A planar-sheet nongraphitic zero-bandgap sp <sup>2</sup> 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 sp 2 carbons. The synthesis of this sp 2 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 planar sp 2 carbon sheets likely requires ordered transformation within each sheet, diffraction data for reacted multisheet stacks indicate that the relative lateral positions of neighboring sheets are disordered, as predicted, since no crystalline diffraction peak (other than for the intersheet spacing) is observed.
Article Details
Journal Info
Proceedings of the National Academy of Sciences
National Academy of Sciences
Authors (21)
Ali E. Aliev
Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas
Yongzhe Guo
School of Civil Engineering, Wuhan University
Alexandre F. Fonseca
Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Departamento de Física Aplicada
Joselito M. Razal
Institute for Frontier Materials, Deakin University
Zhong Wang
Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas
Douglas S. Galvão
Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Departamento de Física Aplicada
Claire M. Bolding
Department of Macromolecular Science and Engineering, Case Western Reserve University
Nathaniel E. Chapman-Wilson
Department of Macromolecular Science and Engineering, Case Western Reserve University
Victor G. Desyatkin
Department of Macromolecular Science and Engineering, Case Western Reserve University
Johannes E. Leisen
School of Chemistry and Biochemistry, Georgia Institute of Technology
Luiz A. Ribeiro Junior
Institute of Physics and Computational Materials Laboratory, Institute of Physics, University of Brasília
Guilherme B. Kanegae
Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Departamento de Física Aplicada
Peter Lynch
Institute for Frontier Materials, Deakin University
Jizhen Zhang
Institute for Frontier Materials, Deakin University
Mia A. Judicpa
Institute for Frontier Materials, Deakin University
Aaron M. Parra
Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas
Mengmeng Zhang
Breast Center
Enlai Gao
School of Civil Engineering, Wuhan University
Lifang Hu
Materials Science and Engineering, University of Texas at Dallas
Valentin O. Rodionov
Department of Macromolecular Science and Engineering, Case Western Reserve University
Ray H. Baughman
Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas