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Nanoscience

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Title: NANOGWYDDONIAETH Author: Welsh Joint Education Committee Last modified by: Welsh Joint Education Committee Created Date: 7/2/2008 1:58:03 PM – PowerPoint PPT presentation

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Title: Nanoscience


1
Nanoscience
  • Chemistry 1

GCSE Science
Chapter 6
2
What is a nanoparticle?
GCSE Science
Chapter 6
3
Macro..
telescope

GCSE Science
Chapter 6
The universe
4
Macro..
telescope

GCSE Science
Chapter 6
The milky way (our galaxy)
5
Macro..
telescope
GCSE Science
Chapter 6
The Earth (our Planet)
6
Macro..
telescope
GCSE Science
Chapter 6
Wales
7
Macro..
telescope
GCSE Science
Chapter 6
Millennium Stadium
8
Macro..
Eye
2
metre
GCSE Science
Chapter 6
Person
9
Macro..
Eye
20
cm
GCSE Science
Chapter 6
Science textbook
10
Macro..
Eye
2
cm
GCSE Science
Chapter 6
Your finger
11
Macro..
Eye
1
mm
GCSE Science
Chapter 6
Pencil point
12
Micro..
microscope
300
micrometer
GCSE Science
Chapter 6
Flea
13
Micro..
microscope
40
micrometer
GCSE Science
Chapter 6
Human hair
14
Micro..
microscope
GCSE Science
Chapter 6
One blood cell
15
Micro..
microscope
GCSE Science
Chapter 6
One Bacterium E-coli
16
Nano..
Electron microscope
GCSE Science
Chapter 6
One Flu Virus (Influenza)
17
Nano..
Electron microscope
GCSE Science
Chapter 6
Molecule of protein
18
Nano..
Electron microscope
GCSE Science
Chapter 6
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). Its 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 thats
higher). Because it reflects well, its used as a
background for mirrors. Silver salts react to
light, and silver nitrate is used in photographic
film.
GCSE Science
Chapter 6
20
Properties of Nanoparticles
The properties of substances change entirely
when in nano-sized form.
  • Silver (nano)
  • Silver in this form shows different properties
  • Its antibacterial
  • Its antiviral
  • Its antifungal
  • In each of the above examples, the silver
    nanoparticles prevent the organisms 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 athletes foot. Research has shown that
    silver can also be used to treat many diseases,
    from flu to HIV.

GCSE Science
Chapter 6
21
Using Silver Nanoparticles
GCSE Science
Chapter 6
22
Advantages and disadvantages of using
nanoparticles
Disadvantages
Advantages
GCSE Science
Chapter 6
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