Ask a Scientist – Nano expert: Karen Wooley

The video discusses the use of nanotechnology in sunscreens, focusing on nanoparticles like titanium dioxide and zinc oxide. These particles enhance sunscreen effectiveness by scattering and absorbing light. Despite potential risks, such as photocatalytic activity, these are mitigated by coating the particles and ensuring they do not penetrate the skin deeply.

What new insight or understanding did you gain from this video?