The voltammetric performance of interdigitated electrodes with different electron-transfer rate constants

Xiaoling Yang, Guigen Zhang

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


To explore ways to improve the performance of affinity-based biosensors, we simulated, with 2D and 3D finite element analyses, the cyclic voltammetric (CV) curves for interdigitated electrodes (IDEs) at various electron-transfer rate constants (i.e., the k0 value). The CV curves and the relationships between the limiting current and k0 were obtained and examined. From the 2D models, it is found that the limiting current of IDEs is very sensitive to the change of k0, especially at larger k0 values. As the electrode width (w) decreases, significant enhancements in the sensitivity and lower-detection-limit can be achieved due to the enhanced mass transport near the IDEs. From the 3D models, it is found the limiting current can be further improved by using 3D nanorod-modified IDEs. This study presents some important information for improving the design and development of future electrochemical-based biosensors.

Original languageEnglish
Pages (from-to)624-631
Number of pages8
JournalSensors and Actuators, B: Chemical
Issue number2
StatePublished - Oct 1 2007

Bibliographical note

Funding Information:
This work was supported by the National Science Foundation and the Institute of Faculty of Engineering at The University of Georgia.


  • Affinity-based biosensor
  • Cyclic voltammetry
  • Electron-transfer rate
  • Finite element analysis
  • Interdigitated electrodes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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