Boridene: Two-dimensional Mo4/3B2-x with ordered metal vacancies obtained by chemical exfoliation

被引：226

作者：

Zhou, Jie ^{[1
]}

Palisaitis, Justinas ^{[2
]}

Halim, Joseph ^{[1
]}

Dahlqvist, Martin ^{[1
]}

Tao, Quanzheng ^{[1
]}

Persson, Ingemar ^{[2
]}

Hultman, Lars ^{[2
]}

Persson, Per O. A. ^{[2
]}

Rosen, Johanna ^{[1
]}

机构：

[1] Linkoping Univ, Dept Phys Chem & Biol IFM, Mat Design, SE-58183 Linkoping, Sweden

[2] Linkoping Univ, Dept Phys Chem & Biol IFM, Thin Film Phys, SE-58183 Linkoping, Sweden

来源：

SCIENCE | 2021年 / 373卷 / 6556期

基金：

瑞典研究理事会; 中国国家自然科学基金;

关键词：

TOTAL-ENERGY CALCULATIONS; PLANE-WAVE; THIN-FILMS; NANOSHEETS; EVOLUTION; XPS; SOLIDS; OXIDES; COHP; RICH;

D O I：

10.1126/science.abf6239

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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, Mo4/3B2-xTz (where T-z is fluorine, oxygen, or hydroxide surface terminations), produced by selective etching of aluminum and yttrium or scandium atoms from 3D in-plane chemically ordered (Mo2/3Y1/3)(2)AlB2 and (Mo2/3Sc1/3)(2)AlB2 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.

引用

页码：801 / +

页数：55

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