Rayleigh like scattering from silica�?�titania core-shell particles and their application in protection against harmful ultraviolet rays

Bulletin of materials science

Sudipta G Dastidar¹  P Bharath¹  Arindam Roy¹ 

[1] Unilever Research and Development, Whitefield, Bangalore 560 066, India$$Unilever Research and Development, Whitefield, Bangalore 560 066, IndiaUnilever Research and Development, Whitefield, Bangalore 560 066, India$$

关键词: Nanoparticles;    Rayleigh scattering;    transmittance;    ultraviolet ray;    sunscreen.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In this article we report experimental and theoretical results of angle-dependent laser light scattering of nano titanium dioxide nucleated on silica particles. It was observed that the experimental scattering profile from nano-titania coated silica (TCS) particle resembles that of a Rayleigh scattering. It can be inferred from the light scattering profile that nucleating fine particles onto a surface of a bigger particle (core), the resulting scattering profile is dominated by the smaller particles. Thin film transmittance measurement of TCS particles also supports this claim. The theoretical scattering predictions do not match with the experimental findings and the reasons for the discrepancies are addressed. This Rayleigh-like scattering property of TCS particles can be used in cosmetic formulations as a replacement for nanoparticles to provide protection from harmful ultraviolet rays. This study helps to provide insights into these systems for their potential usage in cosmetics.

【 授权许可】

Unknown