Nanoscience

• A nanometer(nm) is 1 billion times smaller than a meter
• Nanoscience


  The study of particles that have the size 1 to 100nm
• nano-particles have a small volume for a large surface area
• Properties of Nano-silver

  • Antibacterial
  • Anti-fungal
  • Antiviral
• Uses of Nano-silver

  • Hand sanitiser - kills microbes and prevents sickness
  • Fridge inside coating - kills bacteria and prevents food poisoning
  • Socks - kills bacteria and stops smells
• Nano titanium dioxide 


  blocks harmful UV rays whilst remaining transparent
• Uses for Nano titanium dioxide

  • Sunscreen - protects from sunburn without being visible on the skin
  • Self-cleaning windows - speeds up the breakdown of dirt in the presence of UV light and cause any water to spread out in a thin film
• Concerns

  • Long-term effects are unknown
  • Easily absorbed
  • Could cause cancer
  • Could affect the brain
  • Can be inhaled - affects lungs