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

Alexey P. Popov; Alexander V. Priezzhev; J. Lademann; Risto Myllyla

doi:10.1117/12.634664

22 June 2005 Efficiency of TiO₂ nanoparticles of different sizes as UV-B light skin-protective fraction in sunscreens

Alexey P. Popov, Alexander V. Priezzhev, J. Lademann, Risto Myllyla

Proceedings Volume 5771, Saratov Fall Meeting 2004: Optical Technologies in Biophysics and Medicine VI; (2005) https://doi.org/10.1117/12.634664
Event: Saratov, Russia, 2004, Saratov, Russian Federation

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.

Citation Download Citation

Alexey P. Popov, Alexander V. Priezzhev, J. Lademann, and Risto Myllyla "Efficiency of TiO₂ nanoparticles of different sizes as UV-B light skin-protective fraction in sunscreens", Proc. SPIE 5771, Saratov Fall Meeting 2004: Optical Technologies in Biophysics and Medicine VI, (22 June 2005); https://doi.org/10.1117/12.634664

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