Characterisation of the interdigitated electrode array with tantalum silicide electrodes separated by insulating barriers

Andrey Bratov, Natalia Abramova, Javier Ramón-Azcón, Angel Merlos, Francisco Sánchez-Baeza, Maria Pilar Marco, Carlos Domínguez

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

A novel design of an interdigitated electrode array impedimetric sensor is proposed with electrode digits separated by an insulating barrier. This configuration results in that the major part of the electric current between electrodes follows close to the surface of the barrier and not through the solution thus permitting to enhance the sensitivity to possible chemical reactions on its surface. As a model system the effect of electrostatically assembled polyelectrolyte layers deposited using layer-by-layer method on the sensor impedance was studied. The sensitivity of the devices depends on the barrier height and is considerably enhanced comparing to conventional flat sensor structures. Devices may be used as a transducer for direct label-free biosensor development.

Original languageEnglish
Pages (from-to)1621-1624
Number of pages4
JournalElectrochemistry Communications
Volume10
Issue number10
DOIs
Publication statusPublished - 2008 Oct
Externally publishedYes

Keywords

  • Biosensor
  • Impedance
  • Iterdigitated electrode array
  • Layer-by-layer
  • Sensor

ASJC Scopus subject areas

  • Electrochemistry

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