Wires with Continuous Sabal Leaf‐Patterned Micropores Constructed by Freeze Printing for a Wearable Sensor Responsible to Multiple Deformations
Yu Xie, Junfeng Zou, Gang Li, Hongtao Liu, Ye Wang, Yifeng Lei, Kang Liu, Longjian Xue, Sheng Liu
Abstract
The design of porous structure in wearable sensors is very important for the detection of mechanical signals. However, it remains challenging to construct a porous structure capable of detecting all kinds of mechanical signals. Here, round wire with long-range orientated micropores (RW-LOM) is fabricated by a newly established freeze printing technique and constructed into a wearable sensor by the incorporation of carbon nanotubes and polydimethylsiloxane. The Sabal leaf-like lamellar structure in RW-LOM is realized and can be tuned by the proper coordination of slurry concentration and the printing parameters. The fine structures in RW-LOM allow the wearable sensor to detect compression, stretching, twisting, and bending with a high sensitivity, stability, and broad detecting range. This work not only provides a wearable sensor with high stability and high sensitivity but also establishes a technique to construct porous wires that could find applications in the fields like intelligent industry and healthcare.