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Paredes G, Wang R, Puech P, Seine G, Leyssale JM, Arenal R, Masseboeuf A, Piazza F, Monthioux M. Texture, Nanotexture, and Structure of Carbon Nanotube-Supported Carbon Cones. ACS NANO 2022; 16:9287-9296. [PMID: 35695474 DOI: 10.1021/acsnano.2c01825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Graphene-based carbon micro-/nano-cones were prepared by depositing pyrolytic carbon onto individual carbon nanotubes as supports using a specific chemical vapor deposition process. They were investigated by means of high-resolution scanning electron microscopy, low-voltage aberration-corrected transmission electron microscopy, Raman spectroscopy, and molecular dynamics modeling. While the graphenes were confirmed to be perfect, the cone texture was determined to be preferably scroll-like, with the scroll turns being parallel to the cone axis. Correspondingly, many of the concentrically displayed graphenes (actually scroll turns) exhibit the same helicity vector. When radii of curvature are large enough, this could allow for coherent stacking to locally take place in spite of the lattice shift induced by the curvature. A particular care was taken on investigating the cone apexes, in which a specific type of graphene termination was observed, here designated as the "zip" defect. Calculations determined a plausible stable structure that such a defect type may correspond to. This defect was found to generate a very low Raman ID/ID' band ratio (1.5), for which physical reasons are proposed. Combining our results and that of the literature allowed proposing an identification chart for a variety of defects able to affect the graphene lattice or edges.
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Affiliation(s)
- Germercy Paredes
- Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES), UPR8011 CNRS, Université Toulouse III, 31055 Toulouse, France
- Laboratorio de Nanociencia, Pontificia Universidad Católica Madre y Maestra, Santiago de Los Caballeros 51000, Dominican Republic
| | - Rongrong Wang
- Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES), UPR8011 CNRS, Université Toulouse III, 31055 Toulouse, France
- Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018 Zaragoza, Spain
| | - Pascal Puech
- Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES), UPR8011 CNRS, Université Toulouse III, 31055 Toulouse, France
| | - Grégory Seine
- Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES), UPR8011 CNRS, Université Toulouse III, 31055 Toulouse, France
| | - Jean-Marc Leyssale
- Université deBordeaux, CNRS, Bordeaux INP, Institut des Sciences Moléculaires (ISM), UMR 5255, F-33400 Talence, France
| | - Raul Arenal
- Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Fundación ARAID, 50018 Zaragoza, Spain
- Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Aurélien Masseboeuf
- Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES), UPR8011 CNRS, Université Toulouse III, 31055 Toulouse, France
| | - Fabrice Piazza
- Laboratorio de Nanociencia, Pontificia Universidad Católica Madre y Maestra, Santiago de Los Caballeros 51000, Dominican Republic
| | - Marc Monthioux
- Centre d'Elaboration des Matériaux et d'Etudes Structurales (CEMES), UPR8011 CNRS, Université Toulouse III, 31055 Toulouse, France
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BARTOLI F, PHILIPPY R, PORTAL JM, GERARD B. Poorly ordered hydrous Fe oxides, colloidal dispersion and soil aggregation. I. Effect of humic macromolecules on surface and colloidal properties of Fe (III) polycations. ACTA ACUST UNITED AC 2006. [DOI: 10.1111/j.1365-2389.1992.tb00119.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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