Chapter

Processes for Photographic Sensitivity

Tadaaki Tani

in Photographic Science

Published in print August 2011 | ISBN: 9780199572953
Published online January 2012 | e-ISBN: 9780191731266 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199572953.003.0004
Processes for Photographic Sensitivity

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The formation mechanisms and performance of Ag clusters (latent image centers) on AgX grains are described as reference for those of metal nanoparticles. On exposure to light, an electron and an interstitial silver ion alternately contribute to the nucleation and growth of one Ag cluster on each grain. On reduction, many Ag dimers are formed at surface kink sites on each grain and grow to nanoparticles when the sites are saturated. The Ag clusters thus formed are characterized in terms of their size, light absorption, and magnetism. Descriptions are made on chemical sensitization, stabilization, and development of AgX emulsions.

Keywords: Ag cluster; Ag nanoparticles; latent image centers; chemical sensitization; stabilization; development

Chapter.  19625 words.  Illustrated.

Subjects: Atomic, Molecular, and Optical Physics

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