Wearable Porous Au Smartsensors for On-Site Detection of Multiple Metal Ions.

Owing to advantages of miniaturization, convenient integration, flexibility, and real-time monitoring, wearable smartsensors have received numerous attention and greatly developed in various fields. However, there usually appears a contradiction between sensing behaviors and simple fabricated methods, seriously limiting on-site detection of actual samples. In this work, a porous Au-based smartsensor has been in situ prepared by combining screen printing technology and sacrificial template electrodeposition. Thanks to abundant active adsorption sites, multiple metal ions (Pb, Cu, and Hg) can be easily achieved on-site detection by this smart platform with a low limit of detection as well as high sensitivity, excellent selectivity, good stability, repeatability, and bending performance. Significantly, it also exhibits a reliable detective capability in actual liquid cosmetic samples with a portable cellphone, which identically corresponds to standard inductively coupled plasma-mass spectrometry (ICP--MS) evaluation. Therefore, this wearable smartsensor provides a promising platform for artificial intelligence application in future daily life.