Zhang Jing, Tang Xueqing, Wei Jie, Cong Shan, Zhu Siqi, Li Yaowu, Yao Jian, Lyu Weibang, Jin Hehua, Zhao Meng, Zhao Zhigang, Li Qingwen
School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, China.
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Adv Sci (Weinh). 2023 Oct;10(29):e2303593. doi: 10.1002/advs.202303593. Epub 2023 Aug 27.
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 WO on CNTs (CNT/W/WO ) and a trilayer structure of W, WO , and Pd on CNTs (CNT/W/WO /Pd) with tunable thicknesses. The resulting CNT/W/WO 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/WO /Pd films with porous characteristics quickly and precisely detect the hydrogen leakage site. Furthermore, the smart CNT/W/WO /Pd films allow a concentration as low as 0.6% H /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.
表面工程对于开发具有新颖特性、多功能性和智能特性的材料非常有效，这些特性能够使材料应用于新兴领域。然而，对碳纳米管（CNT）进行表面工程以赋予其颜色特性和功能的研究尚未完善。在此，我们开发了一种新的表面工程策略，以实现具有高色度、高亮度和强颜色变化的彩虹色碳纳米管，用于可视化氢气传感。该方法包括在碳纳米管上构建W和WO的双层结构（CNT/W/WO）以及W、WO和Pd的三层结构（CNT/W/WO/Pd），其厚度可调。由于强烈的薄膜干涉，所得的CNT/W/WO复合膜呈现出广泛的可见颜色，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均优于其他结构着色方法。具有多孔特性的智能CNT/W/WO/Pd薄膜能够快速、精确地检测氢气泄漏位置。此外，智能CNT/W/WO/Pd薄膜能够在58秒内通过肉眼检测到低至0.6% H/空气的浓度，为车载氢气罐泄漏的检测和定位提供了一种非常实用且安全的方法。
