Janus 2D materials via asymmetric molecular functionalization,Chemical Science

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Janus 2D materials via asymmetric molecular functionalization
Chemical Science ( IF 7.6 ) Pub Date : 2021-11-19 , DOI: 10.1039/d1sc05836c
Verónica Montes-García ₁ , Paolo Samorì ₁

Affiliation

Janus two-dimensional materials (2DMs) are a novel class of 2DMs in which the two faces of the material are either asymmetrically functionalized or are exposed to a different local environment. The diversity of the properties imparted to the two opposing sides enables the design of new multifunctional materials for applications in a broad variety of fields including opto-electronics, energy storage, and catalysis. In this perspective, we summarize the most enlightening experimental methods for the asymmetric chemical functionalization of 2DMs with tailored made (macro)molecules by means of a supratopic binding (one side) or antaratopic binding (two sides) process. We describe the emergence of unique electrical and optical characteristics resulting from the asymmetric dressing of the two surfaces. Representative examples of Janus 2DMs towards bandgap engineering, enhanced photoresponse and photoluminescence are provided. In addition, examples of Janus 2DMs for real applications such as energy storage (batteries and supercapacitors) and generation (photovoltaics), opto-electronics (field-effect transistors and photodetectors), catalysis, drug delivery, self-healing materials, chemical sensors and selective capture and separation of small molecules are also described. Finally, we discuss the future directions, challenges, and opportunities to expand the frontiers of Janus 2DMs towards technologies with potential impact in environmental science and biomedical applications.

中文翻译：

Janus 2D 材料通过不对称分子功能化

Janus 二维材料 (2DM) 是一类新型 2DM，其中材料的两个面要么不对称功能化，要么暴露在不同的局部环境中。赋予两个相对面的特性的多样性使得能够设计出适用于包括光电子、能量存储和催化在内的广泛领域的新型多功能材料。从这个角度来看，我们总结了通过超位结合（一侧）或反位结合（两侧）过程，用定制的（大）分子对 2DM 进行不对称化学功能化的最具启发性的实验方法。我们描述了由于两个表面的不对称修整而产生的独特的电学和光学特性。提供了 Janus 2DM 在带隙工程、增强光响应和光致发光方面的代表性示例。此外，Janus 2DM 的实际应用示例包括能量存储（电池和超级电容器）和发电（光伏）、光电子学（场效应晶体管和光电探测器）、催化、药物输送、自愈材料、化学传感器和还描述了小分子的选择性捕获和分离。最后，我们讨论了未来的方向、挑战和机遇，以将 Janus 2DM 的前沿扩展到对环境科学和生物医学应用具有潜在影响的技术。

更新日期：2021-11-24

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