Nanotechnology/Top-down and bottom-up approaches

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Top-down and bottom-up approaches[edit]

  • Top-down refers to the traditional workshop or microfabrication method where tools are used to cut, mill and shape materials into the desired shape and order.
  • Bottom-up refers to methods where devices 'create themselves' by selfassembly. Chemical synthesis is a good example. Bottom-up should broadly speaking be able to produce devices in parallel and much cheaper than top-down methods, but getting control over the methods is difficult when things become larger and more bulky than what is normally made by chemical synthesis. Of course nature has had time to evolve and optimize self-assembly processes that can do wonders.

Microfabrication made smaller[edit]

Much of nanotechnology is based on methods from Microfabrication.


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