Early use of PbS nanotechnology for an ancient hair dyeing formula |
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| Authors: | Walter Philippe Welcomme Eléonore Hallégot Philippe Zaluzec Nestor J Deeb Christopher Castaing Jacques Veyssière Patrick Bréniaux René Lévêque Jean-Luc Tsoucaris Georges |
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| Affiliation: | Centre de Recherche et de Restauration des Musées de France CNRS UMR171,14 quai Fran?ois Mitterrand, 75001 Paris, France. philippe.walter@culture.gouv.fr |
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| Abstract: | Lead-based chemistry was initiated in ancient Egypt for cosmetic preparation more than 4000 years ago. Here, we study a hair-dyeing recipe using lead salts described in text since Greco-Roman times. We report direct evidence about the shape and distribution of PbS nanocrystals that form within the hair during blackening. It is remarkable that the composition and supramolecular organization of keratins can control PbS nanocrystal growth inside a hair. |
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