| Titre : | 2-Point correlation function of nanostructured materials via the grey-tone correlation function of electron tomograms : a three-dimensional structural analysis of ordered mesoporous silica |
| Auteurs : | Cedric J. Gommes, Auteur ; Heiner Friedrich, Auteur ; Petra E. de Jongh, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 3, Fevrier 2010) |
| Article en page(s) : | pp. 770-780 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Index. décimale : | 669 (Métallurgie) |
| Tags : | 2-Point correlation Nanostructure Porous material Image analysis Transmission electron microscopy |
| Résumé : |
Electron tomography is a unique technique for imaging the microstructure of materials with a nanometer resolution.
The signal-to-noise ratio of electron tomograms is, however, often too low for a reliable segmentation-based image analysis. We derive a general relation between the grey-tone correlation function of the tomograms and the 2-point correlation function of the morphology, which enables us to analyse quantitatively the grey-tone correlation function with a morphological model of the material. The methodology is applied to SBA-15 ordered mesoporous silica. The three-dimensional grey-tone correlation function obtained from electron tomography is analysed in terms of a hexagonal array of Gaussian independent pores. The model enables us to relate the morphology obtained from the 2-point correlation function to macroscopic characterization data of the material, notably small-angle X-ray scattering and nitrogen adsorption. |
| DEWEY : | 669 |
| ISSN : | 1359-6454 |
| En ligne : | http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%232010%23999419996%231577807%23FLA%23&_cdi=5556&_pubType=J&_auth=y&_acct=C000070790&_version=1&_urlVersion=0&_userid=6909337&md5=952181ad53b74a31dd165bcbdf644bd7 |
