Please use this identifier to cite or link to this item:
|Title:||Biosensing properties of diamond and carbon nanotubes|
De Zhang, W.
|Citation:||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.|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 19, 2019
WEB OF SCIENCETM
checked on Mar 4, 2019
checked on Mar 16, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.