The electrical characteristics of oxidized poly(thionaphtheneindole) were investigated as a function of ambient relative humidity (r.h.). The current flowing through a pressed pellet of material between two massive gold electrodes plotted against voltage gives a wave-shaped curve with a halfwave potential at V <>=<>~3V. The current recorded at 4V (plateau of the wave) is a sigmoidal function of r.h. with the inflexion point at ~60%. An interpretation of these findings is given, based on the influence of water on the dielectric constant of the material and on acid–base equilibrium between poly(thionaphtheneindole) and water, from which protons are produced. The behaviour of poly (thionaphtheneindole) as the active component of an amperometric humidity sensor is also reported
Casalbore Miceli, G., Camaioni, N., Beggiato, G., Campos, M., Mari, C. (1997). Relationship between ambient humidity and the ionic conductivity of poly(thionaphtenindole): behaviour as an amperometric humidity sensor. JOURNAL OF APPLIED ELECTROCHEMISTRY, 27(4), 441-447 [10.1023/A:1018417821896].
Relationship between ambient humidity and the ionic conductivity of poly(thionaphtenindole): behaviour as an amperometric humidity sensor
MARI, CLAUDIO MARIA
1997
Abstract
The electrical characteristics of oxidized poly(thionaphtheneindole) were investigated as a function of ambient relative humidity (r.h.). The current flowing through a pressed pellet of material between two massive gold electrodes plotted against voltage gives a wave-shaped curve with a halfwave potential at V <>=<>~3V. The current recorded at 4V (plateau of the wave) is a sigmoidal function of r.h. with the inflexion point at ~60%. An interpretation of these findings is given, based on the influence of water on the dielectric constant of the material and on acid–base equilibrium between poly(thionaphtheneindole) and water, from which protons are produced. The behaviour of poly (thionaphtheneindole) as the active component of an amperometric humidity sensor is also reportedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.