Inorganic–organic hybrid materials offer a wide variety of intriguing properties by combining their different characteristics and (chemical/physical) behavior, and the resulting smart materials find potential applications in areas such as energy technologies and drug delivery systems. Especially responsive two-dimensional carbides that belong to the class of MXenes benefit from this additional functionality in combination with their unique mechanical and electronic properties and bare potential for use as catalysts and sensors. Here, we therefore graft a stimuli-responsive polymer (poly(2-(dimethylamino)ethyl methacrylate (PDMAEMA)) from the surface of a Ti-based two-dimensional carbide (MXene) using the OH groups on the MXene surface as a linker for the organic molecules. Successful fabrication of the hybrid material as well as covalent bonding between the inorganic component and the thermoresponsive polymer is shown by X-ray powder diffraction, IR and X-ray photoelectron spectroscopy, thermal analysis, and electron microscopy. We further demonstrate a reversible change of conductivity of thin films of this smart hybrid material using temperature as an external stimulus and enhance the mechanistic understanding by density functional theory (DFT) calculations. Such systems could therefore be used as temperature sensors in chemical reactions or microelectronics.

中文翻译：

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电导率可切换的智能混合MXene的合成

无机－有机杂化材料通过将它们的不同特性和（化学/物理）行为相结合，提供了多种有趣的特性，并且由此产生的智能材料在能源技术和药物输送系统等领域具有潜在的应用前景。特别是属于MXene类的响应性二维碳化物，得益于这种附加功能，并结合了其独特的机械和电子性能以及用作催化剂和传感器的潜在潜力。因此，在这里，我们使用MXene表面上的OH基团作为连接基，从Ti基二维碳化物（MXene）的表面接枝了一种刺激响应聚合物（甲基丙烯酸2-（二甲基氨基）乙酯（PDMAEMA））。对于有机分子。X射线粉末衍射，IR和X射线光电子能谱，热分析和电子显微镜显示了杂化材料的成功制造以及无机组分与热响应性聚合物之间的共价键合。我们进一步证明了使用温度作为外部刺激，这种智能混合材料的薄膜电导率可逆变化，并通过密度泛函理论（DFT）计算增强了对机械的理解。因此，此类系统可用作化学反应或微电子学中的温度传感器。我们进一步证明了使用温度作为外部刺激，这种智能混合材料的薄膜电导率可逆变化，并通过密度泛函理论（DFT）计算增强了对机械的理解。因此，此类系统可用作化学反应或微电子学中的温度传感器。我们进一步证明了使用温度作为外部刺激，这种智能混合材料的薄膜电导率可逆变化，并通过密度泛函理论（DFT）计算增强了对机械的理解。因此，此类系统可用作化学反应或微电子学中的温度传感器。