Title
The influence of the precipitation method on defect formation in multishell AgBrI (111) tabular crystals.The influence of the precipitation method on defect formation in multishell AgBrI (111) tabular crystals.
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Electron microscopy for materials research (EMAT)
Publication type
conferenceObject
Publication
Springfield :Soc Imaging Science & Technology, [*]
Subject
Physics
Engineering sciences. Technology
Source (book)
International Symposium on Silver Halide Imaging, Sept. 11-14, 2000, St. Adele, Canada
ISBN
0-89208-229-1
ISI
000183315900046
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
Multishell tabular grains have a higher speed than pure AgBr tabular grains. Usually the shells differ in size and iodide content, but also the precipitation method for the iodide containing shells has an influence on the iodide incorporation. A TEM investigation was performed to determine the defect structure of multishell AgBr (111) tabular crystals containing a shell with a low iodide concentration and one with a high iodide concentration. The twins that induce tabular growth and stacking fault contrast in the region of the iodide shells have been observed, similar to previously studied AgBr/Ag(Br,I) coreshell crystals. Moreover in some of the crystals dislocations have been observed, sometimes even an entire network. The number of dislocations formed varies for the different methods of iodide addition. Also variations in average thickness between the different iodide addition methods have been observed. A higher number of dislocations and thicker crystals point towards a higher local concentration of iodide. These observations allow deciding which iodide incorporation method is most useful for a preferred dislocation pattern.
E-info
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Handle