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- W2145944384 abstract "Developments in semiconductor technology are propelling the dimensions of devices down to 10 nm, but facing great challenges in manufacture at the sub-10 nm scale. Nanotechnology can fabricate nanoribbons from two-dimensional atomic crystals, such as graphene, with widths below the 10 nm threshold, but their geometries and properties have been hard to control at this scale. Here we find that robust ultrafine molybdenum-sulfide ribbons with a uniform width of 0.35 nm can be widely formed between holes created in a MoS2 sheet under electron irradiation. In situ high-resolution transmission electron microscope characterization, combined with first-principles calculations, identifies the sub-1 nm ribbon as a Mo5S4 crystal derived from MoS2, through a spontaneous phase transition. Further first-principles investigations show that the Mo5S4 ribbon has a band gap of 0.77 eV, a Young’s modulus of 300GPa and can demonstrate 9% tensile strain before fracture. The results show a novel top–down route for controllable fabrication of functional building blocks for sub-nanometre electronics. Fabricating semiconductor devices with dimensions below 10 nm presents significant challenges. Here, Liu et al. use controlled electron irradiation to remove atoms in an MoS2 sheet, creating Mo5S4nanoribbons with a uniform width of 0.35 nm and a theoretical band gap of 0.77 eV." @default.
- W2145944384 created "2016-06-24" @default.
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- W2145944384 date "2013-04-30" @default.
- W2145944384 modified "2023-10-06" @default.
- W2145944384 title "Top–down fabrication of sub-nanometre semiconducting nanoribbons derived from molybdenum disulfide sheets" @default.
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- W2145944384 doi "https://doi.org/10.1038/ncomms2803" @default.
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