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“Bite” defects in bottom-up graphene nanoribbons
Important findings in the context of the potential applications of graphene nanoribbons in nanoelectronics and quantum technology
Empa / EPFL (adapted with permission from J. Phys. Chem. Lett. 2021,12, 4692-4696, Copyright 2021 American Chemical Society)
Left: STM image of bottom-up zigzag graphene nanoribbons. Right: Spin-density in the vicinity of a bite defect in a zigzag graphene nanoribbon. Zoom in ).addClass( image-details ); var $imageCaption = $( ).addClass( image-caption ).text(caption); $imageDetails.append($imageCaption); element = $( ).append( × ).append($imageHolder).append($imageDetails)[0]; img.draggable = false; if (title) { element.title = title; } if (altText) { element.alt = altText; ....
Scientists at Empa and EPFL have identified a new type of defect as the most common source of disorder in on-surface synthesized graphene nanoribbons, a novel class of carbon-based materials that may prove extremely useful in next-generation electronic devices. The researchers identified the atomic structure of these so-called bite defects and investigated their effect on quantum electronic transport. These kinds of defective zigzag-edged nanoribbons may provide suitable platforms for certain applications in spintronics. ....
Researchers Investigate Defects in Bottom-Up Armchair Graphene Nanoribbons Written by AZoNanoMay 19 2021 Graphene nanoribbons (GNRs), narrow strips of single-layer graphene, have interesting physical, electrical, thermal, and optical properties because of the interplay between their crystal and electronic structures. These novel characteristics have pushed them to the forefront in the search for ways to advance next-generation nanotechnologies. While bottom-up fabrication techniques now allow the synthesis of a broad range of graphene nanoribbons that feature well-defined edge geometries, widths, and heteroatom incorporations, the question of whether or not structural disorder is present in these atomically precise GNRs, and to what extent, is still subject to debate. The answer to this riddle is of critical importance to any potential applications or resulting devices. ....