Photonic rubber sheets with tunable color by elastic deformation
Photonic rubber sheets with tunable color by elastic deformation
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DOI：
10.1021/la0521037
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发表时间：
2006-01-31
期刊：
影响因子：
3.9
通讯作者：
Sawada, T
中科院分区：
文献类型：
--
作者：
Fudouzi, H;Sawada, T
本文介绍了一种具有可逆调谐结构色的弹性硅胶片。该片材具有嵌入聚（二甲基硅氧烷）、PDMS、弹性体中的立方紧密堆积的ccp胶体颗粒的薄层。ccp（111）平面阵列根据布拉格定律衍射选择波长的光。这是PDMS片材的结构颜色的原因。由于片材在水平方向上被拉伸，因此其在垂直方向上的尺寸减小。其结果是，ccp（111）面的晶格距离变小，光的反射波长向短波长移动。例如，反射峰作为片材伸长率的函数从589 nm调谐到563 nm。当变形量在其延伸率的20%以内时，峰位随变形量线性下降。因此，PDMS片的颜色从红色变为绿色。当PDMS片材上的机械应变被释放时，峰返回到其原始位置，并且PDMS片材的颜色也变回红色。调节PDMS片材的颜色是可逆且可重复的过程。这种新型的PDMS薄片具有应用于机械应变传感的潜力。
This article describes an elastic silicone sheet with reversible tuning structural color. The sheet has a thin layer of cubic close-packed, ccp, colloidal particles embedded in poly(dimethylsiloxane), PDMS, elastomer. The array of ccp (111) planes diffracts light of selective wavelengths according to Bragg's law. This is responsible for the structural color of the PDMS sheet. Because the sheet was stretched in the horizontal direction, it was reduced in size in the vertical direction. As a result, the lattice distance of ccp (111) planes decreased, and the reflected wavelength of light shifted to shorter wavelengths. For example, the peak of reflection was tuned from 589 to 563 nm as a function of sheet elongation. The peak position decreased linearly with deformation when the deformation was within 20% of its elongation. Accordingly, the color of the PDMS sheet changed from red to green. When the mechanical strain on the PDMS sheet was released, the peak returned to its original position, and the color of the PDMS sheet also changed back to red. Tuning the color of the PDMS sheet is a reversible and repeatable process. The novel PDMS sheet has the potential to be applied to mechanical strain sensing.