Science Daily July 1, 2022 Previously reported wearable sensors for smart human–machine interaction have limited sound-sensing quality as a consequence of a poor frequency response and a narrow acoustic-pressure range. Researchers in South Korea have developed a skin-attachable acoustic sensor that has higher sensing accuracy in wider auditory field than human ears, with flat frequency response (15–10 000 Hz) and a good range of linearity (29–134 dBSPL) as well as high conformality to flexible surfaces and human skin. They exploited the low residual stress and high processability of polymer materials in a diaphragm structure designed using acousto-mechano-electric modeling to achieve the […]
Tag Archives: Electronic skin
Multisensory hybrid material as smart electronic skin
Nanowerk May 16, 2022 Researchers in Austria proposed a simplified design with biocompatible materials for an efficient electronic skin. They demonstrated that it can deliver multi-stimuli sensitivity with high spatial resolution. While the piezoelectricity of ZnO provided sensitivity to external force, the thermoresponsiveness of the hydrogel core provided sensitivity to surrounding temperature and humidity changes. The hydrogel core exerted mechanical stress onto the ZnO shell, which was translated to a measurable piezoelectric signal. A localized force sensitivity was achieved with very low cross talk. They demonstrated the sensor’s sensitivity to humidity was above and below the hydrogel’s lower critical solution […]
New electronic skin can react to pain like human skin
EurekAlert September 1, 2020 An international team of researchers (Australia, Bangladesh) combined stretchable electronics, temperature-reactive coatings, and brain-mimicking memory to develop a device that can electronically replicate the way human skin senses pain. They have demonstrated the ability to detect and respond to pressure, temperature, and pain stimuli above a threshold with real‐life performance characteristics with explanation of underlying mechanisms. The research opens a way to better prosthetics, smarter robotics and non-invasive alternatives to skin grafts…read more. Open Access TECHNICAL ARTICLE
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 […]