Open AccessELECTRON HOLOGRAPHY AND ITS APPLICATION ON OBSERVATION OF MICRO-ELECTROSTATIC FIELD DISTRIBUTION
Author(s) -
Jianwen Chen,
Zhijiang Wang
Publication year - 1993
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.42.1919
Subject(s) - electron holography , electron , holography , spheres , electron microscope , field (mathematics) , radius , dielectric , electrostatics , cathode ray , atomic physics , materials science , physics , electric field , point particle , optics , molecular physics , classical mechanics , optoelectronics , quantum mechanics , mathematics , computer security , astronomy , computer science , pure mathematics
Principle of electron holography and a new method for producing the electrostatio field specimen are presented. Some dielectric particles supported by a thin carbon film, for example, polystarene latex spheres, 0.31 m in diameter, will become a charged body during the observation in electron microscope because of electrostatic accumulation. Obviously, under the electron beam, the spheres of radius r, acquire a stationary positive charge Q and the resulting field can be simply modelled by that of point charge Q. With the field model, the electrostatic field distribution were observed and the sizes of the charged objects are determined by electron holography.