Transcript How does nanotechnology change?

8. What are
its costs &
benefits?
You are here
5. How does
it change?
1. What is it?
9. How do we
evaluate it?
6. How does
it change us?
2. Why do we
use it?
7. How do we
change it?
3. Where
does it come
from?
0. Introduction
4. How does
it work?
How does nanotechnology change?
• Disappearing technology
Nano-Tex pants
• Necessity’s mother and daughter
Quantum computing
• Advantage, compatibility, risk, visibility
Carbon nanotubes (or gallium arsenide) vs. silicon
• Autocatalysis
One nanoassembler leads to another finer one
• Memes
Biomimicry, small rod logic
Scanning Tunneling Microscope
(STM)
Our Version:
Real Version:
a)
Electrons jump 1 nm gap from tip to sample
as wave (tunneling through energy barrier).
b)
Sweep tip, keeping it constant height and
measuring voltage difference.
c)
OR, sweep tip, raising and lowering it to
keep constant voltage.
1.
Working with a partner, select one
Mystery Card and a multimeter set
to measure resistance.
2.
Probe black near lower right corner
of the card, probe red near upper
left corner, shifting until low
resistance is found.
3.
One person moves the red probe,
to scan across in rows (use a
straight edge). Other person notes
on a diagram drawn in notebook
resistance is found.
4.
Get another card and switch roles.