Nanoparticles

• What are nanoparticles?

  Very tiny particles between 1 and 100 nanometers
• Why can't light microscopes see nanoparticles?

  Because they are smaller than $0.000000001$ meters
• What is the field of science that studies nanoparticles?

  Nanoscience
• What is a key feature of nanoparticles?

  They have a large surface area to volume ratio
• Why does the surface area to volume ratio increase as particles get smaller?

  Volume decreases faster than surface area
• How does the surface area of nanoparticles affect their use as catalysts?

  More surface area allows for faster reactions
• What is one application of nanoparticles in medicine?

  Delivering drugs directly to cells
• What are fullerenes made of?

  Carbon atoms
• Why are nanoparticles exciting for electrical circuits?

  Some can conduct electricity
• How are silver nanoparticles used in healthcare?

  Infused into surgical masks and dressings
• What is a concern regarding the effects of nanotechnology?

  Its effects on our bodies are not fully understood
• What do some people believe about regulating nanoparticles?

  They should be regulated more strictly
• How do nanoparticles in sunscreen benefit skin protection?

  They provide better skin coverage against UV rays
• What is uncertain about nanoparticles in sunscreen?

  Whether they can enter the body and cause harm
• What happens to nanoparticles when washed into the sea?

  Their environmental impact is unknown
• What is a potential risk of nanoparticles in the environment?

  They could be damaging in some way