Pyroelectric temperature sensitization of multi-wall carbon nanotube papers

This study explores the possibility of converting a self-supporting, randomly aligned, low impedance multi-wall carbon nanotube (MWCNT) paper into a resistive temperature measurement unit working at ambient pressure in air in the 25-70 °C range. Thermosensitization was achieved by decorating the surface of the films with pyroelectric CsNO3 or LiNbO3 crystals. Assuming a linear temperature response, temperature coefficient of resistance values of −0.158% °C−1 and −0.246% °C−1 were calculated for CsNO3 and LiNbO3 doped films, respectively. The corresponding temperature measurement accuracies (2.2 °C and 3.0 °C) are acceptable for some applications but the precision of the temperature measurement needs to be improved.