Flexible, wearable electronics are making their way into everyday use, and their full potential is still to be realized. Soon, this technology could be used for precision medical sensors attached to the skin, designed to perform health monitoring and disease detection. It would be like having a high-tech medical center at your service. Worn routinely, future wearable electronics could potentially detect possible emerging health problems-such as heart disease, cancer-even before obvious signs appear. The device could also do a personalized analysis of the tracked health data while minimizing the need for its wireless transmission(传输).
Such a skin-like device is being developed in a project. Leading the project is Sihong Wang, assistant professor at the University of Chicago. This device would need to collect and process a vast amount of data, well above what even the best smartwatches can do today, and it would have to deal with this data speedily with very low power consumption in a very tiny space. To address that need, the team called upon neuromorphic computing(神经形态计算). This AI technology copies operation of the brain by training on past data sets and learning from experience. Its advantages also include compatibility(兼容性) with stretchable material, lower energy consumption and faster speed than other types of AI.
The other major challenge the team faced was integrating the electronics into a skin-like stretchable material. The key material in any electronic device is a semiconductor. In current rigid electronics used in cell phones and computers, this is normally a solid silicon chip.
Stretchable electronics require that the semiconductor be a highly flexible material that is still able to conduct electricity. The team's skin-like neuromorphic chip consists of a thin film of a plastic semiconductor combined with stretchable gold nanowire electrodes. Even when stretched to twice its normal size, their device functioned as planned without formation of any breaks.
"While still requiring further development on several fronts, our device could one day be a game changer in which everyone can get their health status in a much more effective and frequent way, " said Wang.
