Controlled Formation of Sharp Zigzag and Armchair Edges in Graphitic Nanoribbons

Jia, Xiaoting; Hofmann, Mario; Meunier, Vincent; Sumpter, Bobby G.; Campos-Delgado, Jessica; Romo-Herrera, J. M.; Son, Hyungbin; Hsieh, Ya‐Ping; Reina, Alfonso; Kong, Jing; Terrones, Mauricio; Dresselhaus, M. S.

doi:10.1126/science.1166862

Cited by 675 publications

(592 citation statements)

References 28 publications

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“…Zigzag and armchair are two main types of edges along the crystallographic directions in graphene. In recent years, extensive studies were carried out to investigate the relative stability of these two edge orientations and the edge orientation-dependent physics for mechanically exfoliated monolayer graphene flakes [72–74], epitaxial graphene islands [75–77], CVD derived graphene grains [78], and graphene nanoribbons (GNRs) [79–81]. …”

Section: The Structure Of Graphenementioning

confidence: 99%

“…(Z: zigzag; A: armchair) [78]. (f) A modified HRTEM image of overlapping zigzag-armchair edges; the HRTEM image is originally from Ref [79], and the modified version is from Ref [111] (reused with permissions from [78] Copyright © 2011, Springer Nature, [79] Copyright © 2009, American Association for the Advancement of Science, and [111] Copyright © 2010 Elsevier Ltd.). …”

Section: The Structure Of Graphenementioning

confidence: 99%

“…steps [97], twins [98], and trenches [99]), and directly partial growth on germanium(001) [100]. The lattice of GNR shows both zigzag and armchair edge orientations which can be observed by using AFM [101] and STM [79,100]. Figure 6(f) illustrates a modified high-resolution TEM (HRTEM) image of overlapping zigzag-armchair edges.…”

Section: The Structure Of Graphenementioning

confidence: 99%

See 2 more Smart Citations

Structure of graphene and its disorders: a review

Gao

Lee

et al. 2018

Science and Technology of Advanced Materials

533

187

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Monolayer graphene exhibits extraordinary properties owing to the unique, regular arrangement of atoms in it. However, graphene is usually modified for specific applications, which introduces disorder. This article presents details of graphene structure, including sp2 hybridization, critical parameters of the unit cell, formation of σ and π bonds, electronic band structure, edge orientations, and the number and stacking order of graphene layers. We also discuss topics related to the creation and configuration of disorders in graphene, such as corrugations, topological defects, vacancies, adatoms and sp3-defects. The effects of these disorders on the electrical, thermal, chemical and mechanical properties of graphene are analyzed subsequently. Finally, we review previous work on the modulation of structural defects in graphene for specific applications.

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Section: The Structure Of Graphenementioning

confidence: 99%

Section: The Structure Of Graphenementioning

confidence: 99%

Section: The Structure Of Graphenementioning

confidence: 99%

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Structure of graphene and its disorders: a review

Gao

Lee

et al. 2018

Science and Technology of Advanced Materials

533

187

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“…These are two most seen edge structures after Joule heating of graphene 187. The chiral‐GNR (CGNR) is composed by a combination of armchair and zigzag sites.…”

Section: Looking Beyond Catalysts: Edges Of Graphenementioning

confidence: 99%

Face the Edges: Catalytic Active Sites of Nanomaterials

Wang

2015

Advanced Science

158

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Edges are special sites in nanomaterials. The atoms residing on the edges have different environments compared to those in other parts of a nanomaterial and, therefore, they may have different properties. Here, recent progress in nanomaterial fields is summarized from the viewpoint of the edges. Typically, edge sites in MoS2 or metals, other than surface atoms, can perform as active centers for catalytic reactions, so the method to enhance performance lies in the optimization of the edge structures. The edges of multicomponent interfaces present even more possibilities to enhance the activities of nanomaterials. Nanoframes and ultrathin nanowires have similarities to conventional edges of nanoparticles, the application of which as catalysts can help to reduce the use of costly materials. Looking beyond this, the edge structures of graphene are also essential for their properties. In short, the edge structure can influence many properties of materials.

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“…[31][32][33][34][35][36] A comprehensive review on the properties and synthesis of GNRs has been reported elsewhere. [ 37 ] Jia et al [ 38 ] noted that when using Joule heating and high electron irradiation, the most stable edges in graphene ribbons are either zigzag or armchair edges. At present, it is important to device GNRs and GNPs exhibiting sharp and crystalline edges so that specifi c polymer reactions could be controlled.…”

Section: Structure and Physico-chemical Properties Of Graphenementioning

confidence: 99%

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

et al. 2011

Self Cite

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Graphene constitutes a two dimensional sp2 hybridized carbon material with outstanding electrical and mechanical properties. To date, novel methods for producing large quantities of graphene and its derivatives (doped or functionalized graphenes, nanoribbons and nanoplatelets) are emerging, and research dedicated to the fabrication of polymer nanocomposites using graphenes has started. In this Research News, we summarize the synthesis and properties of graphene and its derivatives, and provide an overview of the latest research dedicated to the fabrication of polymer composites for different applications, including mechanical, electrical, optical and thermal. Some of the recently fabricated composites exhibit outstanding properties, however, it is vital to understand the chemistry and physics of the interphases established between the polymer and the graphene surfaces. The challenges in the fabrication of super robust and highly conducting composites using graphenes are also discussed. It is believed that graphene‐based polymer composites will result in commercial products if their interphases and reactivity are carefully controlled.

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Controlled Formation of Sharp Zigzag and Armchair Edges in Graphitic Nanoribbons

Cited by 675 publications

References 28 publications

Structure of graphene and its disorders: a review

Structure of graphene and its disorders: a review

Face the Edges: Catalytic Active Sites of Nanomaterials

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

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