NANOTECHNOLOGY

NANOTECHNOLOGY - NANOTECHNOLOGY Plenty of Room at this...

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NANOTECHNOLOGY “Plenty of Room at this bottom” : referring to Feynman -1 m = a billion nm DNA strand = 2nm a) Photolithography = Take a picture and reduce it and impress it on a microchip. Thus, you can design on a large scale, and then ruduce. b) Atomic Forve Microscopy (AFM) = Read a surface using a “cantilever” that is connected to a laser beam which reflects on a photodetector. Detecting changes in the surface structure allows you to read. -Can write things *Sulfur on MoS 2 *CO on platinum *Iron on platinum *At nano level particles have properties that are very different from those observed at macroscopic scale. -e.g Gold nanoparticles stick to cancer cells and make them shine Quantum Dots = Cadmium Selenide fluoresce with different colours depending on their size. *Proportionally nano particles exhibit very large surface area compared to their volume. e.g 1000 little cubes reduced 10 times means 10 x more surface area
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NANOTECHNOLOGY - NANOTECHNOLOGY Plenty of Room at this...

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