The electronic properties of non-conventional α-graphyne nanoribbons

Abstract

Graphyne nanocarbons are composed of a mixture of sp and sp2 hybridized atoms in different ratios and distributions. In addition to pure hexagonal systems, non-conventional graphynic structures can also accommodate...

Novel carbon allotropes in all-sp2 bonding networks: self-assembling design and first-principles calculations

“…The cohesion energy of H6 1 -carbon and H6 2 -carbon was À9.51 eV and À8.99 eV, respectively, which were lower than that of the graphyne nanocarbons. 30 The ambient-pressure enthalpy of H6 1 -carbon and H6 2 -carbon were lower than that of the biphenylene 31 and graphenylenes 32 which are within the cohesion energy range of armchair GNRs (AGNRs) already synthesized in the laboratory, indicating their thermodynamic feasibility and synthesis possibilities. To date, plenty of as-designed carbon allotropes have been synthesized by various experimental techniques, such as the synthesis of cyclo [18] carbons by atom manipulation coupling between molecules to be induced, which also may have been applicable to the synthesis of these two proposed carbyneconnected carbons.…”

“…[24][25][26][27][28][29] Graphene nanocarbon shows tunable and excellent electrical properties with different ratios and distributions of sp and sp 2 hybridized atoms. 30 Twodimensional biphenylenes consisting of tetragonal, hexagonal and octagonal carbon rings can provide multiple adsorption sites for Na ions, making it a potential material for highperformance sodium ion battery anodes. 31 Graphenylene, a graphene allotrope, also shows great potential as an anode material for lithium-ion batteries.…”

Graphyne and graphdiyne nanoribbons: from their structures and properties to potential applications

“…The mechanical properties of GFMs are also of great concern to scientists. [123][124][125][126][127][128] Compared with graphene, the addition of acetylene bonds in GDY reduces the bond number and plane density of the GDY structure, thus reducing the stiffness of the GDY material. The in-plane Young's modulus (162 N m À1 ) of GDY is relatively low, and the Poisson's ratio is relatively high (0.429).…”

Theoretical investigation of width effects in the electronic and transport properties of carbon nanoribbons with 5-8-5 carbon rings: a first-principles study

“…Different from graphene, this carbon allotrope presents a negative Poisson ratio, which suggests applications in the field of auxetic materials. 19,20 Besides the interest in 2D carbon materials, several works have also been investigating the properties of carbon nanoribbons, 21,22 mainly for applications in nanoelectronics. [23][24][25] Such materials are interesting because they have a large range of modification methods that can be implemented to tune their properties [26][27][28] and consequently their device behavior and applications.…”