), dopamine (DA), and uric acid are examined. As-grown MWCNT electrodes exhibit selective voltammetric responses to the different biomolecules and faster electron-transfer kinetics compared to BDD. The selective response is due to the considerably lower anodic potential of L-AA on MWCNT (-48 mV vs Ag AgCl compared to 575 mV on BDD). This electrocatalytic response can be replicated on a nonselective carbon nanofiber electrode by coating it with gold nanoparticles. BDD has no intrinsic selective response to L-AA, and surface modification by anodic polarization is necessary for resolving L-AA and DA.
Source Title: Langmuir
URI: http://scholarbank.nus.edu.sg/handle/10635/75672
ISSN: 07437463
DOI: 10.1021/la0490947
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

122
checked on Feb 19, 2018

WEB OF SCIENCETM
Citations

117
checked on Feb 19, 2018

Page view(s)

29
checked on Feb 18, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.