Nanoparticles

• What are nanoparticles?

  Nanoparticles are very tiny particles, typically 1-100 nanometers across.
• How many atoms do nanoparticles typically contain?

  Nanoparticles contain roughly a few hundred atoms.
• What are fullerenes?

  Fullerenes are a type of nanoparticle that includes tiny hollow carbon tubes called nanotubes.
• Why are carbon nanotubes considered very strong?

  Carbon nanotubes are very strong due to their covalent bonds.
• How do the properties of nanoparticles differ from their bulk chemical counterparts?

  A nanoparticle has very different properties from the bulk chemical it is made from.
• What is the formula for calculating the surface area to volume ratio?

  Surface area to volume ratio = surface area ÷ volume.
• How does the surface area to volume ratio change as particles decrease in size?

  As particles decrease in size, their surface area to volume ratio increases.
• Why do nanoparticles have different properties from larger particles?

  Nanoparticles have a much greater proportion of their atoms available to interact with substances.
• What is nanoscience and its applications?

  • Nanoscience involves the use of nanoparticles.
  • Applications include:
  • Catalysts due to high surface area to volume ratio.
  • New cosmetics like sun creams and deodorants.
  • Nanomedicine for drug delivery.
  • Lubricant coatings to reduce friction.
  • Conductive nanotubes for electric circuits.
  • Strengthening plastics in sports equipment.
  • Antibacterial properties in surgical masks and dressings.
• How do nanoparticles improve cosmetics like sun creams?

  Nanoparticles in cosmetics do their job without leaving white marks on the skin.
• What is the potential benefit of using fullerenes in nanomedicine?

  Tiny fullerenes can be absorbed more easily by the body, allowing for targeted drug delivery.
• How do new lubricant coatings using fullerenes function?

  These coatings reduce friction similar to tiny ball bearings.
• What is one use of nanotubes in technology?

  Nanotubes can be used in tiny electric circuits for computer chips.
• How do nanoparticles enhance the properties of plastics in sports equipment?

  Nanoparticles make the plastic much stronger and more durable without adding much mass.
• What antibacterial properties do silver nanoparticles provide?

  Silver nanoparticles give polymer fibers used in surgical masks and wound dressings antibacterial properties.
• Why is it important to test new nanoparticle products thoroughly?

  It is important to minimize the risks associated with their effects on the body, which aren't fully understood.
• What concerns do people have regarding products containing nanoparticles?

  People are worried that these products have been made available before investigating possible harmful effects on health.