Nanoparticles

• What are nanoparticles?

  Very tiny particles between 1 and 100 nanometers
• Why can't we see nanoparticles with a light microscope?

  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 benefit their use as catalysts?

  More surface area speeds up chemical 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?

  For their antibacterial properties
• What is a potential use of silver nanoparticles in surgical masks?

  To kill bacteria and reduce infection risk
• What is a concern regarding the effects of nanoparticles on human health?

  Their effects on our bodies are not fully understood
• Why do some people advocate for stricter regulation of nanoparticles?

  To ensure safety and proper labeling
• How do nanoparticles improve the effectiveness of sunscreen?

  They provide better skin coverage against UV rays
• What is an environmental concern related to nanoparticles?

  They may damage the environment when washed away
• What is the diameter range of nanoparticles?

  1 to 100 nanometers
• What happens to the volume and surface area as particles decrease in size?

  Volume decreases more rapidly than surface area
• What is the relationship between nanoparticle size and their application in catalysis?

  Smaller size increases surface area for reactions