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Macroscopic Single-Phase Monolayer Borophene on Arbitrary Substrates
journal contributionposted on 2022-05-02, 18:03 authored by Borna Radatović, Valentino Jadriško, Sherif Kamal, Marko Kralj, Dino Novko, Nataša Vujičić, Marin Petrović
A major challenge in the investigation of all 2D materials is the development of synthesis protocols and tools which would enable their large-scale production and effective manipulation. The same holds for borophene, where experiments are still largely limited to in situ characterizations of small-area samples. In contrast, our work is based on millimeter-sized borophene sheets, synthesized on an Ir(111) surface in ultrahigh vacuum. Besides high-quality macroscopic synthesis, as confirmed by low-energy electron diffraction (LEED) and atomic force microscopy (AFM), we also demonstrate a successful transfer of borophene from Ir to a Si wafer via electrochemical delamination process. Comparative Raman spectroscopy, in combination with the density functional theory (DFT) calculations, proved that borophene’s crystal structure has been preserved in the transfer. Our results demonstrate successful growth and manipulation of large-scale, single-layer borophene sheets with minor defects and ambient stability, thus expediting borophene implementation into more complex systems and devices.
still largely limitedenergy electron diffractiondensity functional theorycomparative raman spectroscopyatomic force microscopysized borophene sheetsphase monolayer borophenelayer borophene sheetsquality macroscopic synthesissynthesis protocolsborophene ’would enableultrahigh vacuumsitu minor defectsmajor challengemacroscopic singlecrystal structurecomplex systemsbesides higharea samplesarbitrary substratesambient stabilityalso demonstrateafm ),2d materials