Since the advent of monolayered 2D transition metal carbide and nitrides (MXenes) in 2011, the number of different monolayer systems and the study thereof have been on the rise. Mo2 Ti2 C3 is one of the least studied MXenes and new insights to this material are of value to the field. Here, the stability of Mo2 Ti2 C3 under electron irradiation is investigated. A transmission electron microscope (TEM) is used to study the structural and elemental changes in situ. It is found that Mo2 Ti2 C3 is reasonably stable for the first 2 min of irradiation. However, structural changes occur thereafter, which trigger increasingly rapid and significant rearrangement. This results in the formation of pores and two new nanomaterials, namely, N-doped graphene membranes and Mo nanoribbons. The study provides insight into the stability of Mo2 Ti2 C3 monolayers against electron irradiation, which will allow for reliable future study of the material using TEM. Furthermore, these findings will facilitate further research in the rapidly growing field of electron beam driven chemistry and engineering of nanomaterials.

中文翻译：

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Mo2 Ti2 C3 MXene单层原位N掺杂石墨烯和Mo纳米带的形成。

自2011年单层2D过渡金属碳化物和氮化物（MXenes）问世以来，不同单层系统的数量及其研究一直在增加。Mo2 Ti2 C3是研究最少的MXene之一，对此材料的新见识对该领域具有重要意义。在此，研究了Mo 2 Ti 2 C 3在电子辐照下的稳定性。透射电子显微镜（TEM）用于研究原位的结构和元素变化。发现Mo2 Ti2 C3在照射的前2分钟内相当稳定。但是，此后发生结构变化，从而触发了越来越迅速和重大的重新安排。这导致形成孔和两种新的纳米材料，即N掺杂的石墨烯膜和Mo纳米带。该研究提供了关于Mo2 Ti2 C3单层抗电子辐射稳定性的见解，这将为使用TEM对该材料进行可靠的未来研究提供依据。此外，这些发现将有助于在电子束驱动化学和纳米材料工程快速发展领域中的进一步研究。