Indirect and Selective Patterning Strategy of Silver Nanowires Using Elastomer Poly(vinylidene Fluoride‐Co‐Hexafluoropropylene) for Stretchable Electronics

Silver nanowires (AgNWs) are excellent materials for stretchable electronics due to high conductivity and mechanical flexibility. However, achieving mechanical/environmental stability and reliable patterning for practical applications remains challenging. AgNW patterning based on direct patterning approaches, including conventional and solution‐based processes, has difficulty simultaneously satisfying pattern resolution, structural stability, and process efficiency. Here, a strategy is proposed to overcome these limitations by indirectly and selectively patterning AgNWs using functional elastomer patterns. Selective AgNW patterning is achieved using the difference in interfacial adhesion of AgNWs to elastomer poly(vinylidene fluoride‐co‐hexafluoropropylene) (e‐PVDF‐HFP) and polydimethylsiloxane (PDMS). This interfacial contrast enables embedding AgNWs into the e‐PVDF‐HFP layer, resulting in structurally stabilized electrodes with a wide range of patterning resolutions. The selectively patterned AgNW electrodes exhibit excellent mechanical and environmental stability attributed to partial penetration of AgNWs into the e‐PVDF‐HFP layer and encapsulation by PDMS. Based on this approach, the stretchable heater demonstrated clear Joule‐heating behavior under low‐voltage operation. Additionally, the stretchable capacitive pressure sensor was fabricated with a wide pressure range (>400 kPa) and excellent stability under pressure loading‐unloading cycles (>2000 cycles). Our approach suggests a direction to address limitations in the processability and reliability of AgNW‐based stretchable electrodes through structural design and process strategy.