Quantitative Characterization of Pore Corrugation in Ordered Mesoporous Materials Using Image Analysis of Electron Tomograms
Cedric J. Gommes
Heiner Friedrich
Mariska Wolters
Petra E. de Jongh
Krijn P. de Jong
10.1021/cm803092c.s001
https://acs.figshare.com/articles/media/Quantitative_Characterization_of_Pore_Corrugation_in_Ordered_Mesoporous_Materials_Using_Image_Analysis_of_Electron_Tomograms/2864392
Electron tomography and image analysis are combined to characterize ordered mesoporous silica SBA-15. The morphology of the mesopores with average diameter 6 nm is analyzed in terms of cylinders having variable radii and centers that are statistically centered on the points of a distorted hexagonal lattice. The variations in the mesopore centers and radii add up and result in pore wall corrugation with amplitude of 1.6 nm. The correlation length of the corrugation along the pore axis was found to be 4−5 nm. The amplitude of the corrugation compared well with the 1.9 nm thick microporous corona obtained from X-ray diffraction (XRD). In general, the present approach provides a detailed microscopic 3D model of nanostructured materials that complements macroscopic measurements such as physisorption and XRD.
2009-04-14 00:00:00
Quantitative Characterization
radii
Pore Corrugation
pore wall corrugation
Image Analysis
macroscopic measurements
Electron TomogramsElectron tomography
diameter 6 nm
Mesoporous Materials
correlation length
XRD
1.9 nm
1.6 nm
nanostructured materials
mesopore centers
3 D model
image analysis
SBA
amplitude
pore axis
microporous corona