The influence of different contact metallization materials and geometries on stability, sensitivity and linearity of epoxy/carbon nanotube based temperature sensors has been investigated. In our experiments, we found a perfect linear current-voltage characteristic and a stable conductance-temperature characteristics in the case of the sensor structures with the evaporated niobium contacts and a non-linear and noisy current-voltage characteristic with hysteresis in the case of the copper wire contacts. After a burn-in procedure, however, we could partially stabilize the electrical characteristics of the copper-wire contact based devices. However, in the latter case, even if a higher sensor sensitivity has been measured, the temperature sensing characteristics remained rather noisy a and an acceptable long-term stability could not be achieved.

Influence of the Contact Metallization on the Characteristics of Resistive Temperature Sensors Based on EPOXY/MWCNT Composites

NEITZERT, Heinrich Christoph;LANDI, GIOVANNI
2015

Abstract

The influence of different contact metallization materials and geometries on stability, sensitivity and linearity of epoxy/carbon nanotube based temperature sensors has been investigated. In our experiments, we found a perfect linear current-voltage characteristic and a stable conductance-temperature characteristics in the case of the sensor structures with the evaporated niobium contacts and a non-linear and noisy current-voltage characteristic with hysteresis in the case of the copper wire contacts. After a burn-in procedure, however, we could partially stabilize the electrical characteristics of the copper-wire contact based devices. However, in the latter case, even if a higher sensor sensitivity has been measured, the temperature sensing characteristics remained rather noisy a and an acceptable long-term stability could not be achieved.
978-3-319-09616-2
978-3-319-09617-9
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4684200
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