Ultrathin carbon support films for high-resolution electron Microscopy of nanoparticles

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We introduce a simple preparation method for ultrathin carbon support films that is especially useful for high-resolution electron microscopy (HREM) of nanoparticles. Oxidized iron nanoparticles were used as a test sample in a demonstration of this method. The film qualities are discussed on the basis of electron - energy-loss spectroscopy (EELS) and image analysis techniques such as thickness maps and histograms. We carried out a comparison between the homemade and commercial film qualities. The relative thickness of the homemade support films was 0.6 times less than that of the commercial films, which was calculated from the EELS analysis, whereas the thicknesses of both carbon support films varied within about 3%. The percentage of the observable area was about 67 +/- 7.6% of the support film. This was about twice as large as the commercial film (32 +/- 9.3%). The HREM image of the sample prepared with our support film improved 9% in brightness and 15% in contrast compared with images obtained with the commercial support.
Publisher
CAMBRIDGE UNIV PRESS
Issue Date
2007-08
Language
English
Article Type
Article
Keywords

BIOLOGICAL SPECIMENS; AMORPHOUS-CARBON; HOLEY FILMS; GRIDS

Citation

MICROSCOPY AND MICROANALYSIS, v.13, no.4, pp.285 - 290

ISSN
1431-9276
DOI
10.1017/S1431927607070250
URI
http://hdl.handle.net/10203/88569
Appears in Collection
MS-Journal Papers(저널논문)
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