期刊
CHEMICAL ENGINEERING JOURNAL
卷 437, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.135399
关键词
Surface wrinkling; Templating; Microcrack; Strain sensor; Flexible acoustic sensor; Voice recognition
资金
- National Natural Science Foundation of China (NSFC) [21875160, 12122204, 11872150, 11921002, 11972206, 11890673]
- Shanghai Shuguang Program [21SG05]
- Shanghai Rising-Star Program [19QA1400500]
- Young Scientist Project of MOE Innovation Platform [KF2219]
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Nanyang Technological University
- Agency for Science, Technology and Research (A*STAR)
This study proposes a new type of strain sensor based on an unexploited bilayer structure. The pre-wrinkled layer guides microcrack formation, leading to effective integration of sensitivity and stretchability. The obtained sensor exhibits high stretchability, unprecedented gauge factor, and fast response.
As a fundamental component for human-machine interaction and human health monitoring, stretchable strain sensors suffer from an irreconcilable trade-off between sensitivity and stretchability. This severely limits their capability to detect both subtle and large deformations simultaneously. Here, a new class of strain sensors is proposed based on a hitherto unexploited strain-sensing bilayer consisting of a pre-wrinkled reduced graphene oxide layer and a highly susceptible layer of conformally deposited Ag nanoparticles. During straining, the pre-wrinkled interlayer guides preferential microcracking at the wavy troughs of the conformal Ag surface-layer, leading to effective integration of the irreconcilable sensitivity and stretchability. The obtained strain sensor not only shows high stretchability, but also owns unprecedented gauge factor (GF) both in subtle and large strain ranges (0-2%, GF: 420; 110-125%, GF: 1.1 x 10(9)), ultralow strain detection limit (0.01%) and ultrafast response (0.13 ms). As demonstrated, the strain sensor has superior capabilities in diverse human motion detection and voice recognition over the whole audible frequency range (20-20000 Hz) with ultrahigh frequency resolution (0.5 Hz). It is expected that the novel wrinkle-directed dynamic patterning/structuring (e.g., microcracking in the current case) involved in the proposed bilayer design can be extended to fabricate a new generation of stretchable sensing devices with unprecedented capabilities.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据