Nanoparticles

• What is the size range of nanoparticles?

  1 to 100 nm
• How do nanoparticles differ from larger particles in terms of surface area?

  They have a higher surface area to volume ratio
• Why are nanoparticles more reactive than larger particles?

  More atoms are in contact with reactants
• What are some applications of nanoparticles?

  • Silver nanoparticles kill bacteria in socks
  • Iron oxide nanoparticles remove arsenic from water
  • Zinc oxide nanoparticles protect against UV rays in sunscreens
• What is nanotechnology?

  The use of nanoparticles to improve lives
• What happens to the properties of substances as their particle size decreases?

  Properties can change significantly at smaller sizes
• What potential future use of nanoparticles is mentioned?

  Delivering medicines to tumors
• What is a potential risk of nanoparticles?

  They may cause health problems
• Why might nanoparticles pose health risks?

  They can pass through cell membranes
• What is currently unknown about nanoparticles?

  The exact long-term health risks
• What are the advantages and disadvantages of using nanoparticles?

  Advantages:

  • Increased reactivity
  • Unique properties at small sizes
  • Versatile applications in various fields

  
  

  Disadvantages:

  • Potential health risks
  • Environmental concerns
  • Unknown long-term effects