A new sensor for light, heat and touch

Phys.org  May 14, 2019
Voltage arises in pyroelectric materials when they are heated or cooled. It is the change in temperature that gives a signal, which is rapid and strong, but it decays almost as rapidly. In thermoelectric materials, in contrast, a voltage arises when the material has one cold and one hot side. The signal here arises slowly, and some time must pass before it can be measured. Researchers in Sweden combined a pyroelectric polymer with a thermoelectric gel developed by them in a previous project. The combination gives a rapid and strong signal that lasts as long as the stimulus is present. The two materials interact in a way that reinforces the signal. The sensor will be suitable for use with electronic skin. It can measure changes in body temperature and react to both sunlight and warm touch…read more. TECHNICAL ARTICLE

The sensor that can measure changes in body temperature and react to both sunlight and warm touch. Credit: Thor Balkhed

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