Takashima Kenji

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Nanoparticles

• Takashima Kenji
• 3O3(25)

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Contents

• Definition of Nanoparticle
• Silver Nanoparticles
• Uses of Silver Nanoparticles
• Medicinal
• Household/Industry
• Nano Gold
• Uses of Nano Gold
• Medicine and Health
• Conclusion
• Web/Journal reference

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Definition of Nanoparticle

• Nano 10-9
• Definition An ultrafine object between 1 and 100
  nanometers, that may vary in properties
  (size-related/chemical related) as their bulk
  component (E.g. nanoparticle of gold may differ
  from particle of bulk gold)
• Uses Medicine, industry, maunufacturing,
  experiments
• Characteristic High surface area to volume ratio

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Silver Nanoparticles

• Size 10nm-100nm
• Chemical formula Ag
• Details Silver nanoparticles are ultra fine
  particles of silver. They are ten to a hundred
  nanometers large, and differ from the bul silver
  as they have different colours such as yellow, as
  opposed to the silver. This is due to plasmon
  absorbance
• Incident light rays create oscillation in free
  electrons on the surface of nanoparticles,
  causing them to absorb electromagnetic radiation,
  creating different colours reflected.

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Uses of Silver Nanoparticles

• Medicine and Health
• Silver has anti-bacterial properties
• Can bind to bacteria molecule
• Chemically change bacteria structure and rupture
  it, eventually killing the cell
• Potential cure for HIV
• Ability to bind to spikes of HIV virus and
  prevent it from latching on to cell. This ensures
  that the HIV virus does not bind to host cells
  and infection can be suppressed
• Sugical insturments/masks
• Wound healing(Antibacterial properties)

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Uses of Silver Nanoparticles

• Household/Industry
• Silver Nano
• Samsung Produced SilverNano, a patented product
  that claims to have silver nanoparticles on
  surfaces of household particles for
  anti-bacterial properties.
• Air purifiers
• Silver nano particles produced by air purifiers
  bind to a binding agent in paint known as alkyd
  resin, which produces toxic free radicals, which
  get transformed by silver nano-particles to
  non-toxic metal nanoparticles.

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Gold Nanoparticles

• Size 100nm
• Chemical formula Au
• Details Gold nanoparticles, known as nano gold
  or colloid gold, is a suspension of
  sub-micrometre-sized particles (10nm or more) in
  a fluiod, usually water. If the particle is less
  than 100nm, a intense red colour is usually
  observed, but if larger, a dirty yellowish colour
  is observed in the supension.
• This may be due to plasmon absorbance
• It is also a semi conductor, in which it has an
  electrical conductivity of that between a
  conductor and an insulator

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Uses of Nano Gold

• Medicine and Health
• Arthiritis in rats and dogs
• Implantation of nano gold in knee of rat and dog
  acts as painkiller
• Drug Delivery
• Gold can be used as outer covering of drugs,
  which metl to release drug payloads when exposed
  to infrared light. Timing of drug release and
  uptake can thus be better controlled
• Alzheimers Disease
• Research done that combination of colloisdal
  gold can microwave radiation can distroy plaque
  and fibrils that build up to cause Alzheimers
  disease.

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Uses of Nano Gold

• Medicine and Health
• Cancer
• Nano gold reflects light very well. Many cancers
  have receptors on their outer layers, in which
  gold nanoparticles can be bound to antibodies
  which attach to the cancer cell receptors, and
  can be viewed under siple white light microscope
  to detect cancer cells by seeing the reflection
  of light.
• Also, ability for gold nano rods to be inserted
  into cancer cell to weaken the cancer and
  eventually kill it poses potential to be cancer
  cure.
• Toxin detection
• Nanoparticles can be coated with sugars to detect
  certain toxins, in which as the nanoparticle
  binds to the toxin the whole solution changes
  colour to indicate the presence of the toxin. The
  device can be sued for portable toxin detection

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Uses of Nano Gold

• Home/Industry
• Stain Glass
• Water purification
• Used in electronics
• Has material compatibility
• Durable
• Reliable material
• Used for touch sensitive screens and also
  potential data storage device use
• Making semiconductor chip work fater with less
  energy by using like and shine of nano gold to
  engineer better semiconductor chips

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Conclusion

• With regard to gold and silver nanoparticles
• Extremely small
• Have medical properties, and can be beneficial to
  mankind
• Has physical and chemical changes form the bulk
  molecule when shrunk to a small size
• Ability of portable usage since the particles are
  very small

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References

• Scientific Journal
• http//pstca.com/silversol/zimag/theory/p322.pdf
• Web Reference
• http//en.wikipedia.org/wiki/Silver_nanoparticles
• http//www.physorg.com/news124376552.html
• http//www.topnews.in/healthcare/content/-2652gold
  -nanoparticles-may-carry-multiple-drugs-treat-canc
  er
• http//news.bbc.co.uk/2/hi/technology/4872188.stm
• http//www.mi2g.com/cgi/mi2g/frameset.php?pageidh
  ttp//www.mi2g.com/cgi/mi2g/press/110210.php
• Video Reference
• http//www.youtube.com/watch?vuyhxRIvw_cY

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Thank you!

• Any Questions?