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About Nanotechnology

About Nanotechnology. - general informations -. What is Nanotechnology?. Nanotechnology is the creation and use of materials or devices at extremely small scales. 1 nm = 0.000000001 m. Tools In Nanotechnology. The main tools used in nanotechnology are three main microscopes

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About Nanotechnology

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  1. About Nanotechnology - general informations -

  2. What is Nanotechnology? • Nanotechnology is the creation and use of materials or devices at extremely small scales. 1 nm = 0.000000001 m

  3. Tools In Nanotechnology • The main tools used in nanotechnology are three main microscopes • Transmission Electron Microscope (TEM) • Atomic Force Microscope (AFM) • Scanning Tunneling Microscope (STM)

  4. Concept first introduced by American physicist Richard P. Feynman (1918-1988) Calculated that an encyclopedia set could be compressed to fit the head of a pin. Predicted several aspects in today’s nanotechnology Advanced microscopes Developments in fabrication methods Possibilities of atom-to-atom assembly Nanotechnology Foretold

  5. Transmission Electron Microscope (TEM) • Uses high-energy electron beam to probe material with thickness < 100 nm. • Some electrons are absorbed or bounced off object; some pass through the object and make magnified images • Digital camera records images.

  6. Scanning Tunneling Microscope (STM) • Uses nanosized probe to scan objects and materials • Uses tunneling to detect surface and creates a map of surface • Rate of electrons that tunnel from probe to surface related to distance between probe and surface

  7. Other Uses for Tools • Microscopes used for imaging and manipulating nanostructures • “Arms” in AFMs and STMs used to move around individual atoms • Scientists at IBM made this image using an STM to with iron atoms into a circular structure

  8. Computer Circuits • Computer circuits are small pieces of semiconducting material containing an electronic circuit. • Most commonly used in computers • Consists of as many as millions of transistors. Nanotechnology is applied to the reduction in the size of these computer circuits!!!

  9. Methods of Developing Computer Circuits • The most common method of fabricating computer circuits is the top-down method • Thin films of materials, which make up a mask, are deposited on a silicon wafer • Unnecessary portions are etched off

  10. Benefits of Nanotechnology • In the computer world, nanotechnology is important to the development of small computer circuits that can reduced the size of computers.

  11. Disadvantages of Nanotechnology • Safety hazards with nanomaterials • Some studies detected possible cancer-causing properties of carbon nanotubes • Some nanomaterials bounded with other materials or components

  12. Conclusion • Nanotechnology has a lot of advantages in different kind of activities and becomes more present in our lives. • I think it is the way to develop new technologies , becoming more efficient.

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