Friends not Foes: Exfoliation of Non-van der Waals Materials,Accounts of Chemical Research

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Friends not Foes: Exfoliation of Non-van der Waals Materials
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2024-08-16 , DOI: 10.1021/acs.accounts.4c00295
Mulan Yang ₁ , Leslie M Schoop ₁

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Two-dimensional materials have been a focus of study for decades, resulting in the development of a library of nanosheets made by a variety of methods. However, many of these atomically thin materials are exfoliated from van der Waals (vdW) compounds, which inherently have weaker bonding between layers in the bulk crystal. Even though there are diverse properties and structures within this class of compounds, it would behoove the community to look beyond these compounds toward the exfoliation of non-vdW compounds as well. A particular class of non-vdW compounds that may be amenable to exfoliation are the ionically bonded layered materials, which are structurally similar to vdW compounds but have alkali ions intercalated between the layers. Although initially they may have been more difficult to exfoliate due to a lack of methodology beyond mechanical exfoliation, many synthesis techniques have been developed that have been used successfully in exfoliating non-vdW materials. In fact, as we will show, in some cases it has even proven to be advantageous to start the exfoliation from a non-vdW compound.

中文翻译：

朋友而不是敌人：非范德华材料的剥离

几十年来，二维材料一直是研究的焦点，导致了通过各种方法制造的纳米片库的开发。然而，许多这些原子级薄的材料是从范德华（vdW）化合物中剥离出来的，这些化合物本质上在块状晶体的层之间具有较弱的键合。尽管此类化合物具有不同的性质和结构，但业界有必要将目光投向这些化合物之外的非 vdW 化合物的剥离。一类可能容易剥落的特殊非 vdW 化合物是离子键合层状材料，其结构与 vdW 化合物相似，但在层之间插入有碱离子。尽管最初由于缺乏机械剥离之外的方法，它们可能更难以剥离，但已经开发了许多合成技术，并已成功用于剥离非 vdW 材料。事实上，正如我们将要展示的，在某些情况下，甚至已证明从非 vdW 化合物开始剥离是有利的。

更新日期：2024-08-16

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