title: Optimal accelerating voltage for HRTEM imaging of zeolite.
abstract: The electron irradiation damage of MFI-type zeolite was estimated under various accelerating voltages of 100, 200 and 300 kV from successively captured high-resolution transmission electron microscopy (HRTEM) images. To determine the optimal accelerating voltage for HRTEM imaging of electron-sensitive MFI zeolite, the critical dose was estimated from the disappearance of a specific fast Fourier transform spot calculated from experimental images. Based only on the electron dose, a higher voltage was more advantageous. However, taking into account the minimum dose for imaging with a CCD camera, the optimal accelerating voltage for imaging MFI zeolite was 200 kV. The minimum dose for image detection with a CCD camera was surmised from the output/input signal ratio dependence on the accelerating voltage and the contrast range in simulated HRTEM images.
authors.affiliation: Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587, Japan. kaname_yoshida@jfcc.or.jp
authors.forename: Kaname
authors.initials: K
authors.lastname: Yoshida
authors.forename: Yukichi
authors.initials: Y
authors.lastname: Sasaki
mesh_terms: D005583:Fourier Analysis; D007091:Image Processing, Computer-Assisted; D046529:Microscopy, Electron, Transmission / Q000379:methods*; D011830:Radiation Effects; D017641:Zeolites / Q000032:analysis*
chemical_list: D017641:Zeolites