Slide 1
Title Slide
What is Nanoscience?
As a Partner of Trinity College. NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant
#1003574. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 2
Nano in my life film 1 – introduction to
nano science. Click on the video or
follow the youtube link http://www.youtube.com/user/tcdnan
oscience#p/a/556DA4E9D467F799/
0/9PRSzkqFLEs
Module 1 – What is Nanoscience?
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 3
e.g. A human fingernail grows 1
nanometre every second, the fact
that you don’t see your nails growing
shoes how small a nanometre is.
•
A human fingernail grows 1
nanometre every second.
•
A man’s beard grows 5
nanometres every second.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 4
Nano means small... very small
It is a million times smaller than the smallest
measurement you can see on your ruler!
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 5
Let’s put things in perspective
A strand of your hair is about 0.1
A One
common
of your
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blood
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cells is30
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wide;isthat’s
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just 2100,000
nm wide.
10,000 nanometres
nm tall.
wide.
metres.
How small does something need to be
before it is considered nano? Click to
reveal next picture.
Virus image: health.howstuffworks.com
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can go smaller.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 6
Converting meters into nanometers
So a nanometre is…
0.000000001 metres
OR
1 nm
It is the unit we use to measure the building
blocks of everything.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 7
We are making nanomaterials in labs
•
This is a silver nanowire resting on a human hair.
Look at a strand of your own hair and imagine how small that is…
This slide shows a picture of a silver
nanowire resting on a human hair, the
nanowire would not be visible with the
naked eye.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 8
Nano facts!
•
The word “nano” comes from the
Greek word, meaning Dwarf.
•
Nanoscience includes Biology,
Chemistry, Physics and
Engineering.
•
Nanoscience is about
understanding how small
materials behave.
•
“Father of Nanoscience” - Richard
Feynman, an American physicist.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 9
Nanoscience
The study and manipulation of
materials at the nanoscale.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
We’re going to look at two areas
nanoscience and nanotechnology. In
this slide we have the definition of
what nanoscience is, in essence the
science of the very small.
Slide 10
Which of these is Gold?
Click to reveal the answer explanation
on the next slide
They both are!
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 11
So why do they look different?
•
At the nanoscale, strange things happen to materials - their
properties can change.
•
Different
thicknesses of
materials reflect and
absorb light
differently.
•
The colour of gold
can range from
purple to red
depending on the
size of the particles.
The colour materials reflect and absorb
light depends on the size of the
molecule.
Image:
http://www.nano.uts.edu.au/pics/au_
atoms.jpg
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 12
Zinc particles in sun cream
•
•
Large Zinc Oxide particles appear white.
Nano-scale ZnO particles appear clear.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Here a comparison is made between
large and nano size zinc oxide particles–
– particles typically found in sunscreen.
Image:
http://www.nanosense.org/activities/
sizematters/properties/SM_Lesson3
Teacher.pdf
Slide 13
Chemical properties
•
Chemical properties of
materials can also
change at the nanoscale.
•
This is due to surface
area.
•
The greater the surface
area, the more a
substance will react as
more of the material is
exposed.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 14
The three-part graphic on the slide
illustrates how, for the same volume,
you can increase surface area simply by
cutting. Each of the three blocks has
the same total volume, but the block
that has the most cuts has a far greater
amount of surfaces area.
Teacher activity: Experiment one.
Images:
http://www.nanosense.org/activities/
sizematters/properties/SM_Lesson3
Teacher.pdf
Here is a definition of nanotechnology.
Nanotechnology
The development of materials
and devices at the nano-scale.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 15
Why should we build small things?
Brainstorm:
Why is small good?
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Why is small good? Suggested
answers on the next slide
Slide 16
Why is small good?
•
Faster
•
Lighter
•
Can get into small spaces
•
Cheaper
•
More energy efficient
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 17
How do you build small things?
•
“Top-down”– building something by starting with a larger component
and carving away material (e.g. like a sculpture).
•
In nanotechnology, patterning and etching away of material is used in
building chips for computers.
There are a number of potential
advantages to nano-enabled devices.
Information can move faster through
thin wires.
If things are smaller they will be lighter
and can be utilised in smaller spaces.
Smaller materials tend to be cheaper to
make.
They also generally more energy
efficent as they weigh less and require
less energy to run.
Nanomaterials can be manufactured
using a focussed beam of ions that can
cut away materials with atomic
precision.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 18
•
“Bottom-up”– building something by assembling smaller components
(e.g. like building a car engine or Lego).
•
In nanotechnology, the self-assembly of atoms and molecules is used
in making nanowires from metals like silver, or carbon nanotubes.
Silver nanowires.
Carbon nanotubes.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Nanoscience uses self assembly which
is the arranging of particles into an
ordered system.
Slide 19
Potential impacts of nanotechnology
Health:
Diagnostics, Cancer treatment and
targeted drug delivery.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 20
Potential impacts of nanotechnology
Materials:
Sports industry, cosmetics,
clothing and space elevators.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
The following slides are covered in
more detail in the individual modules.
The pictures here show a stent used to
keep arteries open made of carbon.
A artists representation of a lab on a
chip which would allow quick diagnosis
with a single drop of blood.
Magnetic nanoparticles being used in
the treatment and diagnosis of
illnesses.
Waterproof clothing such as rain jackets
use nanoscience to create the
waterproofing.
Nanoparticles are also used in
cosmetics such as sunscreen and anti
wrinkle creams.
Carbon fibre nanoparticles are used in
sports equipment.
In the future scientists are hoping to
develop a space elevator to orbiting
stations.
Image:
http://science.nasa.gov/sciencenews/science-atnasa/2005/27jul_nanotech
Slide 21
Potential impacts of nanotechnology
Technology:
Faster processing, morphing computers
and smaller, more powerful mobile
devices.
Nanotechnology is helping to develop
smaller, faster and more powerful
computers.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 22
Potential impacts of nanotechnology
Environment
Cleaner energy, better energy
storage and treatment of water.
Nanotechnology is helping to develop
more efficient ways of capturing energy
from sustainable sources like the sun. It
is also being used to develop more
effective methods of treating water.
Image : http://www.exposolar.org
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Slide 23
Summary
•
How big is a nanometre?
•
Nanoscience is about understanding how
materials behave at the nanoscale.
•
Properties of materials are different at the
nanoscale compared to bulk materials.
•
Nanotechnology is about applying our
understanding of materials to make new products
and improve existing ones.
As a Partner of Trinity College NEATEC is authorized to use and distribute this module to Non-Profit Organizations. This project is sponsored in part by the National Science Foundation under Grant #1003574. Any
opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflectthose of the National Science Foundation.
Conclusion.