Hybrid Architectures of Heterogeneous Carbon Nanotube Composite Microstructures Enable Multiaxial Strain Perception with High Sensitivity and Ultrabroad Sensing Range

A high ‐performance flexible electronic skin is generated by incorporating a piezoresistive carbon nanotube composite into a hierarchical topography of micropillar —wrinkle hybrid architectures. Owing to the unique hierarchical topography of the hybrid architectures, the hybrid electronic skin exhibits versatile and superior sensing performance, which includes multiaxial force detection, remarkable sensitivity, ultrabroad sensing range, sensing tunability, f ast response time, and high durability. AbstractLow ‐dimensional nanomaterials are widely adopted as active sensing elements for electronic skins. When the nanomaterials are integrated with microscale architectures, the performance of the electronic skin is significantly altered. Here, it is shown that a high‐performance flexible and stretchable electronic skin can be produced by incorporating a piezoresistive carbon nanotube composite into a hierarchical topography of micropillar–wrinkle hybrid architectures that mimic wrinkles and folds in human skin. Owing to the unique hierarchical topography of the hybrid architectures, the hybrid el ectronic skin exhibits versatile and superior sensing performance, which includes multiaxial force detection (normal, bending, and tensile stresses), remarkable sensitivity (20.9 kPa−1, 17.7 mm−1, and gauge factor of 707 each for normal, bending, and tensile stresses), ultrabroad sensing range (normal stress = 0 –270 kPa, bending radius of curvature = 1–6.5 mm, and tens...

Source: Small - November 11, 2018 Category: Nanotechnology Authors: Kahyun Sun, Hangil Ko, Hyun ‐Ha Park, Minho Seong, Sang‐Hyeon Lee, Hoon Yi, Hyung Wook Park, Tae‐il Kim, Changhyun Pang, Hoon Eui Jeong Tags: Full Paper Source Type: research