Stretchable Biaxial and Shear Strain Sensors Using Diffractive Structural Colors
Stretchable Biaxial and Shear Strain Sensors Using Diffractive Structural Colors
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DOI：
10.1021/acsnano.9b08953
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发表时间：
2020-05-26
期刊：
影响因子：
17.1
通讯作者：
Ahn, Sung-Hoon
中科院分区：
文献类型：
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作者：
Quan, Ying-Jun;Kim, Young-Gyun;Ahn, Sung-Hoon
可以使用等离子体纳米结构或光子晶体动态改变的结构颜色是可拉伸传感器的快速新兴研究领域。尽管各种技术的广泛应用，以实现应变响应的结构色，应变传感器的可行性的重要因素，如其传感机制，稳定性和再现性尚未被探索。在这里，我们介绍了一种可拉伸的，衍射的，基于颜色的无线应变传感器，可以使用整个可见光谱测量应变，基于弹性体基底表面上的锥形纳米结构阵列。通过拉伸或压缩衬底，可以根据变化的光栅间距来调谐衍射颜色。使用所提出的方法，我们设计了三种类型的应变传感模式：大变形（最大100%）拉伸应变，双轴二维应变，和剪切应变（最大78%）。制作了应变传感器，并对应变传感的适用性进行了评价。
Structural colors that can be changed dynamically, using either plasmonic nanostructures or photonic crystals, are rapidly emerging research areas for stretchable sensors. Despite the wide applications of various techniques to achieve strain-responsive structural colors, important factors in the feasibility of strain sensors-such as their sensing mechanism, stability, and reproducibility-have not yet been explored. Here, we introduce a stretchable, diffractive, color-based wireless strain sensor that can measure strain using the entire visible spectrum, based on an array of cone-shaped nanostructures on the surface of an elastomeric substrate. By stretching or compressing the substrate, the diffractive color can be tuned according to the changing grating pitch. Using the proposed method, we designed three types of strain-sensing modes: large-deformation (maximum 100%) tensile strain, biaxial 2D strain, and shear strain (maximum 78%). The strain sensors were fabricated, and applicability to strain-sensing was evaluated.