Please use this identifier to cite or link to this item: https://doi.org/10.1088/0022-3727/30/11/004
Title: The trapping and distribution of charge in polarized polymethylmethacrylate under electron-beam irradiation
Authors: Song, Z.G.
Gong, H. 
Ong, C.K. 
Issue Date: 7-Jun-1997
Citation: Song, Z.G., Gong, H., Ong, C.K. (1997-06-07). The trapping and distribution of charge in polarized polymethylmethacrylate under electron-beam irradiation. Journal of Physics D: Applied Physics 30 (11) : 1561-1565. ScholarBank@NUS Repository. https://doi.org/10.1088/0022-3727/30/11/004
Abstract: A scanning electron microscope (SEM) mirror-image method (MIM) is employed to investigate the charging behaviour of polarized polymethylmethacrylate (PMMA) under electron-beam irradiation. An ellipsoid is used to model the trapped charge distribution and a fitting method is employed to calculate the total amount of the trapped charge and its distribution parameters. The experimental results reveal that the charging ability decreases with increasing applied electric field, which polarizes the PMMA sample, whereas the trapped charge distribution is elongated along the direction of the applied electric field and increases with increasing applied electric field. The charges are believed to be trapped in some localization states, of activation energy and radius estimated to be about 19.6 meV and 4.6 × 10-8 m, respectively.
Source Title: Journal of Physics D: Applied Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/98326
ISSN: 00223727
DOI: 10.1088/0022-3727/30/11/004
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