Reactivity of Fluorographene: A Facile Way toward Graphene Derivatives

Dubecký, Matúš; Otyepková, Eva; Lazar, Petr; Karlický, František; Petr, Martin; Čépe, Klára; Banáš, Pavel; Zbořil, Radek; Otyepka, Michal

doi:10.1021/acs.jpclett.5b00565

Cited by 97 publications

(101 citation statements)

References 36 publications

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“…We argue that defluorination of FG in solvents does not take place via generally considered S N 1 and S N 2 nucleophile substitution reaction, [9] as schematically shown in Figure 2d. This is because substituting one functional group with another would not change the density of sp 3 or sp 2 carbon centers on graphene basal plane, and therefore, leading to no major change in conductivity.…”

Section: Resultsmentioning

confidence: 88%

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Solvent‐Based Soft‐Patterning of Graphene Lateral Heterostructures for Broadband High‐Speed Metal–Semiconductor–Metal Photodetectors

Ali

Shehzad

et al. 2016

Adv Materials Technologies

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Solvents are essential in synthesis, transfer, and device fabrication of 2D materials and their functionalized forms. Controllable tuning of the structure and properties of these materials using common solvents can pave new and exciting pathways to fabricate high-performance devices. However, this is yet to be materialized as solvent effects on 2D materials are far from well understood. Using fluorine functionalized chemical vapor deposited graphene (FG) as an example, and in contrast to traditional "hard-patterning" method of plasma etching, the authors demonstrate a solvent-based "softpatterning" strategy to enable its selective defluorination for the fabrication of graphene-FG lateral heterostructures with resolution down to 50 nm. In this strategy, the oxygen plasma etching process of patterning after graphene transfer is avoided and high quality surfaces are preserved through a physically continuous atomically thin sheet, which is critical for high performance photodetection, especially in the high-speed domain. The fabricated lateral graphene heterostructures are further employed to demonstrate a high speed metal-semiconductor-metal photodetector (<10 ns response time), with a broadband response from deep-UV (200 nm) to near-infrared (1100 nm) range. Thanks to the high quality surface with much less defects due to the "soft-patterning" strategy, the authors achieve a high deep-UV region photoresponsivity as well as the ultrafast time response. The strategy offers a unique and scalable method to realize continuous 2D lateral heterostructures and underscores the significance of inspiring future designs for high speed optoelectronic devices.

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Section: Resultsmentioning

confidence: 88%

“…), graphene can undergo a variety of reactions with solvents, including reduction, [7] elimination, [8] and substitution. [9] Such reactions can significantly alter the structure and properties of the functionalized graphene (FG) through change in nature and degree of functional group coverage.…”

Section: Introductionmentioning

confidence: 99%

Solvent‐Based Soft‐Patterning of Graphene Lateral Heterostructures for Broadband High‐Speed Metal–Semiconductor–Metal Photodetectors

Ali

Shehzad

et al. 2016

Adv Materials Technologies

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“…Because of these properties, fluorinated materials are widely used to create surfaces with high chemical stability, low surface energies, and low adhesiveness [43]. It is worth noting that chemical stability of CF has been recently dethroned by the observed defluorination in alcalic media at ambient conditions [44].…”

Section: Resultsmentioning

confidence: 99%

The surface and structural properties of graphite fluoride

Lazar

Otyepková

Karlický

et al. 2015

Carbon

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“…More recently, new fluorinated graphene derivatives were prepared by the covalent modification of fluorinated graphene 7, 8, 63. Stine et al[[qv: 63a]] fluorinated CVD‐grown graphene sheets followed by covalent modification with ethylenediamine.…”

Section: Propertiesmentioning

confidence: 99%

Two‐Dimensional Fluorinated Graphene: Synthesis, Structures, Properties and Applications

et al. 2016

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Fluorinated graphene, an up‐rising member of the graphene family, combines a two‐dimensional layer‐structure, a wide bandgap, and high stability and attracts significant attention because of its unique nanostructure and carbon–fluorine bonds. Here, we give an extensive review of recent progress on synthetic methods and C–F bonding; additionally, we present the optical, electrical and electronic properties of fluorinated graphene and its electrochemical/biological applications. Fluorinated graphene exhibits various types of C–F bonds (covalent, semi‐ionic, and ionic bonds), tunable F/C ratios, and different configurations controlled by synthetic methods including direct fluorination and exfoliation methods. The relationship between the types/amounts of C–F bonds and specific properties, such as opened bandgap, high thermal and chemical stability, dispersibility, semiconducting/insulating nature, magnetic, self‐lubricating and mechanical properties and thermal conductivity, is discussed comprehensively. By optimizing the C–F bonding character and F/C ratios, fluorinated graphene can be utilized for energy conversion and storage devices, bioapplications, electrochemical sensors and amphiphobicity. Based on current progress, we propose potential problems of fluorinated graphene as well as the future challenge on the synthetic methods and C‐F bonding character. This review will provide guidance for controlling C–F bonds, developing fluorine‐related effects and promoting the application of fluorinated graphene.

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Reactivity of Fluorographene: A Facile Way toward Graphene Derivatives

Cited by 97 publications

References 36 publications

Solvent‐Based Soft‐Patterning of Graphene Lateral Heterostructures for Broadband High‐Speed Metal–Semiconductor–Metal Photodetectors

Solvent‐Based Soft‐Patterning of Graphene Lateral Heterostructures for Broadband High‐Speed Metal–Semiconductor–Metal Photodetectors

The surface and structural properties of graphite fluoride

Two‐Dimensional Fluorinated Graphene: Synthesis, Structures, Properties and Applications

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