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Proceedings Paper

Efficiency of TiO2 nanoparticles of different sizes as UV-B light skin-protective fraction in sunscreens
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Paper Abstract

One of the acute problems of raising the life standard of people nowadays is to protect human skin against harmful UV solar radiation. The aim of this paper is to evaluate the most appropriate size of titanium dioxide (TiO2) fine particles that can be imbedded into the skin in order to achieve the maximal attenuation of the UV-B light. The in-depth distribution in the skin of TiO2 particles achieved with the topically applied sunscreens is determined experimentally by the tape-stripping technique. Computer code implementing the Monte Carlo method is used to simulate photon migration through a 20-μm thick horny layer matrix partially filled with nano-sized TiO2 spheres. Dependencies of the portions of the most harmful UV radiation with the wavelength of 290.5 nm absorbed by and reflected from, as well as transmitted through the horny layer on the concentration of TiO2 particles are obtained and analyzed.

Paper Details

Date Published: 22 June 2005
PDF: 8 pages
Proc. SPIE 5771, Saratov Fall Meeting 2004: Optical Technologies in Biophysics and Medicine VI, (22 June 2005); doi: 10.1117/12.634664
Show Author Affiliations
Alexey P. Popov, M.V. Lomonosov Moscow State Univ. (Russia)
Univ. of Oulu (Finland)
Alexander V. Priezzhev, M.V. Lomonosov Moscow State Univ. (Russia)
J. Lademann, Charite, Humboldt Univ. Berlin (Germany)
Risto Myllyla, Univ. of Oulu (Finland)

Published in SPIE Proceedings Vol. 5771:
Saratov Fall Meeting 2004: Optical Technologies in Biophysics and Medicine VI
Valery V. Tuchin, Editor(s)

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