Nanoparticals

• What are nanoparticles defined as in terms of their size?

  Particles with a diameter between one nanometer and 100 nanometers
• Why can't nanoparticles be seen with a light microscope?

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

  Nanoscience
• What is a key feature of nanoparticles regarding their surface area and volume?

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

  Because volume decreases more rapidly than surface area
• How does the surface area of nanoparticles affect their use as catalysts?


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

  They can be used to deliver drugs directly to cells
• What are fullerenes made of?

  Carbon atoms
• What potential use do nanoparticles have in electronics?

  They can be used to create tiny electrical circuits
• What property of silver nanoparticles is utilized in medical applications?

  Antibacterial properties
• How are silver nanoparticles used in surgical masks and wound dressings?

  They are infused to kill bacteria and reduce infection risk
• What is a concern regarding the effects of nanotechnology on human health?

  The effects on our bodies are not fully understood
• What is one regulatory concern regarding nanoparticles?

  They need to be tested more thoroughly
• How do nanoparticles in sunscreen improve skin protection?

  They provide better skin coverage against UV rays
• What is an unknown risk associated with nanoparticles in sunscreen?


  It is unclear if they can enter the body and cause damage
• What is a potential environmental concern regarding nanoparticles?

  They could be damaging the environment when washed into the sea
• What is the main focus of the video discussed in the study material?

  The uses and risks of nanoparticles
• What are the main uses of nanoparticles?

  • Catalysts in chemical reactions
  • Drug delivery in nano medicine
  • Tiny electrical circuits
  • Antibacterial applications (e.g., in surgical masks and wound dressings)
• What are the risks associated with the use of nanoparticles?

  • Effects on human health are not fully understood
  • Need for thorough testing
  • Potential environmental damage
  • Regulatory concerns regarding labeling and safety