ORBi: Gommes Cédric - 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

Reference : 2-Point correlation function of nanostructured materials via the grey-tone correlation f...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/36472

Title :	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
Language :	English
Author, co-author :	Gommes, Cédric [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
	Friedrich, Heiner [Universiteit Utrecht > Inorganic Cemistry and Catalysis > > >]
	De Jongh, Petra E [Universiteit Utrecht > Inorganic Cemistry and Catalysis > > >]
	De Jong, Krijn P [Universiteit Utrecht > Inorganic Cemistry and Catalysis > > >]
Publication date :	2010
Journal title :	Acta Materialia
Publisher :	Elsevier Science
Volume :	58
Pages :	770-780
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	1359-6454
Keywords :	[en] mesoporous materials ; Electron tomography ; Image analysis ; Correlation analysis
Abstract :	[en] 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 to analyze 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 analyzed in terms of a hexagonal array of Gaussian independent pores. The model enables 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.
Research units :	Departement de Chimie Appliquée, ULg
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/36472
Other URL :	http://www.sciencedirect.com/science/journal/13596454

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