<br>通过 Rational Surface Engineering 为智能可视化传感器制备彩虹色碳纳米管,Advanced Science

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通过 Rational Surface Engineering 为智能可视化传感器制备彩虹色碳纳米管
Advanced Science ( IF 14.3 ) Pub Date : 2023-08-27 , DOI: 10.1002/advs.202303593
Jing Zhang _{1,

2} , Xueqing Tang _{1,

2} , Jie Wei ₃ , Shan Cong _{1,

2} , Siqi Zhu ₂ , Yaowu Li _{1,

2} , Jian Yao _{1,

2} , Weibang Lyu _{1,

2} , Hehua Jin _{1,

2} , Meng Zhao ₃ , Zhigang Zhao _{1,

2} , Qingwen Li _{1,

2}

Affiliation

表面工程对于开发具有新颖性能、多功能性和智能功能的材料非常有效，这些材料可以使其在新兴应用中使用。然而，碳纳米管（CNT）的表面工程以增加颜色特性和功能尚未得到充分确立。在此，开发了一种新的表面工程策略，以实现具有高色度、高亮度和强色差的彩虹色 CNT，用于视觉氢传感。这种方法涉及在 CNT 上构建 W 和 WO₃ 的双层结构（CNT/W/WO₃）以及在 CNT 上构建 W、WO₃ 和 Pd 的三层结构（CNT/W/WO₃/Pd），厚度可调。由于薄膜的强烈干扰，所得的 CNT/W/WO₃ 复合薄膜呈现出多种可见颜色，包括黄色、橙色、品红色、紫色、蓝色、青色和绿色。这种着色方法在亮度和色度方面都优于其他结构着色方法。具有多孔特性的智能 CNT/W/WO₃/Pd 薄膜可快速、精确地检测氢气泄漏部位。此外，智能 CNT/W/WO₃/Pd 薄膜允许在 58 秒内用肉眼检测到低至 0.6% H₂/空气的浓度，为检测和定位车载储氢罐中的泄漏提供了一种非常实用和安全的方法。

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Rainbow-Colored Carbon Nanotubes via Rational Surface Engineering for Smart Visualized Sensors

Surface engineering is effective for developing materials with novel properties, multifunctionality, and smart features that can enable their use in emerging applications. However, surface engineering of carbon nanotubes (CNTs) to add color properties and functionalities has not been well established. Herein, a new surface engineering strategy is developed to achieve rainbow-colored CNTs with high chroma, high brightness, and strong color travel for visual hydrogen sensing. This approach involved constructing a bilayer structure of W and WO₃ on CNTs (CNT/W/WO₃) and a trilayer structure of W, WO₃, and Pd on CNTs (CNT/W/WO₃/Pd) with tunable thicknesses. The resulting CNT/W/WO₃ composite film exhibits a wide range of visible colors, including yellow, orange, magenta, violet, blue, cyan, and green, owing to strong thin-film interference. This coloring method outperforms other structural coloring methods in both brightness and chroma. The smart CNT/W/WO₃/Pd films with porous characteristics quickly and precisely detect the hydrogen leakage site. Furthermore, the smart CNT/W/WO₃/Pd films allow a concentration as low as 0.6% H₂/air to be detected by the naked eye in 58 s, offering a very practical and safe approach for the detection and localization of leaks in onboard hydrogen tanks.

更新日期：2023-08-27

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