Skip to Main content Skip to Navigation
Journal articles

Progress on Diamane and Diamanoid Thin Film Pressureless Synthesis

Abstract : Nanometer-thick and crystalline sp3-bonded carbon sheets are promising new wide band-gap semiconducting materials for electronics, photonics, and medical devices. Diamane was prepared from the exposure of bi-layer graphene to hydrogen radicals produced by the hot-filament process at low pressure and temperature. A sharp sp3-bonded carbon stretching mode was observed in ultraviolet Raman spectra at around 1344–1367 cm−1 while no sp2-bonded carbon peak was simultaneously detected. By replacing bi-layer graphene with few-layer graphene, diamanoid/graphene hybrids were formed from the partial conversion of few-layer graphene, due to the prevalent Bernal stacking sequence. Raman spectroscopy, electron diffraction, and Density Functional Theory calculations show that partial conversion generates twisted bi-layer graphene located at the interface between the upper diamanoid domain and the non-converted graphenic domain underneath. Carbon-hydrogen bonding in the basal plane of hydrogenated few-layer graphene, where carbon is bonded to a single hydrogen over an area of 150 μm2, was directly evidenced by Fourier transform infrared microscopy and the actual full hydrogenation of diamane was supported by first-principle calculations. Those results open the door to large-scale production of diamane, diamanoids, and diamanoid/graphene hybrids.
Document type :
Journal articles
Complete list of metadata
Contributor : Marc Monthioux Connect in order to contact the contributor
Submitted on : Tuesday, November 16, 2021 - 3:24:52 PM
Last modification on : Tuesday, January 4, 2022 - 6:45:31 AM


Publisher files allowed on an open archive


Distributed under a Creative Commons Attribution 4.0 International License



Fabrice Piazza, Marc Monthioux, Pascal Puech, Iann Gerber, Kathleen Gough. Progress on Diamane and Diamanoid Thin Film Pressureless Synthesis. Journal of Carbon Research, MDPI, 2021, 7 (1), pp.9. ⟨10.3390/c7010009⟩. ⟨hal-03431201⟩



Les métriques sont temporairement indisponibles