Characterization of different DLC and DLN electrodes for biosensor design

Abstract : Diamond-Like Carbon and Carbon-Like Nanocomposite electrodes, novel materials in the field of biosensors, made with different ratio of sp3/sp2 carbon hybridization or doped with elements such as Ni, Si and W, were characterized electrochemically by cyclic voltammetry and by amperometric measurements towards hydrogen peroxide. SiCAr1 and SiCNi5% were chosen as sensitive transducers for elaboration of amperometric glucose biosensors. Immobilization of glucose oxidase was carried out by cross-linking with glutareldehyde. Measurements were made at a fixed potential + 1.0 V in 40 mM phosphate buffer pH 7.4. SiCAr1 seems to be more sensitive for glucose (0.6875 µA/mM) then SiCNi5% (0.3654 µA/mM). Detections limits were respectively 20 µM and 30 µM. Michaelis-Menten constants for the two electrodes were found around 3 mM. 48% and 79% of the original response for 0.5 mM glucose remained respectively for both electrodes after 10 days.
Complete list of metadatas

Cited literature [8 references]  Display  Hide  Download

https://hal-ujm.archives-ouvertes.fr/ujm-00109718
Contributor : Anne-Sophie Loir <>
Submitted on : Thursday, October 26, 2006 - 4:02:47 PM
Last modification on : Wednesday, November 13, 2019 - 11:50:04 AM
Long-term archiving on : Tuesday, April 6, 2010 - 8:58:02 PM

Identifiers

  • HAL Id : ujm-00109718, version 1

Citation

R. Maalouf, N. Jaffrezic-Renault, O. Vittori, M. Sigaud, Y. Saikali, et al.. Characterization of different DLC and DLN electrodes for biosensor design. Journal of Advanced Science, Society of Advanced Science, 2006, 18, 18, pp.31-36. ⟨ujm-00109718⟩

Share

Metrics

Record views

329

Files downloads

495