The development of a low level humidity capacitive sensing device working at room temperature, based on a thick layer of iron oxide nanopowders dispersed into a poly(diallyldimethylammoniumchloride) (PDDAC) hydrophilic host matrix deposited on flexible commercial plastic substrates provided with silver electrodes, is reported. The sensor response was tested in a transduction system based on a capacity-frequency conversion of the timing circuit by means of a microcontroller unit. The sensor was investigated in the absolute humidity range from 0% to 1%, showing a good sensitivity and response linearity.
Polymer/Metal Oxides Composites on Flexible Commercial Substrates as Capacitive Sensors
DONATO, Nicola;LATINO, MARIANGELA;BONAVITA, ANNA;SPADARO, DONATELLA;NERI, Giovanni
2012-01-01
Abstract
The development of a low level humidity capacitive sensing device working at room temperature, based on a thick layer of iron oxide nanopowders dispersed into a poly(diallyldimethylammoniumchloride) (PDDAC) hydrophilic host matrix deposited on flexible commercial plastic substrates provided with silver electrodes, is reported. The sensor response was tested in a transduction system based on a capacity-frequency conversion of the timing circuit by means of a microcontroller unit. The sensor was investigated in the absolute humidity range from 0% to 1%, showing a good sensitivity and response linearity.File in questo prodotto:
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