Power-Free and Self-Cleaning Solar Light Detector Based on the Temperature-Sensitive Structural Color and Photothermal Effect,ACS Applied Materials & Interfaces

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Power-Free and Self-Cleaning Solar Light Detector Based on the Temperature-Sensitive Structural Color and Photothermal Effect
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-07-09 , DOI: 10.1021/acsami.1c09533
Meiyu Xiong ₁ , Yuhang Sheng ₁ , Yunsong Di ₁ , Fangjian Xing ₁ , Liyan Yu ₂ , Jinlei Zhang ₃ , Weiping Zhou ₄ , Cihui Liu ₁ , Lifeng Dong ₂ , Zhixing Gan _{1,

2}

Affiliation

In this work, photothermal materials are integrated with a temperature-sensitive hydrogel and structural color for visually detecting solar intensity. Inspired by the functional performance of beetles, the photothermal layer is constructed by depositing candle soot on a film of Cu nanoparticles, while the temperature-sensitive colored hydrogel is fabricated by self-assembling colloidal photonic crystals on poly(N-isopropylacrylamide) (PNiPAM). The deposition of candle soot not only improves the photothermal performance but also leads to a superhydrophobic surface with a self-cleaning function. The photothermal layer absorbs sunlight and converts it into heat, which is then transferred to the hydrogel. The structural color of the hydrogel changes due to the heat-induced volume shrinkage. As the solar intensity increases from 0.62 to 1.27 kW/m², the structural color conspicuously changes from red to orange, yellow, green, cyan, and blue, with reflection peaks shifting from 640 to 460 nm accordingly. The color change is highly apparent, which can be easily observed by the naked eye, suggesting that the solar intensity can be easily detected by reading out the structural color. This power-free and self-cleaning solar sensor can work for a long period without maintenance, which is suitable for a wide application prospect, such as smart home and agriculture.

中文翻译：

基于温度敏感结构颜色和光热效应的免电源自清洁太阳光探测器

在这项工作中，光热材料与温度敏感的水凝胶和结构色相结合，用于视觉检测太阳强度。受甲虫功能性能的启发，光热层是通过在 Cu 纳米颗粒薄膜上沉积烛烟构建的，而温度敏感的彩色水凝胶是通过自组装胶体光子晶体在聚（N-异丙基丙烯酰胺）（PNiPAM）。蜡烛烟尘的沉积不仅提高了光热性能，而且还形成了具有自清洁功能的超疏水表面。光热层吸收阳光并将其转化为热量，然后将其转移到水凝胶中。由于热致体积收缩，水凝胶的结构颜色发生变化。随着太阳强度从 0.62 增加到 1.27 kW/m ²，结构颜色明显从红色变为橙色、黄色、绿色、青色和蓝色，反射峰相应地从 640 nm 转移到 460 nm。颜色变化非常明显，肉眼很容易观察到，这表明通过读取结构色可以很容易地检测到太阳强度。这种免电自洁式太阳能传感器可长期工作而无需维护，适用于智能家居、农业等广泛的应用前景。

更新日期：2021-07-21

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