title: Intershell spacing changes in MWCNT induced by metal-CNT interactions.
abstract: The intershell spacing in different regions of a multi-walled carbon nanotube (MWCNT) was determined by analysis of high resolution transmission electron (HR-TEM) micrographs. Three general effects can be pointed out, (1) the regular intershell spacing of a CNT is bigger than that in a graphitic carbon because the curvature generates geometrical and electronic deformations which increase repulsion forces between the graphene sheets, (2) when an extra curvature appears, e.g. at the tip of a closed CNT or in a bamboo-like structure, the intershell spacing is expanded due to the extra repulsion caused by the combination of pentagonal and heptagonal rings imbibed in the hexagonal lattice, and (3) when a metal particle interacts with a CNT, the intershell spacing is compressed due to strong metal-CNT interactions.
authors.affiliation: Institute of Chemistry, University of Antioquia, A.A. 1226 Medellín, Colombia. jaimegallegomarin@yahoo.es
authors.forename: Jaime
authors.initials: J
authors.lastname: Gallego
authors.forename: Joël
authors.initials: J
authors.lastname: Barrault
authors.forename: Catherine
authors.initials: C
authors.lastname: Batiot-Dupeyrat
authors.forename: Fanor
authors.initials: F
authors.lastname: Mondragon
mesh_terms: D002244:Carbon; D008670:Metals / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*
chemical_list: D008670:Metals; D037742:Nanotubes, Carbon; D002244:Carbon