1. Nanoscience
Chemistry 1
GCSE Science

2. What is a nanoparticle? GCSE Science
One million nanoparticles placed side by side would span 1mm.
GCSE Science

3. Macro…..
telescope
Billion light years 93
GCSE Science
The universe

4. Macro….. The milky way (our galaxy) GCSE Science telescope 100
thousand light years
100
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The milky way
(our galaxy)

5. Macro…..
telescope
thousand km 13
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The Earth
(our Planet)

6. Macro…..
telescope km
320
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Wales

7. Macro…..
telescope
metre
150
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Millennium Stadium

8. Macro…..
Eye 2
metre
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Person

9. Macro…..
Eye 20 cm
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Science textbook

10. Macro…..
Eye 2 cm
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Your finger

11. Macro…..
Eye 1 mm
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Pencil point

12. Micro…..
microscope
300
micrometer
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Flea

13. Micro…..
microscope 40
micrometer
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Human hair

14. Micro…..
microscope
micrometer 20
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One blood cell

15. Micro…..
microscope
micrometer 4
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One Bacterium E-coli

16. One Flu Virus (Influenza)
Nano…..
Electron microscope
nanometre
400
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One Flu Virus (Influenza)

17. Nano….. Molecule of protein GCSE Science Electron microscope 40
nanometre 40
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Molecule of protein

18. Nano….. Molecule of Carbon 60 GCSE Science Electron microscope 1
nanometre 1
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Molecule of Carbon 60

19. Properties of Nanoparticles
The properties of substances
change entirely when in nano-sized
form.
Silver (macro)
Silver is a ductile and malleable metal (slightly harder than gold). It’s white with a metallic sheen capable of high shine. It has the highest electrical conductivity of any metal, even copper, and so is used to coat high quality electrodes/ electronic connections.
Pure silver also has the highest heat conductivity of all metals (diamond is the only non-metal that’s higher).
Because it reflects well, it’s used as a background for mirrors. Silver salts react to light, and silver nitrate is used in photographic film.
silver
e.g.
GCSE Science

20. Properties of Nanoparticles
The properties of substances
change entirely when in nano-sized
form.
Silver (nano)
Silver in this form shows different properties:
It’s antibacterial
It’s antiviral
It’s antifungal
In each of the above examples, the silver nanoparticles prevent the organism’s respiratory enzymes from working, and so kills them in minutes.
Special socks are now available that include silver nanoparticles in order to heal conditions such as athlete’s foot. Research has shown that silver can also be used to treat many diseases, from flu to HIV.
GCSE Science

21. Using Silver Nanoparticles
The silver nanoparticles in this sock kills odour causing bacteria and keep the socks fresh!
Coating the inside of the fridge with silver nanoparticles ensures that any microbe is killed and keeps the fridge clean hygienic and safe.
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Nanoparticles in the washing machine ensure that the clothes are cleaned and disinfected.

22. Advantages and disadvantages of using nanoparticles
Could penetrate skin
and cause undesired
side-effects
Some have
antibacterial,
antiviral
and antifungal properties
Easily released
into the
environment
Preparation of
certain catalysts
Nanoparticles
Unusual properties,
leading to new uses
There is a lot that we
don’t know about
nanoparticles at the
moment. Much more
research is needed
before their use becomes
widespread
GCSE Science