title: Multiple ionic-plasmon resonances in naturally occurring multiwall nanotubes: infrared spectra of chrysotile asbestos.
abstract: Chrysotile asbestos is formed by densely packed bundles of multiwall hollow nanotubes. Each wall in the nanotubes is a cylindrically wrapped layer of Mg(3)Si(2)O(5)(OH)(4). We show by experiment and theory that the infrared spectra of chrysotile present multiple ionic-plasmon resonances in the Si-O stretching bands. These collective charge excitations are universal features of the nanotubes that are obtained by cylindrically wrapping an anisotropic material. The multiple plasmons can be observed if the width of the resonances is sufficiently small as in chrysotile.
authors.affiliation: Laboratoire de Minéralogie Cristallographie, Case 115, 4 Place Jussieu, 75252 Paris Cedex 05, France.
authors.forename: Etienne
authors.initials: E
authors.lastname: Balan
authors.forename: Francesco
authors.initials: F
authors.lastname: Mauri
authors.forename: Céline
authors.initials: C
authors.lastname: Lemaire
authors.forename: Christian
authors.initials: C
authors.lastname: Brouder
authors.forename: François
authors.initials: F
authors.lastname: Guyot
authors.forename: A Marco
authors.initials: AM
authors.lastname: Saitta
authors.forename: Bertrand
authors.initials: B
authors.lastname: Devouard
mesh_terms: D017632:Asbestos, Serpentine / Q000737:chemistry*; D008854:Microscopy, Electron; D008956:Models, Chemical; D036103:Nanotechnology; D010316:Particle Size; D013055:Spectrophotometry, Infrared; D020349:Surface Plasmon Resonance
chemical_list: D017632:Asbestos, Serpentine