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ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby December 8, 2014
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Is It Small Enough?
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Magic Nanoscale (1 to 100nm)
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How Small Nano Is?
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Nanoscience, Nanotechnology, and Nanoengineering
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Increase of Surface Area by Cutting
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Surface Area to Volume Ratio
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Percentage of Surface Atoms (3D)
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Nanoengineering with Surface Effect
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Nanoparticle Size/Shape versus Color
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Interaction at Nanoscale At macroscale, gravitational force is usually dominant. At nanoscale, atomic force, particularly electrical forces are generally governing.
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Atomic Force for Imaging Forces (van der Waals) between tip and surface depends on the tip height
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Organized Structure from Self-Assembly
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Electron Beam for Nanofabrication
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Electron Beam for Imaging
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Material Identification
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Have Fun with Nano Products Nonstick umbrella, stain-free coating ! Strong adhesion tape ! Strong automobile tires from rubber/carbon nanotube composite!
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Review Questions How small is small? What is the nanometer size? Why Nano is a magic scale? In your words describe the difference between nanoscience, nanotechnology, and nanoengineering. What is the size effects in terms of surface to volume ratio and quantum confinement of nanoparticles? Give some examples for application of nanopowders? Can self-assembly happens at macroscale? What tools can be used for nanofabrication and imaging? List a few nano-products related to our daily life?
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