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.
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Acknowledgments
The help of A. Sorrentino (CNR Portici), L. Vertuccio and L. Guadagno (Salerno University) and N. Martusciello (CNR-SPIN Salerno) for material and contact preparation is greatfully acknowledged.
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Neitzert, H., Landi, G. (2015). Influence of the Contact Metallization on the Characteristics of Resistive Temperature Sensors Based on EPOXY/MWCNT Composites. In: Compagnone, D., Baldini, F., Di Natale, C., Betta, G., Siciliano, P. (eds) Sensors. Lecture Notes in Electrical Engineering, vol 319. Springer, Cham. https://doi.org/10.1007/978-3-319-09617-9_58
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DOI: https://doi.org/10.1007/978-3-319-09617-9_58
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