Graphene Wrinkles Enable Spatially Defined Chemistry

Abstract

This paper reports a scalable approach to achieve spatially selective graphene functionalization using multiscale wrinkles. Graphene wrinkles were formed by relieving the strain in thermoplastic polystyrene substrates conformally coated with fluoropolymer and graphene skin layers. Chemical reactivity of a fluorination process could be tuned by changing the local curvature of the graphene nanostructures. Patterned areas of graphene nanowrinkles and crumples followed by a single-process plasma reaction resulted in substrates with regions having different fluorination levels. Notably, conductivity of the functionalized graphene nanostructures could be locally tuned as a function of feature size without affecting the mechanical properties.

Recent Advances in Fluorinated Graphene from Synthesis to Applications: Critical Review on Functional Chemistry and Structure Engineering

“…[127] Subsequently, Deng et al took advantage of the multiscale corrugations to achieve the spatially selective fluorination for graphene by using CF 4 plasma (Figure 5D). [92] As mentioned above, the plasma fluorination method is relatively controllable and green, and it is feasible to prepare the FG nanosheets with a special phase structure or heterostructure. Furthermore, carrying out fundamental exploration about the physical properties of individual FG nanosheets prepared through the plasma fluorination will clarify quantitative structure-activity relationship and pave the way for the development of application-oriented advanced FG materials.…”

“…application. [92,93] Notably, the structure engineering is always closely dependent on the progress of fluorination chemistry and corresponding fluorination methods of FG. [33,84,239,240] Liu et al proved that the defect on graphene sheet possessed a higher fluorination reactivity through experiments and DFT calculations.…”

“…Image for “Stress‐induced plasma fluorination”: Reproduced with permission. [ 92 ] Copyright 2019, American Chemical Society. Image for “Microwave fluorination”: Reproduced with permission.…”

“…In addition, the advanced nanotechnology gets involved in recent years, and researchers have focused on the structure engineering of FG, such as pattern of fluorine distribution, [ 92–96 ] which pushes the investigations of FG to a new climax. The elaborated structure engineering of FG is the key factor to optimize the physicochemical performances, by which we could differentiate the specific contributions from different structures of FG to its properties.…”

Transfer‐Enabled Fabrication of Graphene Wrinkle Arrays for Epitaxial Growth of AlN Films

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modify graphene properties, is promising for many applications. [3][4][5][6] In this regard, as an efficient approach to tune surface and optical properties, [3] and to alter the chemical reactivity due to the presence of strong strain, [7][8][9] graphene wrinkle can be formed by the collapsing or the folding of graphene geometrically. [10] Furthermore, free of dangling bonds, graphene is an ideal buffer layer for the epitaxial growth of functional materials, which is, however, strongly hindered by the difficulty of surface nucleation.

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