Versatility of infrared properties of MXenes
Versatility of infrared properties of MXenes
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DOI：
10.1016/j.mattod.2023.02.024
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发表时间：
2023-05-16
期刊：
影响因子：
24.2
通讯作者：
Gogotsi, Yury
中科院分区：
文献类型：
--
作者：
Han, Meikang;Zhang, Danzhen;Gogotsi, Yury
能够控制红外（IR）发射的选择性和可反射性薄膜和涂层对于高度集成的热管理系统至关重要，但使用传统材料生产具有挑战性。在这里，我们报告说，二维碳化物和碳氮化物的MXene家族提供了广泛的红外发射率值（-0.06-0.59），具有不同的颜色，随MXene的组成和结构而变化。具体地，200 nm厚的紫色Ti 3C 2 TX涂层在3-25 lm的波长下具有0.06的平均IR发射率，而金Nb 2CTX涂层为0.59。我们证明了红外发射率可以通过在固溶体MXene中结合不同的金属来微调。此外，使用不同的MXene涂层和图案化的MXene织物验证了不同温度下的IR识别能力。MXene在光学和红外波长上的多功能性为开发基于MXene的智能灵活设备和可穿戴设备提供了一个平台，这些设备和可穿戴设备能够进行选择性和本地化的热管理，旨在实现辐射加热/冷却、红外识别、光热转换和热成像。
Selective and ultrathin films and coatings capable of controlling infrared (IR) emission are crucial for highly integrated thermal management systems, but are challenging produce using conventional materials. Here, we report that the MXene family of two-dimensional carbides and carbonitrides offers a broad range of IR emissivity values (-0.06-0.59) with diverse colors, varying with MXene composition and structure. Specifically, 200 nm thick purple Ti3C2TX coating has an average IR emissivity of 0.06, while gold Nb2CTX coating is 0.59 at wavelengths from 3-25 lm. We demonstrate that the IR emissivity can be finely tuned by combining different metals in solid-solution MXenes. Furthermore, the IR identification capability at varying temperatures was validated using different MXene coatings and patterned MXene fabrics. The versatility of MXenes at optical and infrared wavelengths provides a platform for developing MXene-based smart, flexible devices and wearables capable of selective and localized thermal management, aiming at radiative heating/cooling, IR identification, photothermal conversion, and thermal imaging.