Takashima Kenji 3O3(25) Nanoparticles. Contents Definition of Nanoparticle Silver Nanoparticles Uses...
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Transcript of Takashima Kenji 3O3(25) Nanoparticles. Contents Definition of Nanoparticle Silver Nanoparticles Uses...
Takashima Kenji3O3(25)
Nanoparticles
ContentsDefinition of NanoparticleSilver NanoparticlesUses of Silver Nanoparticles
MedicinalHousehold/Industry
Nano GoldUses of Nano Gold
Medicine and HealthConclusionWeb/Journal reference
Definition of NanoparticleNano: 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
Silver NanoparticlesSize: 10nm-100nmChemical formula: AgDetails: 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.
Uses of Silver NanoparticlesMedicine and Health
Silver has anti-bacterial propertiesCan bind to bacteria moleculeChemically change bacteria structure and rupture it,
eventually killing the cellPotential 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/masksWound healing(Antibacterial properties)
Uses of Silver NanoparticlesHousehold/Industry
Silver NanoSamsung Produced SilverNano, a patented product
that claims to have silver nanoparticles on surfaces of household particles for anti-bacterial properties.
Air purifiersSilver 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.
Gold NanoparticlesSize: 100nm+Chemical formula: AuDetails: 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
Uses of Nano GoldMedicine and Health
Arthiritis in rats and dogsImplantation of nano gold in knee of rat and dog acts as
painkillerDrug 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
Alzheimer’s DiseaseResearch done that combination of colloisdal gold can
microwave radiation can distroy plaque and fibrils that build up to cause Alzheimer’s disease.
Uses of Nano GoldMedicine and Health
CancerNano 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 detectionNanoparticles 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
Uses of Nano GoldHome/Industry
Stain GlassWater purificationUsed in electronics
Has material compatibilityDurableReliable materialUsed for touch sensitive screens and also potential
data storage device useMaking semiconductor chip work fater with less
energy by using like and shine of nano gold to engineer better semiconductor chips
ConclusionWith regard to gold and silver
nanoparticles:Extremely smallHave medical properties, and can be
beneficial to mankindHas physical and chemical changes form the
bulk molecule when shrunk to a small sizeAbility of portable usage since the particles
are very small
ReferencesScientific Journalhttp://pstca.com/silversol/zimag/theory/p322.pdfWeb Referencehttp://en.wikipedia.org/wiki/Silver_nanoparticleshttp://www.physorg.com/news124376552.htmlhttp://www.topnews.in/healthcare/content/-2652
gold-nanoparticles-may-carry-multiple-drugs-treat-cancer
http://news.bbc.co.uk/2/hi/technology/4872188.stm
http://www.mi2g.com/cgi/mi2g/frameset.php?pageid=http://www.mi2g.com/cgi/mi2g/press/110210.php
Video Referencehttp://www.youtube.com/watch?v=uyhxRIvw_cY
Any Questions?
Thank you!