TEM (transmission electron microscopy) images and elemental mapping EDX (energy dispersive X-ray spectroscopy) of bulk boron and borophene obtained during ball milling

These data contain TEM (transmission electron microscopy) images with corresponding elemental mapping EDX of bulk boron and borophene flakes after the ball-milling process (450 rpm, 6 h, 1 g). The data were collected to investigate the structure and morphology of the materials.