Thin Film Physics, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden.
Materials Design, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden.
Science. 2021 Aug 13;373(6556):801-805. doi: 10.1126/science.abf6239.
Extensive research has been invested in two-dimensional (2D) materials, typically synthesized by exfoliation of van der Waals solids. One exception is MXenes, derived from the etching of constituent layers in transition metal carbides and nitrides. We report the experimental realization of boridene in the form of single-layer 2D molybdenum boride sheets with ordered metal vacancies, MoBT (where T is fluorine, oxygen, or hydroxide surface terminations), produced by selective etching of aluminum and yttrium or scandium atoms from 3D in-plane chemically ordered (MoY)AlB and (MoSc)AlB in aqueous hydrofluoric acid. The discovery of a 2D transition metal boride suggests a wealth of future 2D materials that can be obtained through the chemical exfoliation of laminated compounds.
研究人员投入大量精力研究二维（2D）材料，这些材料通常通过剥离范德华固体来合成。其中一个例外是 MXenes，它是通过过渡金属碳化物和氮化物的组成层的蚀刻得到的。我们报告了硼烯以单层二维钼硼化物片的形式的实验实现，该单层二维钼硼化物片具有有序的金属空位，MoBT（其中 T 是氟、氧或氢氧化物表面终止），通过选择性蚀刻 3D 层内化学有序（MoY）AlB 和（MoSc）AlB 中的铝和钇或钪原子在水中的氢氟酸中得到。这种二维过渡金属硼化物的发现表明，通过层状化合物的化学剥离，可以获得大量的未来二维材料。
