title: Direct imaging of surface topology and pore system of ordered mesoporous silica (MCM-41, SBA-15, and KIT-6) and nanocast metal oxides by high resolution scanning electron microscopy.
abstract: We report here a detailed study on the surface topology of well-known ordered mesoporous silica (SBA-15, MCM-41, and KIT-6) and a series of nanocast Co 3O 4, Co 3O 4/CoFe 2O 4 composites by high resolution scanning electron microscopy (HR-SEM). Images of the MCM-41 structure were obtained at a resolution of the pore size, as well as a real space image of the gyroid silica surface of KIT-6 for two different aging temperatures, clearly revealing the differences of the aging procedures. By using the low voltage HR-SEM technique with extremely high resolution, we could very clearly show the influence of the template properties on the structure of the nanocast metal oxides.
authors.affiliation: MPI für Kohlenforschung Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany.
authors.forename: Harun
authors.initials: H
authors.lastname: Tüysüz
authors.forename: Christian W
authors.initials: CW
authors.lastname: Lehmann
authors.forename: Hans
authors.initials: H
authors.lastname: Bongard
authors.forename: Bernd
authors.initials: B
authors.lastname: Tesche
authors.forename: Roland
authors.initials: R
authors.lastname: Schmidt
authors.forename: Ferdi
authors.initials: F
authors.lastname: Schüth