NanoTechnology

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NanoTechnology

• David J. Swenson
• Spidercus

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Some Nano Applications

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What were covering

• What is it?
• History of Nanotechnology
• Basic Concepts
• Tools and Techniques
• Implications

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Why we are covering it

• Has an impact on you life
• Future the most important thing we have
• Test

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What is Nanotechnology?

• Nanotechnology is a broad field of science and
  technology whose theme is controlling matter on
  the atomic and molecular scale

Picture of a solid gold using scanning tunnel
microscopy ? ? ? ? The honey comb shaped patterns
are atoms packed together
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Richard Feynman

• First to talk about Nanotechnology
• Theres plenty of room at the bottom
• December 29 1959

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Norio Taniguchi

• Coined the Term Nanotechnology in a 1974 paper
• "On the Basic Concept of Nanotechnology"
• ..Consists of the processing of, separation,
  consolidation, and deformation of materials by
  one atom or by one molecule."

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Dr. K. Eric Drexler

• Engines of Creation The Coming Era of
  Nanotechnology (1986)
• Nanosystems Molecular Machinery, Manufacturing,
  and Computation (1992)

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Basic Concepts

• One nanometer one billionth of a meter
• Comparisons
• Marble to the Earth
• Double Helix has a 2nm diameter
• C-C bond .12-.15 nm apart
• Length a mans beard grow in the time it takes to
  bring the razor to his face
• Anything under 100nm is Nanotechnology

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Basic Concepts

• Lots of things change when shrunk down
• Copper becomes transparent
• Platinum and Gold become a catalyst
• Aluminum becomes combustible
• Gold becomes liquid at room temperature
• Silicon can become a conductor

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Current Nanotechnology

• Bottom Up approach
• Top down approach

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Bottom up approach

• Seek to make complex items out of small parts
• Double Helix

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Top down approach

• Takes larger items to make small things
• Microprocessor chips that can be seen by the
  naked eye create feature under 100nm

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Tools and Techniques

• Ultra microscope

Atomic force microscope
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Implications

• Smaller a particle the higher the surface area to
  volume ratio is causing loss of stability
• Potential for some Nano-materials to be toxic
• Nano-particles can get into just about anywhere

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UW-Platteville

• Nanotechnology announcement on the homepage last
  month

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Now its time for some questions!

• Who first said Nanotechnology?
• What are some comparisons for a nm?
• What were the two microscopes?
• What were the two approaches?
• Name some things that happen at a Nano scale.