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Using density-functional theory calculations, we studied the electronic properties of graphene nanoribbons (GNRs) with potassium (K) atoms adsorption on the edges of GNRs. Our simulations showed that the electronic structure of the armchair GNR (AGNR) is changed from semiconductor to metal due to the charge transfer from potassium adatoms to the edge carbon atoms. It was observed in AGNR that the...
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