Synthesis and properties of annulenic subunits of graphyne and graphdiyne nanoarchitectures

Haley, Michael M.

doi:10.1351/pac200880030519

Cited by 398 publications

(294 citation statements)

References 120 publications

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“…1 can be assumed to be chemically stable. Indeed, finite building blocks and cutouts have already been synthesized [22,23,[25][26][27][28][29][30], and first steps towards the preparation of extended graphynes and graphdiynes have been proposed and developed [22,24,26,27]. Future synthesis of graphyne materials might involve the use of surfaces as support and templates in approaches related to the recently reported synthesis of graphene on metal surfaces by chemical vapor deposition of organic precursor molecules [12][13][14][15][16][17][18].…”

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confidence: 99%

Competition for Graphene: Graphynes with Direction-Dependent Dirac Cones

et al. 2012

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The existence of Dirac cones in the band structure of two-dimensional materials accompanied by unprecedented electronic properties is considered to be a unique feature of graphene related to its hexagonal symmetry. Here, we present other two-dimensional carbon materials, graphynes, that also possess Dirac cones according to first-principles electronic structure calculations. One of these materials, 6,6,12-graphyne, does not have hexagonal symmetry and features two self-doped nonequivalent distorted Dirac cones suggesting electronic properties even more amazing than that of graphene.

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Competition for Graphene: Graphynes with Direction-Dependent Dirac Cones

et al. 2012

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“…[25][26][27][28][29] Subsequent studies suggest that these materials have attractive electronic properties. [29][30][31][32][33][34][35] L. D. Pan et al reported that graphyne nanoribbons are semiconductors with band gaps similar to silicon.…”

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Ferromagnetism and perfect spin filtering in transition-metal-doped graphyne nanoribbons

Pan

Zhang

et al. 2015

Phys. Rev. B

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“…1). Indeed, assembled subunits of several graphyne structures [26][27][28] and another similar graphene allotrope including triple-bonded carbon linkages, so-called graphdiyne films and nanoribbons have already been synthesized. 29,30 Theoretical calculations have shown that these lowdimensional structures have unique mechanical, 24,[31][32][33] thermal, 34,35 optical, 36 and particularly electrical [37][38][39][40][41][42] properties as peculiar as those of graphene.…”

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Electronic, phononic, and thermoelectric properties of graphyne sheets

Sevinçli

Sevik

2014

Appl. Phys. Lett.

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Electron, phonon, and thermoelectric transport properties of a-, b-, c-, and 6,6,12-graphyne sheets are compared and contrasted with those of graphene. a-, b-, and 6,6,12-graphynes, with direction dependent Dirac dispersions, have higher electronic transmittance than graphene. c-graphyne also attains better electrical conduction than graphene except at its band gap. Vibrationally, graphene conducts heat much more efficiently than graphynes, a behavior beyond an atomic density differences explanation. Seebeck coefficients of the considered Dirac materials are similar but thermoelectric power factors decrease with increasing effective speeds of light. c-graphyne yields the highest thermoelectric efficiency with a thermoelectric figure of merit as high as ZT ¼ 0.45, almost an order of magnitude higher than that of graphene. V C 2014 AIP Publishing LLC.[http://dx.doi.org/10.1063/1.4902920] Graphene and its functionalized forms have many extraordinary physical properties, such as robustness, stability, flexibility, very high thermal, and electrical conductivities, 1-8 which inspired numerous studies exploring the possibilities for adapting them for technological applications in the fields of not only electronics, photonics, and optoelectronics, 9-11 but also thermoelectrics and thermal management of nano-devices. 8,[12][13][14][15][16][17][18] Recently, it was shown that other two-dimensional materials can also be stable and that they widen the potential of two-dimensional materials for applications. [19][20][21][22] Of particular importance are graphene-like carbon allotropes, called graphyne structures composed of one-atom-thick sheets of carbon atoms but containing sp carbon bonds in addition to sp 2 hybridized bonds 23-25 (see Fig. 1). Indeed, assembled subunits of several graphyne structures 26-28 and another similar graphene allotrope including triple-bonded carbon linkages, so-called graphdiyne films and nanoribbons have already been synthesized. 29,30 Theoretical calculations have shown that these lowdimensional structures have unique mechanical, 24,31-33 thermal, 34,35 optical, 36 and particularly electrical [37][38][39][40][41][42] properties as peculiar as those of graphene. For instance, 6,6,12-graphyne, exhibit direction-dependent conductivity due to its electronic structure possessing two self-doped nonequivalent distorted Dirac cones. 38 On the other hand, c-graphyne has a direct energy band gap, 43,44 which is appealing for electronic applications. 45 Considering that one of the most important concerns about graphene is the difficulty to manipulate its electronic conduction due to absence of a band gap, c-graphyne was argued to be more suitable for electronics. 46 More recently, thermoelectric properties of graphynes were reported to have interesting features. 35,47,48 Yet, the potential of graphynes for applications require further investigations.In this work, electronic, phononic, and thermoelectric transport properties of four types of graphyne structures, namely, a-, b-, c-, and 6,6,12-graphynes,...

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Synthesis and properties of annulenic subunits of graphyne and graphdiyne nanoarchitectures

Abstract: This report describes the synthetic strategies toward and optoelectronic properties of substructures of the non-natural, planar carbon networks graphyne and graphdiyne, which are based on the dehydrobenzo[12]annulene and dehydrobenzo[18]annulene framework, respectively.

Cited by 398 publications

References 120 publications

Competition for Graphene: Graphynes with Direction-Dependent Dirac Cones

Competition for Graphene: Graphynes with Direction-Dependent Dirac Cones

Ferromagnetism and perfect spin filtering in transition-metal-doped graphyne nanoribbons

Electronic, phononic, and thermoelectric properties of graphyne sheets

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