Formation of copper boride on Cu(111)

Yue, Chengguang; Weng, Xiao-Ji; Gao, Guoying; Oganov, Artem R.; Dong, Xiao; Shao, Xin; Sun, Junqiang; Xu, Bo; Wang, Hui-Tian; Zhou, Xiang-Feng; Tian, Yongjun

doi:10.1016/j.fmre.2021.05.003

Cited by 20 publications

(19 citation statements)

References 38 publications

(21 reference statements)

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“…This has been addressed by using a nanometerthick Cu (111) thin film on a sapphire substrate, which enables the full coverage of its surface by borophene. 40 226 This copper boride formed a large single phase with herringbone-like structure and metallic conductivity, akin to the borophene grown on Cu (111) reported by Wu and coworkers. 40 This questions the reliable formation of borophene on Cu (111) and requires further investigations.…”

Section: Summary and Future Outlookmentioning

confidence: 73%

“…), ideally on those that can enable measurements of borophene properties (e.g., lateral charge transport). Further, a recent experimental work on the epitaxial growth of B on Cu(111) has reported the unexpected discovery of ordered 2D copper boride (Cu 8 B 14 ) through the combination of STM observation and DFT calculations . This copper boride formed a large single phase with herringbone-like structure and metallic conductivity, akin to the borophene grown on Cu(111) reported by Wu and co-workers .…”

Section: Summary and Future Outlookmentioning

confidence: 90%

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Borophene: Two-dimensional Boron Monolayer: Synthesis, Properties, and Potential Applications

et al. 2021

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Borophene, a monolayer of boron, has risen as a new exciting two-dimensional (2D) material having extraordinary properties, including anisotropic metallic behavior and flexible (orientation-dependent) mechanical and optical properties. This review summarizes the current progress in the synthesis of borophene on various metal substrates, including Ag(110), Ag(100), Au(111), Ir(111), Al(111), and Cu(111), as well as heterostructuring of borophene. In addition, it discusses the mechanical, thermal, magnetic, electronic, optical, and superconducting properties of borophene and the effects of elemental doping, defects, and applied mechanical strains on these properties. Furthermore, the promising potential applications of borophene for gas sensing, energy storage and conversion, gas capture and storage applications, and possible tuning of the material performance in these applications through doping, formation of defects, and heterostructures are illustrated based on available theoretical studies. Finally, research and application challenges and the outlook of the whole borophene's field are given.

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Section: Summary and Future Outlookmentioning

confidence: 73%

Section: Summary and Future Outlookmentioning

confidence: 90%

Borophene: Two-dimensional Boron Monolayer: Synthesis, Properties, and Potential Applications

et al. 2021

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“…In contrast to graphene that must inherit its lattice structure from graphite, borophene features structural diversity, manifested as a highly variable pattern of hollow hexagons in a reference triangular grid, − thereby promising a substantial breadth of physical and chemical properties. Extensive theoretical and experimental studies have shown that borophene exhibits structural anisotropy, ,,, high in-plane elasticity, unprecedented bendability, substantial metallicity, ,,, distorted Dirac Fermions, − visible range plasmonics, − even phonon-mediated superconductivity , and controllable hydrogenation. − However, borophene does not have its own fixed structure but depends on the epitaxial substrate. ,,− It means that any synthesized borophene is given a lattice structure only pertaining to that substrate; if transferred, it has a propensity of undergoing structural reconstruction and instability upon, for example, thermal perturbation. For practical applications, it is important to obtain borophene with a lattice structure that is highly robust against variation in its environment.…”

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confidence: 99%

Quasi-Freestanding Bilayer Borophene on Ag(111)

Xuan

Yang

et al. 2022

Nano Lett.

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The lattice structure of monolayer borophene depends sensitively on the substrate yet is metallic independent of the environment. Here, we show that bilayer borophene on Ag(111) shares the same ground state as its freestanding counterpart that becomes semiconducting with an indirect bandgap of 1.13 eV, as evidenced by an extensive structural search based on first-principles calculations. The bilayer structure is composed of two covalently bonded v 1/12 boron monolayers that are stacked in an AB mode. The interlayer bonds not only localize electronic states that are otherwise metallic in monolayer borophene but also in part decouple the whole bilayer from the substrate, resulting in a quasi-freestanding system. More relevant is that the predicted bilayer model of a global minimum agrees well with recently synthesized bilayer borophene on Ag(111) in terms of lattice constant, topography, and moiré pattern.

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“…Two-dimensional compounds can be formed between elements that do not form bulk compounds, e.g., copper borides . Currently, there are three main ways to obtain 2D thin films: (i) mechanical exfoliation , and (ii) atomic layer and (iii) chemical vapor , depositions.…”

mentioning

confidence: 99%

Exotic Two-Dimensional Structure: The First Case of Hexagonal NaCl

Tikhomirova

Tantardini

Sukhanova

et al. 2020

J. Phys. Chem. Lett.

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NaCl is one of the simplest compounds and was thought to be wellunderstood, and yet, unexpected complexities related to it were uncovered at high pressure and in low-dimensional states. Here, exotic hexagonal NaCl thin films on the (110) diamond surface were crystallized in the experiment following a theoretical prediction based on ab initio evolutionary algorithm USPEX. State-of-the-art calculations and experiments showed the existence of a hexagonal NaCl thin film, which is due to the strong chemical interaction of the NaCl film with the diamond substrate.

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Formation of copper boride on Cu(111)

Cited by 20 publications

References 38 publications

Borophene: Two-dimensional Boron Monolayer: Synthesis, Properties, and Potential Applications

Borophene: Two-dimensional Boron Monolayer: Synthesis, Properties, and Potential Applications

Quasi-Freestanding Bilayer Borophene on Ag(111)

Exotic Two-Dimensional Structure: The First Case of Hexagonal NaCl

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