Mystery solved: The origin of the colors in the first color photographs

A palette of colors on a silver plate: That is what the world's first color photograph looks like. It was taken by French physicist Edmond Becquerel in 1848. His process was empirical, never explained, and quickly abandoned. Now, a team at the Centre de recherche sur la conservation (CNRS/Muséum National d'Histoire Naturelle/Ministère de la Culture), in collaboration with the SOLEIL synchrotron and the Laboratoire de Physique des Solides (CNRS/Université Paris-Saclay), reports that the colors obtained by Edmond Becquerel were due to the presence of metallic silver nanoparticles. Their study was published on 30 March 2020 in Angewandte Chemie International Edition.

from Phys.org - latest science and technology news stories https://ift.tt/2QZN8Lx

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