TY - JOUR
T1 - Quantitative HRTEM study of zeolite
AU - Ohnishi, N.
AU - Ohsuna, T.
AU - Sakamoto, Y.
AU - Terasaki, O.
AU - Hiraga, K.
N1 - Funding Information:
The authors acknowledge Dr. Y. Okamoto for providing specimens of the zeolite MoQ’Na-FAU. The work has been supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture of Japan, and by the CREST (Core Research for Evolutional Science and Technology) project of the Japan Science and Technology Corporation.
PY - 1998/5
Y1 - 1998/5
N2 - We demonstrate the application of a new technique of high-resolution transmission electron microscopy (HRTEM) study, which is assisted by a quantitative measurement of electron diffraction intensities using a slow-scan CCD camera, to the structure analysis of zeolite frameworks as well as materials incorporated in their micropores. A Fourier analysis of electron diffraction intensities, combined with crystallographic phase information derived from an observed HRTEM image, indicated individual projected T-atom positions of the MFI zeolite framework, with a resolution higher than the original HRTEM image. A Fourier map obtained from electron diffraction intensities of a Na-FAU zeolite containing MoS2 clusters clearly revealed additional potential distributions inside the supercages, compared with the original Na-FAU without MoS2. The kinematical diffraction approximation can be reasonably applied for the analysis, resulting in framework atom positions of these zeolites and location of incorporated materials with a resolution of fine details around 1 Å.
AB - We demonstrate the application of a new technique of high-resolution transmission electron microscopy (HRTEM) study, which is assisted by a quantitative measurement of electron diffraction intensities using a slow-scan CCD camera, to the structure analysis of zeolite frameworks as well as materials incorporated in their micropores. A Fourier analysis of electron diffraction intensities, combined with crystallographic phase information derived from an observed HRTEM image, indicated individual projected T-atom positions of the MFI zeolite framework, with a resolution higher than the original HRTEM image. A Fourier map obtained from electron diffraction intensities of a Na-FAU zeolite containing MoS2 clusters clearly revealed additional potential distributions inside the supercages, compared with the original Na-FAU without MoS2. The kinematical diffraction approximation can be reasonably applied for the analysis, resulting in framework atom positions of these zeolites and location of incorporated materials with a resolution of fine details around 1 Å.
KW - Crystal structure analysis
KW - Electron crystallography
KW - Electron diffraction
KW - High-resolution electron microscopy
KW - Zeolite
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U2 - 10.1016/S1387-1811(98)00026-2
DO - 10.1016/S1387-1811(98)00026-2
M3 - Article
AN - SCOPUS:0032066416
VL - 21
SP - 581
EP - 588
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 4-6
ER -