Backscattered electron imaging of titanium dioxide in frozen hydrated preparations
Backscattered electron (BSE) imaging was used to study ultrafine TiO2 crystals distribution in a test cream. The cream was fast frozen, cryofractured and observed uncoated at low temperature. The BSE detector was a microchannel plate. The results demonstrate that up-to-date photoprotective preparations can be investigated by this technique.
Hallegot
P
L'Oreal Recherche, Department of Analytical Chemistry, 1 av. Eugene Schueller, BP22, 93601 Aulnay-sous-Bois Cedex, France.