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Flexible and Stretchable Three-Dimensional (3D)
 Devices


 
 
 Developments of ways to fabricate complex three-dimensional (3D) structures
 enable the controlling of physical and chemical properties of the electrical
 systems. Especially, owing to the rapid developments of the fabrication
 processes (e.g., the 3D printing, origami, and mechanical buckling process),
 researchers have integrated multifunctional and sophisticated 3D structures with
 flexible and stretchable substrates for high electrical, mechanical, and optical
 performances. In this review, we highlight the latest research on flexible and
 stretchable electric systems integrated with 3D structures such as a
 super-sensitive pressure sensor, a high-performance wearable monitoring system,
 a multi-functional cell scaffold, a foldable thermoelectric generator, a
 wearable energy harvesting system, a hemispherical photodetector array, and a
 projection screen with the reversible state changes. In subsequent sections, we
 summarize the advanced research results and provide future strategies for
 flexible and stretchable 3D electronic devices.
