Pressure-stamped stretchable electronics using a nanofibre membrane containing semi-embedded liquid metal particles
Sijie Zheng1, Xiaowei Wang1, Weizheng Li1, Ziyang Liu1, Qingning Li1, Feng Yan1,2(严锋)*
1Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Negative Carbon Technologies College of Chemistry, Suzhou Key Laboratory of Soft Material and New Energy, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China.
2State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China.
Nat. Electron. 2024, 7, 576-585
Abstract: Stretchable electronic devices are of use in the development of bioelectronics, wearable devices and healthcare monitoring. Liquid-metal-based stretchable devices are of particular interest for such systems but typically require complex manufacturing processes and sufer from poor interfacial adhesion between the liquid metal and polymeric substrates. Here we show that a membrane of electrospun polymer fbres containing semi-embedded liquid metal particles can be used to make stretchable electronics. The liquid metal particles within the fbre network rupture under pressure and fll the gaps in the fbre mesh to form conductive regions. This enables the creation of circuits with high resolution (minimum linewidths of 50 µm) and stability (over 30,000 cycles of 100% strain) using circuit-patterned stamps. The circuits can be integrated with various electronic components to achieve diferent functions, including square wave signal output, light emission and wireless charging. We used this approach to create sensors for bioelectrical signal monitoring, thus illustrating the biocompatibility and permeability of the membranes. We also show that the liquid-metal-containing fbre membranes can be separated into their individual components and recycled.
链接：//www.nature.com/articles/s41928-024-01194-0
