Mikhlin Yuri, Likhatski Maxim, Borisov Roman, Karpov Denis, Vorobyev Sergey
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russia.
Department of Chemistry, Bar-Ilan University, Ramat Gan 52900, Israel.
Materials (Basel). 2023 Sep 24;16(19):6381. doi: 10.3390/ma16196381.
Two-dimensional (2D) materials and phenomena attract huge attention in modern science. Herein, we introduce a family of layered materials inspired by the minerals valleriite and tochilinite, which are composed of alternating "incompatible", and often incommensurate, quasi-atomic sheets of transition metal chalcogenide (sulfides and selenides of Fe, Fe-Cu and other metals) and hydroxide of Mg, Al, Fe, Li, etc., stacked via electrostatic interaction rather than van der Waals forces. We survey the data available on the composition and structure of the layered minerals, laboratory syntheses of such materials and the effect of reaction conditions on the phase purity, morphology and composition of the products. The spectroscopic results (Mössbauer, X-ray photoelectron, X-ray absorption, Raman, UV-vis, etc.), physical (electron, magnetic, optical and some others) characteristics, a specificity of thermal behavior of the materials are discussed. The family of superconductors (FeSe)·(Li,Fe)(OH) having a similar layered structure is briefly considered too. Finally, promising research directions and applications of the valleriite-type substances as a new class of prospective multifunctional 2D materials are outlined.
二维（2D）材料和现象在现代科学中备受关注。在此，我们介绍一类受矿物瓦硫镍矿和纤硫镍矿启发的层状材料，它们由交替的“不相容”且通常不匹配的准原子薄片组成，这些薄片包括过渡金属硫族化物（铁、铁 - 铜及其他金属的硫化物和硒化物）以及镁、铝、铁、锂等的氢氧化物，通过静电相互作用而非范德华力堆叠而成。我们综述了关于层状矿物的组成和结构、此类材料的实验室合成以及反应条件对产物的相纯度、形态和组成的影响等现有数据。讨论了光谱结果（穆斯堡尔谱、X射线光电子能谱、X射线吸收光谱、拉曼光谱、紫外 - 可见光谱等）、物理特性（电子、磁性、光学等）以及材料热行为的特异性。还简要考虑了具有类似层状结构的超导体系（FeSe）·（Li，Fe）（OH）。最后，概述了瓦硫镍矿型物质作为一类新型潜在多功能二维材料的有前景的研究方向和应用。
