高灵敏度和高线性度的可拉伸应变传感器的分层结构设计

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中文摘要：对柔性电子设备日益增长的需求使得开发具有高灵敏度和高线性度的传感器更加迫切.由于拉伸应变下不可逆结构损伤诱导电阻线性急剧增加,现有的可拉伸应变传感器难以完美地同时实现这两个特性.针对这一问题,本文提出了一种兼具表面褶皱和体相梯度孔隙的新型分级互连结构,利用水热活化机制精确控制纳米级褶皱间距,通过调控相分离中热力学和动力学行为构筑出体相梯度多孔结构,通过改变器件两侧曲率实现各向异性特征,深入研究各种设计的功效、量化几何结构对灵敏度的有效贡献和追踪形态演变.基于器件显著的灵敏度和各向异性,所制备的传感器能够有效监测静态和动态位移、表面运动、二维应变信号变化以及预测液位随时间变化.本工作为实现高质量的感知能力提供了一种广泛适用、适应性强、可扩展且具有成本效益的方法.

外文标题：Hierarchical structural design towards stretchable strain sensors with ultra-high sensitivity and linearity

外文摘要：The increasing demands for flexible electronic devices have necessitated the development of sensors that possess remarkable sensitivity and linearity.However,con-ventional strain sensors encounter difficulties in simulta-neously achieving above two desired characteristics,because a linear steep increase in resistance is difficult to realize due to the irreversible structural damage under tensile strain.Herein,a novel hierarchical interconnected structure with the external surface wrinkles and internal gradient pores was proposed to achieve extraordinary levels of sensitivity and high linearity in stretchable strain sensors.The nanoscale wrinkle spacing can be precisely controlled by hydrothermal activation mechan-ism.The bulk gradient porous structure was constructed through the manipulation of thermodynamic and kinetic be-haviors of phase separation.Additionally,macroscopic cur-vatures on both sides of sensors were manipulated to achieve the anisotropy.The efficacy of various designs,quantized ef-fective contributions of geometric configurations on the sen-sitivity and morphology evolution were discussed in depth.Due to the extraordinary sensitivity and anisotropy,our sen-sors have the capability to efficiently monitor alterations in both static and dynamic displacement,surface movement and two-dimensional strain signals,as well as predict variations in liquid level over time.Our approach provides a widely ap-plicable,adaptable,scalable,and cost-effective method for achieving high-quality sensing capabilities.

外文关键词：

stretchable electronicsstretchable strain sensorssurface wrinklessensitivitylinearity

作者：

武春锦、彭义豪、王少龙、邱炳人、李冠军、曹玉杰、赖文勇

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作者单位：

State Key Laboratory of Organic Electronics and Information Displays,Institute of Advanced Materials(IAM),School of Chemistry and Life Sciences,Nanjing University of Posts & Telecommunications,Nanjing 210023,China

School of Environmental Science,Nanjing Xiaozhuang University,Nanjing 211171,China

关键词：

stretchable electronics stretchable strain sensors surface wrinkles sensitivity linearity

基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNatural Science Research Start-Up Foundation of Recruiting Talents of Nanjing University of Posts and TelecommunicationsNatural science Foundation of Jiangsu ProvinceFoundation of Key Laboratory of Flexible Electronics of Zhejiang ProvinceProgram for Jiangsu Specially-Appointed ProfessorLeading Talent of Technological Innovation of National Ten-Thousands Talents Program of China

项目编号：

2023YFB360890421835003NY222103BE20191202023FE002RK030STP15001

出版年：

2024

DOI：

10.1007/s40843-024-2923-4

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(7)

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