Coupling Borophene to Graphene in Air‐Stable Heterostructures

Author:

Jugovac Matteo1ORCID,Cojocariu Iulia12,Brondin Carlo Alberto13,Crotti Alessandro3,Petrović Marin4,Bonetti Stefano35,Locatelli Andrea1,Menteş Tevfik Onur1

Affiliation:

1. Elettra – Sincrotrone Trieste S.C.p.A. S.S. 14 km 163.5 Trieste 34149 Italy

2. Dipartimento di Fisica Università degli studi di Trieste Via A. Valerio 2 Trieste 34127 Italy

3. Department of Molecular Sciences and Nanosystems Ca’ Foscari University of Venice via Torino 155 Venice 30172 Italy

4. Center of Excellence for Advanced Materials and Sensing Devices Institute of Physics Bijenička 46 Zagreb 10000 Croatia

5. Department of Physics Stockholm University Stockholm 10691 Sweden

Abstract

AbstractArtificial 2D van der Waals heterostructures with controllable vertical stacking and rotational orientation exhibit multifaceted electronic properties that are appealing for applications in fields ranging from optoelectronics to energy storage. Along with transition metal dichalcogenides and graphene, borophene has recently emerged as a promising building block for 2D devices due to its conductive nature as well as its exceptional mechanical and electronic properties. Here, it is demonstrated that the combination of the dissolution‐segregation process and chemical vapor deposition allows for the synthesis of graphene/borophene heterostructures of the highest crystalline and chemical quality, in which graphene sits on top of the borophene layer with metallic character. The formation of laterally distinct micron‐sized areas allows a comparative study of borophene, graphene, and the graphene–borophene heterostack in terms of their electronic properties and stability in a reactive environment. Whereas pristine borophene is particularly prone to oxidation, the graphene–borophene heterostack is chemically inert and enables the conservation of borophene's character even after exposure to air. This study opens up new perspectives for the scalable synthesis of graphene–borophene heterostacks with enhanced ability to preserve the metallic character and electronic properties of borophene.

Funder

Hrvatska Zaklada za Znanost

Publisher

Wiley

Subject

Electronic, Optical and Magnetic Materials

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