Centre d’Élaboration de Matériaux et d’Etudes Structurales (UPR 8011)


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Diamane

Diamanoïds are nanosized sp3 carbon films whose possible occurrence was predicted in 2009 as the result from the hydrogenation of graphene (sp2 carbon) films. They exhibit a tailorable gap in function of the number of layers, which may allow ruling out the intrinsic issue related to graphene, which is a zero-gap material and thereby is useless as such for electronic applications. The combined efforts of the Laboratorio Nanociencias from the PUCMM (Dominican Republic), CEMES and LPCNO (Toulouse), and the University of Manitoba (Canada) have resulted in the successful synthesis of diamanoïds. We have used electron microscopy and Raman spectrometry in our laboratory. We are interested to go further in the study of graphene bi and tri-layers.

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(a) and (b): Model (brown = C ; pink = H) of a portion of a 6-layer diamanoïd/graphene hybrid film (two other L2-L1 layers should be added below L4). (c) The structure of L1 + L2 is that of diamond oriented according to [111]. L3 and L4 are graphenes, but L2 exhibit pending pz orbitals (in yellow in (b)) which strongly interact with L3.

Collaboration with F. Piazza, PUCMM