Search

Recently, flexible wearable electrical sensors that can be comfortably attached to human body and soft robotics have attracted a widely attention. This work present a flexible fully printed temperature sensor based on the polyvinyl chloride/carbon black (PVC/CB) composite films fabricated on polyethylene terephthalate (PET) substrate by screen-printing method. The PVC/CB temperature-sensitive functional printing paste was prepared. The flexible fully printed temperature sensor shows high temperature sensitivity, excellent linearity of the temperature dependent resistance (correlation coefficient R2 equal to 0.9996) and good thermal cycling repeatability. In addition, we showed that the flexible fully printed temperature sensor can detect the breathing state of volunteer applying for a respiratory monitoring device. The developed flexible printed temperature sensors will have a great potential applications in environmental monitoring, wearable electronic, flexible healthcare devices.

Lead zirconate titanate thin films were successfully prepared on 5-inch TiOx/Pt/ Ti/SiO2/Si substrates by RF-Magnetron Sputtering method using a 0.8Pb(Zr0.3 Ti0.7)O3 + 0.2PbO ceramic target. The experimental results show that the orientation of PZT thin films can be change from (111) to (100) by precisely controlling the substrate temperature. The (111)-oriented films with the thickness of 500 nm thick, have the remanent polarization of 20 μC/cm2, dielectric constant of 370, dielectric loss of 1.5%, and coercive field of 130 KV/cm. By using dynamic measurement, the pyroelectric coefficient of the order of 10−8C/cm2 K was determined. Thermal-electric conversion studies indicate significant potential for uncooled infrared focal plane detector arrays.