A planar-sheet nongraphitic zero-bandgap sp² carbon phase made by the low-temperature reaction of γ-graphyne.

ABSTRACT: The highest sheet symmetry form of graphyne, with one triple bond between each neighboring hexagon in graphene, irreversibly transforms exothermically at ambient pressure and low temperatures into a nongraphitic, planar-sheet, zero-bandgap phase consisting of intrasheet-bonded sp² carbons. The synthesis of this sp² carbon phase is demonstrated, and other carbon phases are described for possible future synthesis from graphyne without breaking graphyne bonds. While measurements and theory indicate that the reacting graphyne becomes nonplanar because of sheet wrinkling produced by dimensional mismatch between reacted and nonreacted sheet regions, sheet planarity is regained when the reaction is complete. Although the observed elimination of triple bonds to make parallel

SUBMITTER: Aliev AE 

PROVIDER: S-EPMC11804621 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature