Honeycomb Boron on Al(111) : From the Concept of Borophene to the Two-Dimensional Boride
Preobrajenski, Alexei B. LU ; Lyalin, Andrey ; Taketsugu, Tetsuya ; Vinogradov, Nikolay A. LU
and Vinogradov, Alexander S.
(2021)
In ACS Nano
15(9).
p.15153-15165
- Abstract
A great variety of two-dimensional (2D) boron allotropes (borophenes) were extensively studied in the past decade in the quest for graphene-like materials with potential for advanced technological applications. Among them, the 2D honeycomb boron is of specific interest as a structural analogue of graphene. Recently it has been synthesized on the Al(111) substrate; however it remains unknown to what extent does honeycomb boron behave like graphene. Here we elucidate the structural and electronic properties of this unusual 2D material with a combination of core-level X-ray spectroscopies, scanning tunneling microscopy, and DFT calculations. We demonstrate that in contrast to graphene on lattice-mismatched metal surfaces, honeycomb boron... (More)
A great variety of two-dimensional (2D) boron allotropes (borophenes) were extensively studied in the past decade in the quest for graphene-like materials with potential for advanced technological applications. Among them, the 2D honeycomb boron is of specific interest as a structural analogue of graphene. Recently it has been synthesized on the Al(111) substrate; however it remains unknown to what extent does honeycomb boron behave like graphene. Here we elucidate the structural and electronic properties of this unusual 2D material with a combination of core-level X-ray spectroscopies, scanning tunneling microscopy, and DFT calculations. We demonstrate that in contrast to graphene on lattice-mismatched metal surfaces, honeycomb boron cannot wiggle like a blanket on Al(111), but rather induces reconstruction of the top metal layer, forming a stoichiometric AlB2 sheet on top of Al. Our conclusions from theoretical modeling are fully supported by X-ray absorption spectra showing strong similarity in the electronic structure of honeycomb boron on Al(111) and thick AlB2 films. On the other hand, a clear separation of the electronic states of the honeycomb boron into π- and σ-subsystems indicates an essentially 2D nature of the electronic system in both one-layer AlB2 and bulk AlB2.
(Less)
- author
- Preobrajenski, Alexei B.
LU
; Lyalin, Andrey
; Taketsugu, Tetsuya
; Vinogradov, Nikolay A.
LU
and Vinogradov, Alexander S.
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- 2D materials, aluminum boride, borophene, DFT, NEXAFS, STM, XPS
- in
- ACS Nano
- volume
- 15
- issue
- 9
- pages
- 15153 - 15165
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:34460239
- scopus:85114620021
- ISSN
- 1936-0851
- DOI
- 10.1021/acsnano.1c05603
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.
- id
- 8badd9ee-c455-4ab5-9fe2-430319dfd91b
- date added to LUP
- 2021-10-18 15:35:23
- date last changed
- 2025-03-09 19:50:31
@article{8badd9ee-c455-4ab5-9fe2-430319dfd91b,
abstract = {{<p>A great variety of two-dimensional (2D) boron allotropes (borophenes) were extensively studied in the past decade in the quest for graphene-like materials with potential for advanced technological applications. Among them, the 2D honeycomb boron is of specific interest as a structural analogue of graphene. Recently it has been synthesized on the Al(111) substrate; however it remains unknown to what extent does honeycomb boron behave like graphene. Here we elucidate the structural and electronic properties of this unusual 2D material with a combination of core-level X-ray spectroscopies, scanning tunneling microscopy, and DFT calculations. We demonstrate that in contrast to graphene on lattice-mismatched metal surfaces, honeycomb boron cannot wiggle like a blanket on Al(111), but rather induces reconstruction of the top metal layer, forming a stoichiometric AlB2 sheet on top of Al. Our conclusions from theoretical modeling are fully supported by X-ray absorption spectra showing strong similarity in the electronic structure of honeycomb boron on Al(111) and thick AlB2 films. On the other hand, a clear separation of the electronic states of the honeycomb boron into π- and σ-subsystems indicates an essentially 2D nature of the electronic system in both one-layer AlB2 and bulk AlB2.</p>}},
author = {{Preobrajenski, Alexei B. and Lyalin, Andrey and Taketsugu, Tetsuya and Vinogradov, Nikolay A. and Vinogradov, Alexander S.}},
issn = {{1936-0851}},
keywords = {{2D materials; aluminum boride; borophene; DFT; NEXAFS; STM; XPS}},
language = {{eng}},
number = {{9}},
pages = {{15153--15165}},
publisher = {{The American Chemical Society (ACS)}},
series = {{ACS Nano}},
title = {{Honeycomb Boron on Al(111) : From the Concept of Borophene to the Two-Dimensional Boride}},
url = {{http://dx.doi.org/10.1021/acsnano.1c05603}},
doi = {{10.1021/acsnano.1c05603}},
volume = {{15}},
year = {{2021}},
}