条状物
材料科学
数码产品
可穿戴技术
可伸缩电子设备
可穿戴计算机
柔性电子器件
硅
扭转(腹足类)
光电子学
弯曲
纳米技术
复合材料
计算机科学
电气工程
工程类
外科
嵌入式系统
医学
作者
Yihao Shi,Zhao Jian-zhong,Bingchang Zhang,Jiahao Qin,Xinyue Hu,Yuan Cheng,Jia Yu,Jiansheng Jie,Xiaohong Zhang
标识
DOI:10.1002/adma.202313603
摘要
Well-functionalized electronic materials, such as silicon, in a stretchable format are desirable for high-performance wearable electronics. However, obtaining Si materials that meet the required stretchability of over 100% for wearable applications remains a significant challenge. Herein, a rational design strategy is proposed to achieve freestanding serpentine Si strips (FS-Si strips) with ultrahigh stretchability, fulfilling wearable requirements. The self-supporting feature makes the strips get rid of excessive constraints from substrates and enables them to deform with the minimum strain energy. Micrometer-scale thicknesses enhance robustness, and large diameter-to-width ratios effectively reduce strain concentration. Consequently, the FS-Si strips with the optimum design could withstand 300% stretch, bending, and torsion without fracturing, even under rough manual operation. They also exhibit excellent stability and durability over 50,000 cycles of 100% stretching cycles. For wearable applications, the FS-Si strips can maintain conformal contact with the skin and have a maximum stretchability of 120%. Moreover, they are electrically insensitive to large deformations, which ensure signal stability during their daily use. Combined with mature processing techniques and the excellent semiconductor properties of Si, FS-Si strips are promising core stretchable electronic materials for wearable electronics.
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