  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.
