High-power splitting of expanded graphite to produce few-layer graphene sheets

Liao, Kaiming; Ding, Wangfeng; Zhao, Bo; Li, Zhaoguo; Song, Fengqi; Qin, Yuyuan; Chen, Taishi; Wan, Jing; Han, Min; Wang, Guanghou; Zhou, Jianfeng

doi:10.1016/j.carbon.2011.03.021

Cited by 27 publications

(18 citation statements)

References 30 publications

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“…Graphene was prepared by exfoliating expanded graphite using high‐power ultrasonication, then transferred onto a microscope grid. Nanopores or nanodots were fabricated in/on the pristine graphene sheets in an image aberration‐corrected TEM (FEI Titan 80–300 at 300 kV) equipped with a heating sample holder (Gatan TM 628).…”

Section: Methodsmentioning

confidence: 99%

Controllable Atomic‐Scale Sculpting and Deposition of Carbon Nanostructures on Graphene

Xie

Yin

et al. 2014

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Section: Methodsmentioning

confidence: 99%

Controllable Atomic‐Scale Sculpting and Deposition of Carbon Nanostructures on Graphene

Xie

Yin

et al. 2014

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“…Graphene was prepared by exfoliating expanded graphite using high‐powered ultrasonication,25 then it was transferred onto a hole in the carbon‐coated TEM copper grid. The thickness of the graphene sheets was determined by imaging a folded edge of the nanopores,19, 20 which mostly ranges from 2 to 25 layers (0.7–8.5 nm).…”

Section: Methodsmentioning

confidence: 99%

Size‐Dependent Evolution of Graphene Nanopores Under Thermal Excitation

Yin

Xie

et al. 2012

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Graphene nanopores expand when pore diameter is larger than membrane thickness after heat treatment; otherwise, nanopore size shrinks. Such size-dependent evolutionary mechanism of nanopores is considered as thermal-induced migration of uncombined carbon atoms. The amount of carbon adatoms determines the extent of diameter change. This could provide an applicable strategy for nanopore fabrication.

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“…In this context, graphitic carbon materials confined into a two-dimensional nanometric scale represent an extremely important class of technological materials. The interesting chemical and physical properties of low-dimensional graphites (Liao et al, 2011), as well as the capability of modulating such properties by tailoring at the nanoscale the shape and size of the carbon structures (Hernandez et al, 2008), have led to the exploration of a number of potential applications of such light, stiff and flexible materials. Among the applications, two-dimensional C atoms have been proposed as building block components for nanoelectromechanical systems and as conducting channels in complementary metal-oxide-semiconductor nano-electronic devices (Rü mmeli et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Characterization of carbon structures produced by graphene self-assembly

et al. 2014

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Low-dimensional carbon-based materials, in particular two-dimensional graphenic carbon structures, have been produced from single-walled carbon nanotube disruption using high-shear mixing and/or treatments in sulfonitric acid mixtures at both room and high temperature. Among other two-dimensional graphenic carbon structures, colloidal dispersions of graphenic nanoflakes have been obtained. Different structural arrangements, resulting from the reorganization of carbon because of the disruption procedures applied, were observed through selected area electron diffraction (SAED) and through reflection high-energy electron diffraction (RHEED) analyses coupled to transmission and scanning electron microscopy observations. Such combined investigations in the real and reciprocal space provided structural information at the nanoscale on the clustering of graphene layers in nanoplatelets or/and on their assembly into highly ordered (single-crystal) nanosheets. Furthermore, a different carbon phase exhibiting an orthorhombic cell with Cmma symmetry has been detected by SAED and RHEED analyses. In addition, a variety of self-assemblies of hexagonal basal planes have been observed to occur as the result of their different rotational and/or translational stacking faults. Overall, the reported results contribute to define the conditions for a controlled self-assembly of graphene-based structures with tailored dimensions, which is an important technological challenge, as their structure at the nanoscale dramatically affects their electrical properties

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High-power splitting of expanded graphite to produce few-layer graphene sheets

Cited by 27 publications

References 30 publications

Controllable Atomic‐Scale Sculpting and Deposition of Carbon Nanostructures on Graphene

Controllable Atomic‐Scale Sculpting and Deposition of Carbon Nanostructures on Graphene

Size‐Dependent Evolution of Graphene Nanopores Under Thermal Excitation

Characterization of carbon structures produced by graphene self-assembly

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