RT Journal Article
T1 Graphite to diamond transition induced by photoelectric absorption of ultraviolet photons
A1 Gómez De Castro, Ana Inés
A1 Rheinstadter, Maikel
A1 Clancy, Patrick
A1 Castilla, Maribel
A1 Isidro, Federico de
A1 Larruquert, Juan, I
A1 De Lis-Sanchez, Tomás
A1 Britten, James
A1 Cabero Piris, Mariona
A1 Isidro Gómez, Federico P. de
AB The phase transition from graphite to diamond is an appealing object of study because of many fundamental and also, practical reasons. The out-of-plane distortions required for the transition are a good tool to understand the collective behaviour of layered materials (graphene, graphite) and the van der Waals forces. As today, two basic processes have been successfully tested to drive this transition: strong shocks and high energy femtolaser excitation. They induce it by increasing either pressure or temperature on graphite. In this work, we report a third method consisting in the irradiation of graphite with ultraviolet photons of energies above 4.4 eV. We show high resolution electron microscopy images of pyrolytic carbon evidencing the dislocation of the superficial graphitic layers after irradiation and the formation of crystallite islands within them. Electron energy loss spectroscopy of the islands show that the sp(2) to sp(3) hybridation transition is a surface effect. High sensitivity X-ray diffraction experiments and Raman spectroscopy confirm the formation of diamond within the islands.
PB Nature publishing group
SN 2045-2322
YR 2021
FD 2021-01-28
LK https://hdl.handle.net/20.500.14352/7984
UL https://hdl.handle.net/20.500.14352/7984
LA eng
NO Gómez De Castro, A. I., Rheinstadter, M., Clancy, P. et al. «Graphite to Diamond Transition Induced by Photoelectric Absorption of Ultraviolet Photons». Scientific Reports, vol. 11, n.o 1, enero de 2021, p. 2492. www.nature.com, https://doi.org/10.1038/s41598-021-81153-3.
NO ©2021 The Author(s)We are indebted to Dr. Santiago Sanchez-Cortes from the Instituto de Estructura de la Materia (Consejo Superior de Investigaciones Cientificas, CSIC-Spain) who kindly offered his lab and assistance to obtain the Raman spectra. We thank Dr. Jacob P.C. Ruff from the Cornell High Energy Synchrotron Source (CHESS) for his assistance with CHESS data. This work is based upon research conducted at the Spanish National Centre for Electron Microscopy and at the Cornell High Energy Synchrotron Source (CHESS) which is supported by the National Science Foundation under award DMR-1332208. Additional support was provided by the Ministry of Science and Education of Spain and the Natural Sciences and Engineering Research Council (NSERC) of Canada, the Canada Foundation for Innovation (CFI) and the Ontario Ministry of Research, Science and Innovation.
DS Docta Complutense
RD 10 abr 2025