One‐Dimensional van der Waals Materials for Next‐Generation Flexible Electronics

ABSTRACT Flexible electronics is entering a critical phase of transition from proof of concept to system integration and practical applications. A key challenge is achieving both excellent electrical properties and mechanical flexibility in a single material system. One‐dimensional (1D) van der Waals materials possess both the high aspect ratio of conventional 1D nanostructures and the excellent electrical and optical properties brought by the atomic and dimensional reduction of two‐dimensional vdW materials. Their chain‐like structure enables spatial separation of conductive pathways and load‐bearing components, providing high flexibility, 1D carrier transport, and strong anisotropy. These features make them promising for flexible transistors, optoelectronic devices, and strain sensors. This review begins by highlighting the structural advantages of 1D van der Waals materials and then explores their key performance properties and advances in system applications. In addition, it identifies wafer‐scale directed growth, interface engineering, and scalable integration as core challenges toward the realization of systematic integration of these materials in flexible electronic systems. The aim of this review is to elucidate the intrinsic relationship between the structural benefits of 1D van der Waals materials and their device functionality, providing a systematic reference for future material design and device development in next‐generation flexible electronics.