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Influence of morphology and topography on potentiometric response of magnesium and calcium sensitive PEDOT films doped with adenosine triphosphate (ATP) |
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| Authors: | B Paczosa-Bator J Bobacka |
| Institution: | a Faculty of Material Science and Ceramics, AGH University of Science and Technology, PL-30059 Cracow, Poland b Department of Physical Chemistry, Åbo Akademi University, FIN-20500 Turku, Finland c Centre for Process Analytical Chemistry and Sensor Technology ‘ProSens’, Faculty of Chemical Engineering, Biskopsgatan 8/Axelia, Process Chemistry Centre, Åbo Akademi University, FIN-20500 Åbo-Turku, Finland |
| 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). |
| Keywords: | Membrane potential Membrane calcium and magnesium ATP (adenosine triphosphate) Conducting polymer PEDOT (poly(3 4-ethylenedioxythiophene)) Roughness analysis |
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