The role of small silver clusters in photography |
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Authors: | P Fayet F Granzer G Hegenbart E Moisar B Pischel L Wöste |
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Institution: | 1. Ecole Polytechnique Fédérale de Lausanne, Institute de Physique Expérimentale, Lausanne, Switzerland 2. Institut für Angewandte Physik, J.W. Goethe-Universit?t, Frankfurt, Federal Republic of Germany 3. AGFA-GEVAERT AG, Forschung und Entwicklung, Leverkusen, Federal Republic of Germany
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Abstract: | Size-selected silver cluster ions have been produced in a mass spectrometer arrangement and have been deposited onto binder-free AgBr microcrystals. Clusters containing less than four silver atoms did not catalyze development (reduction) of the microcrystals. However, application of clusters containing four or more silver atoms rendered the crystals immediately developable in a conventional photographic developer. This for the first time proves directly, that a so-called latent image speck under these conditions of development requires a minimum number of four silver atoms. |
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