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6. How does it change us? 5. How does it change? 7. How do we change it? ... Molecular precision (solar cells, light emitting diodes) Nanoscale machines (none yet) ... – PowerPoint PPT presentation

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Title: You are here


1
You are here
2
The Scale of Things Nanometers and More
Things Natural
Things Manmade
1 cm 10 mm
10-2 m
Head of a pin 1-2 mm
The Challenge
1,000,000 nanometers
10-3 m
1 millimeter (mm)
MicroElectroMechanical (MEMS) devices 10 -100 mm
wide
Microwave
0.1 mm 100 mm
10-4 m
Human hair 60-120 mm wide
Microworld
0.01 mm 10 mm
10-5 m
Pollen grain
Red blood cells
Infrared
Red blood cells with white cell 2-5 mm
Zone plate x-ray lens Outer ring spacing 35 nm
1,000 nanometers
10-6 m
1 micrometer (mm)
Visible
Fabricate and combine nanoscale building blocks
to make useful devices, e.g., a photosynthetic
reaction center with integral semiconductor
storage.
0.1 mm 100 nm
10-7 m
Ultraviolet
Self-assembled, Nature-inspired structure Many
10s of nm
Nanoworld
0.01 mm 10 nm
10-8 m
10 nm diameter
Nanotube electrode
ATP synthase
1 nanometer (nm)
10-9 m
Carbon buckyball 1 nm diameter
Soft x-ray
Carbon nanotube 1.3 nm diameter
DNA 2-1/2 nm diameter
10-10 m
0.1 nm
Quantum corral of 48 iron atoms on copper
surface positioned one at a time with an STM
tip Corral diameter 14 nm
Atoms of silicon spacing tenths of nm
Office of Basic Energy Sciences Office of
Science, U.S. DOE Version 10-07-03, pmd
3
4 stages of response to any new revolutionary
development
  • (1) Its crazy!
  • (2) It may be possibleso what?
  • (3) I said it was a good idea all along.
  • (4) I thought of it first.
  • Arthur C. Clarke

4
What is nanotechnology?
  • Nanopowders and nanomaterials (pants, sunscreen)
  • Molecular precision (solar cells, light emitting
    diodes)
  • Nanoscale machines (none yet)
  • Matter compilers (read Diamond Age)
  • Self-replicating robots (read Prey)

5
Nanopowders nanomaterials
Grain size 1 100 nm (usually in all 3
dimensions) Surface area matters nano-particle
gold is red, not yellow Applications paint,
insulation, magnets, video displays Used gt
millennium, but understood lt 50 years
Terminal velocity 1 m sphere of water 738
mph 0.1 mm sphere of water 0.6 mph
Maya Blue
6
Molecular precision
  • Placing individual molecules (or even atoms)
    where we want them.
  • Placing an atom where you want it is very
    slow (e.g. STM to place xenon atoms, A pound of
    carbon has 2.3 x 1025 atoms)
  • Encouraging atoms can be done on a mass scale

7
Nanoscale machines
8
Matter compilers
  • Theoretical and some say impossible
  • Living cells are special case proof of concept

9
Self-replicating robots
  • Nanobots theoretical, may be impossible
  • Powerful and may not be controllable
  • Use telomeres to prevent cancer?

10
More than You See
Nanobot
Techniques for use
Software
Wireless network
Energy sources
Liability agreements
Maintenance infrastructure
Intellectual property law
Environmental regulations
11
Valuable Information
Consumer products
Matter compilers
Design information
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