Influence of morphology and topography on potentiometric response of magnesium and calcium sensitive PEDOT films doped with adenosine triphosphate (ATP)

B Paczosa-Bator, Jouko Peltonen, Johan Bobacka, Andrzej Lewenstam

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

Abstract

Poly(3,4-ethylenedioxythiophene) (PEDOT) films doped with adenosine triphosphate (ATP) are used to study the biologically relevant competitive magnesium and calcium ion-exchange at ATP membrane sites. It is shown, by atomic force microscopy (AFM) and scanning electron microscopy (SEM), that the surface topography and morphology of the PEDOT-ATP films determines the quality of their potentiometric response. More smooth and less rough films result in better potentiometric characteristics, particularly in a faster response. The topography/morphology of the PEDOT-ATP films is influenced by conditions during electrodeposition (electrochemical method of deposition, pH, concentration of electrolytes) and post-deposition soaking (including net-time of soaking), as evidenced by X-ray photoelectron spectroscopy (XPS) and energy dispersive analysis of X-rays (EDAX). (c) 2005 Elsevier B.V. All rights reserved.
Original languageUndefined/Unknown
Pages (from-to)118–127
Number of pages10
JournalAnalytica Chimica Acta
Volume555
Issue number1
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • membrane calcium and magnesium
  • ATP (adenosine triphosphate)
  • PEDOT (poly(3,4-ethylenedioxythiophene))
  • roughness analysis
  • Membrane potential

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