Dimensional analysis to distinguish diffusion-limited and charge-transfer reaction-limited processes of fabricated impedimetric micro electrochemical sensors to detect hydrogn and ammonium ions

B. Gao, Y. Hua, C. Zhao, W. Xu, S. Ma, A. P. Zhang, M. Yuen, Y. K. Lee*

*Corresponding author for this work

Research output: Chapter in Book/Conference Proceeding/ReportConference Paper published in a bookpeer-review

Abstract

Dimensional analysis was applied to systematically study the diffusion-limited (DL) and chargetransfer reaction-limited (CRL) processes in Micro electrochemical sensors (MECSs). The electrochemical impedance spectroscopy (EIS) for MECS to detect hydrogen and ammonium ions was fitted with the equivalent circuit model (ECM). With the help of Buckingham Pi Theorem, two dimensionless parameters: normalized impedance and reaction-diffusion-frequency were identified to distinguish these two processes. The results showed that these two parameters can be applied not only in our fabricated MECSs for detecting hydrogen and ammonium ions, but also in other reported relevant works for detecting copper ions and DNA molecules.

Original languageEnglish
Title of host publication20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016
PublisherChemical and Biological Microsystems Society
Pages1254-1255
Number of pages2
ISBN (Electronic)9780979806490
Publication statusPublished - 2016
Event20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016 - Dublin, Ireland
Duration: 9 Oct 201613 Oct 2016

Publication series

Name20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016

Conference

Conference20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016
Country/TerritoryIreland
CityDublin
Period9/10/1613/10/16

Keywords

  • Charge-transfer reaction
  • Diffusion
  • EIS
  • Micro electrochemical sensor

Fingerprint

Dive into the research topics of 'Dimensional analysis to distinguish diffusion-limited and charge-transfer reaction-limited processes of fabricated impedimetric micro electrochemical sensors to detect hydrogn and ammonium ions'. Together they form a unique fingerprint.

Cite this