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DOE OSTI · 1896843

Nanoscale insights into the structure of solution-processed graphene by x-ray scattering

Yan, Zhengyu (ORCID:0000000225438207)·Guimarey, María J. G. (ORCID:0000000304834136)·Parvez, Khaled (ORCID:0000000328519907)·Dun, Chaochao (ORCID:0000000232156478)·Read, Oliver (ORCID:0000000197716096)·Forrest, Thomas·Urban, Jeffrey J. (ORCID:0000000349092869)·Abdelkader, Amor·Casiraghi, Cinzia (ORCID:0000000171850377)·Mirihanage, Wajira (ORCID:000000029083269X)
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Abstract

Abstract Chemical exfoliation is an attractive approach for the synthesis of graphene due to its low cost and simplicity. However, challenges still remain in the characterization of solution-processed graphene, in particular with atomic resolution. Through this work we demonstrate the x-ray pair distribution function as a novel approach to study solution-processed graphene or other 2D materials with atomic resolution, directly in solution, produced by liquid-phase and electrochemical exfoliations. The results show the disappearance of long-range atomic correlations, in both cases, confirming the production of single and few-layer graphene. In addition, a considerable ring distortion has been observed as compared to graphite, irrespective of the solvent used: the normal surface angle to the sheet of the powder sample should be less than 6°, compatible with ripples formation observed in suspended graphene. We attribute this effect to the interaction of solvent molecules with the graphene nanosheets.

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36 MATERIALS SCIENCESolution-processed grapheneX-ray Pair Distribution Functionatomic structure

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Yan, Zhengyu (ORCID:0000000225438207), Guimarey, María J. G. (ORCID:0000000304834136), Parvez, Khaled (ORCID:0000000328519907), Dun, Chaochao (ORCID:0000000232156478), Read, Oliver (ORCID:0000000197716096), Forrest, Thomas, Urban, Jeffrey J. (ORCID:0000000349092869), Abdelkader, Amor, Casiraghi, Cinzia (ORCID:0000000171850377), Mirihanage, Wajira (ORCID:000000029083269X). 2022-11-03. Nanoscale insights into the structure of solution-processed graphene by x-ray scattering. https://doi.org/10.1088/2053-1583%2Fac9b6f

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36 MATERIALS SCIENCE↗