Janus Multipods with a Titanium Dioxide (TiO<sub>2</sub>) Core: UV-Protective Pickering Emulsifier for Sunscreens
발표자
()
초록
내용
In this study, we present Janus multipod nanoparticles that simultaneously block UV while offering enhanced emulsion stability. Janus multipods consist of multiple SiO2 nanopods which are grown on a spherical TiO2 core with a thin SiO2 shell using sol-gel method. The incorporation of TiO2 in the core was shown to effectively block UV due to high refractive index while the presence of the SiO2 shell suppresses the photocatalytic activity. By utilizing wax colloidosomes as templates, these pod nanoparticles were modified to exhibit Janus characteristics. This leads to strong and irreversible adsorption of Janus particles on the oil/water (O/W) interface where the pod nature of the particle additionally contributes to interfacial stabilization by steric effect. As these particles offer UV blocking and high emulsion stability, we envision that Janus multipods would have great potential in cosmetic applications which demand better sunscreen and skincare formulations.