Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
Reality Device Research Division, ICT Materials & Components & Research Laboratory, Electronics & Telecommunications Research Institute (ETRI), Daejeon, 34129, Republic of Korea.
Nat Commun. 2020 Jan 31;11(1):663. doi: 10.1038/s41467-020-14485-9.
The ability to image pressure distribution over complex three-dimensional surfaces would significantly augment the potential applications of electronic skin. However, existing methods show poor spatial and temporal fidelity due to their limited pixel density, low sensitivity, or low conformability. Here, we report an ultraflexible and transparent electroluminescent skin that autonomously displays super-resolution images of pressure distribution in real time. The device comprises a transparent pressure-sensing film with a solution-processable cellulose/nanowire nanohybrid network featuring ultrahigh sensor sensitivity (>5000 kPa) and a fast response time (<1 ms), and a quantum dot-based electroluminescent film. The two ultrathin films conform to each contact object and transduce spatial pressure into conductivity distribution in a continuous domain, resulting in super-resolution (>1000 dpi) pressure imaging without the need for pixel structures. Our approach provides a new framework for visualizing accurate stimulus distribution with potential applications in skin prosthesis, robotics, and advanced human-machine interfaces.
能够对复杂三维表面的压力分布进行成像，将极大地增加电子皮肤的潜在应用。然而，由于其有限的像素密度、低灵敏度或低顺应性，现有的方法在空间和时间上的保真度都较差。在这里，我们报告了一种超灵活和透明的电致发光皮肤，它能够自主实时显示超分辨率的压力分布图像。该设备包括一个透明的压力感应膜，其具有超高传感器灵敏度 (>5000kPa)和快速响应时间(<1ms)的可溶液处理纤维素/纳米线纳米杂化网络，以及一个基于量子点的电致发光膜。这两个超薄薄膜贴合每个接触物体，并将空间压力转化为连续域中的电导率分布，从而实现无需像素结构的超分辨率 (>1000dpi)压力成像。我们的方法为可视化精确刺激分布提供了一个新的框架，有望在皮肤假体、机器人和先进的人机界面中得到应用。
