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Which nanomaterial is used in sunscreen for UV protection without white residue?
- Carbon Nanotubes
- Zinc Oxide Nanoparticles
- Gold Nanoparticles
- Quantum Dots
Answer: Zinc Oxide Nanoparticles
Nano-ZnO/TiO2 provide broad-spectrum UV protection while being transparent on skin vs micron-sized particles that leave white cast. Safety: coated nanoparticles minimize skin penetration. India regulates nanomaterials in cosmetics. Critical for nanotech applications and consumer safety questions.