Owing to their exceptional characteristics, such as one‐atom thickness, high specific surface area, and tunability of surfaces, 2D materials are excellent templates to study the surface‐dependent gas adsorption phenomenon. Moreover, the properties of 2D materials like morphology, bandgap, structure, and carrier mobility can be modulated easily by modification methods such as functionalization, defect and doping engineering. These modifications create and activate unconventional inert and active sites, leading to the selective adsorption of gases via mechanisms such as charge transfer kinetics, Schottky‐barrier modification, and surface interactions. These methods enhance the adsorption sites by adding covalent and non‐covalent moieties to the 2D surface and play a critical role in developing ultrafast gas sensing with high sensitivity, selectivity, fast response/recovery rates, and low detection limits. Here, this perspective is presented on the mechanism of the adsorption process of gases on modified 2D surfaces based on recent studies related to adsorption‐dependent applications of 2D materials.

中文翻译：

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2D 材料上气体吸附的机理见解


由于其特殊的特性，例如单原子厚度、高比表面积和表面可调性，二维材料是研究表面依赖性气体吸附现象的优秀模板。此外，二维材料的性能，如形态、带隙、结构和载流子迁移率，可以很容易地通过功能化、缺陷和掺杂工程等改性方法进行调节。这些修饰产生并激活非常规的惰性和活性位点，导致通过电荷转移动力学、肖特基势垒修饰和表面相互作用等机制对气体进行选择性吸附。这些方法通过在 2D 表面添加共价和非共价部分来增强吸附位点，并在开发具有高灵敏度、选择性、快速响应/回收率和低检测限的超快气体传感中发挥关键作用。在这里，基于与 2D 材料的吸附依赖性应用相关的最新研究，提出了气体在改性 2D 表面上的吸附过程机制的观点。