nano-science 2

8/14/2019 Nano-Science 2

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What isWhat is

thisthis

object?object?


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Newly-enabled flexible andtransparent materials

Devices become self-cleaning and self-preserving

Transparent electronicsBuilt-in solar absorption

Integrated sensors allow us

to learn more about theenvironment around us.

Flexible & Changing Design

The Morph concept
http://www.nokia.com/


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Nokia Morph Phone

iphone would have

nothing on thisphone!


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Nano-Science

Buckmisterfullerene


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What is nanoscience?

2. A nanometer (nm) is 1,000,000,000(1 billion) times smaller than a meter

4. Nano-science is the study of particlesthat have the size of 1 to100nm

Your finger nails grew a nm whilereading this!


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Imagine a nanoparticle was the

size of a football.

A chicken would

be the size of earth

A flea would be

the size of Bradford.

A virus would be the same size as a human!


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Why are we interested in nano-science?

Nano-sized particles can produce new

properties in materials, the reason for the

change in properties isnt fully understood

by scientists.
http://upload.wikimedia.org/wikipedia/commons/e/ec/Atomic_resolution_Au100.JPG


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Nano-scienceToday We are going to look over nano-science in

more detail

By the lesson we will know

- Some examples of nano-science in the world today

- Some examples of what could be the future

-The potential risks and drawbacks associated with

nano-science (next lesson)


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Nano-science

Nano-sized silver particles have

antibacterial, antiviral and antifungal

properties.

Where could these be used?


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Antibacterial

Some fridges have thenano-sized silver in thecoating inside fridges.

This will kill bacteriawhich can cause food

poisoning

Some socks havebeen developed

with the silver in to

help people who

suffer from athletes

foot


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Nano-sized silicon dioxide is very strong andlight, this makes it ideal for body armour inthe army.

N.B. Silicon dioxide is also sand!

It is also Quartz!

What else could it be used for?
http://en.wikipedia.org/wiki/Image:Towering_Sand_Dunes.jpg


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Tennis and golf are leading the way, with nano-composite-enhanced rackets and clubs. Andthis year, nanotechnology made it onto the

winner's podium.

Roger Federer won Wimbledon using a racketreinforced with nano-sized


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Nano-sized zinc oxide absorb and reflect UV

light while being transparent to visible

light.

Why is this useful? Where could be use

this?


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THE BEACH!!!

We use it in sunglasses UV light

damages our eyes!

UV light can cause

skin cancer, so weu use it in sun lotion!


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Fororagainst Read the statements on your

desks.

Put the statements into 2 pilesWhich ones are for

nanotechnology and which onesare against?


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The fear is that uncontrolled nano-machines

could run rampant, making unwanted

changes. Instead of curing cancer, theymight turn healthy cells into cancer.

Instead of repairing broken machinery,

they might change everything intofeatureless, gray goo.


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People may try to turn nano-machines into

weapons. These tiny machines could be made

to destroy buildings and machines, turn food intopoison, irradiate water supplies, cut power lines,

or simply kill people. No standard defence

against these nano-weapons would be effective,

so nano-countermeasures would need to bedeveloped. Nano-science is too dangerous to be

turned to destructive purposes.


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Perhaps the most dangerous risk of nano-

science is one that is not yet fully

understood. Because nano-science issuch a new field, there may be unforeseen

risks that have not yet been fully explored.

It is essential that the world treats nano-science with the utmost respect and care.


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Possibilities down the road might include

food wrappers that can detect bacterial

contamination, smart bandages andmilitary uniforms that can mend

themselves and adapt to conditions


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The medical potential of nanotechnologies ishuge. Already on the market in the USA

are wound dressings that exploit the

antimicrobial properties of nanocrystallinesilver.


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Nanopants Probably the most visible nanotech productsto date are the stain and wrinkle-resistant trousers.

Nanopants are garments whose fabric has been treated

with a product containing polymer chains to improvetheir resistance to staining. Quite simply, hydrophobicbits of the chain will arrange themselves away from thetextile surface, presenting a water and stain-resistantsurface to the outside world.

If you happen to spill coffee or orange juice on yournanopants the liquid simply beads off and fallsharmlessly to the floor, rather than leaving a stubbornstain.


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Take a deep breath...

A possible route of exposure is through thelungs, if people breathe in nanoparticles

present in the atmosphere. Again, very little isknown about how nanoparticles behave in ourlungs, but it is clear that they can be taken upby cells in the lung, triggering inflammation.

They can also get into the bloodstream, andtransport of nanoparticles through nervetissue to the brain has also been seen.


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Despite the potential for nano-clean-up, one of the

biggest fears is the possibility ofenvironmental damage.

Given their small size, the worry is that nanoparticles

will easily become airborne and spread through theatmosphere, or will contaminate aquatic environments.

Once in the environment, they could accumulate in

living organisms, as many harmful substances do,

or damage ecosystems.

Very little is known about the fate of nanoparticles in the

environment, or their impact on living systems. Some

preliminary research suggests that carbon nanoparticles

buckyballs can harm fish.


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The cosmetics industry has invested heavily innanotechnology.

New products are claimed to penetrate deeper

into the skin or to have other benefits.For example, cosmetics that slowly release

vitamins are in development.

Nano-titanium dioxide and zinc oxide can absorb

and reflect UV light, while also beingtransparent to visible light. They are alreadyused in sunscreens.
http://upload.wikimedia.org/wikipedia/commons/e/ec/Atomic_resolution_Au100.JPG


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http://upload.wikimedia.org/wikipedia/commons/e/ec/Atomic_resolution_Au100.JPGhttp://upload.wikimedia.org/wikipedia/commons/e/ec/Atomic_resolution_Au100.JPG


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A

B

C

D

E


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