This thesis research uses 0.45 urn octahedral AgBr emulsion to study chemically produced silver clusters. Reduction sensitization has been carried out with DMAB, SnCk, and NaOH. The progress of the reaction has been monitored both with sensitometry and diffuse reflectance spectra of the chemically produced silver clusters. The reflection minimum occurs at about 476 nm, independent of reagent. The absorbency by these clusters, derived from the Kubelka-Munk transform, is related to the concentration of the sensitizing agent. Exposure to light causes a decrease in the absorbency by these silver clusters, indicating that some of the silver clusters are hole traps. However, these silver clusters cannot be completely photobleached ~ indicating some of them may be electron traps.
Library of Congress Subject Headings
Photographic sensitometry; Photographic emulsions; Silver halide crystals--Spectra
Department, Program, or Center
Chester F. Carlson Center for Imaging Science (COS)
Guo, Shilin, "Spectroscopic and sensitometric studies of chemically produced silver clusters" (1995). Thesis. Rochester Institute of Technology. Accessed from
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