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- W2617368613 abstract "We report a new pathway to fabricate armchair graphene nanoribbons with five carbon atoms in the cross section (5-AGNRs) on Cu(111) surfaces. Instead of using haloaromatics as precursors, the 5-AGNRs are synthesized <italic>via</italic> a surface assisted decarboxylation reaction of perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA). The on-surface decarboxylation of PTCDA can produce extended copper–perylene chains on Cu(111) that are able to transform into graphene nanoribbons after annealing at higher temperatures (<italic>ca.</italic> 630 K). Due to the low yield (<italic>ca.</italic> 20%) of GNRs upon copper extrusion, various gases are introduced to assist the transformation of the copper–perylene chains into the GNRs. Typical reducing gases (H<sub>2</sub> and CO) and oxidizing gas (O<sub>2</sub>) are evaluated for their performance in breaking aryl–Cu bonds. This method enriches on-surface protocols for the synthesis of AGNRs using non-halogen containing precursors." @default.
- W2617368613 created "2017-06-05" @default.
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- W2617368613 date "2017-01-01" @default.
- W2617368613 modified "2023-10-18" @default.
- W2617368613 title "A new on-surface synthetic pathway to 5-armchair graphene nanoribbons on Cu(111) surfaces" @default.
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- W2617368613 doi "https://doi.org/10.1039/c7fd00129k" @default.
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