ABCs of Nano a big picture of nanoscience

ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby December 8, 2014

Is It Small Enough?

Magic Nanoscale (1 to 100 nm)

How Small Nano Is?

Nanoscience, Nanotechnology, and Nanoengineering

Increase of Surface Area by Cutting

Surface Area to Volume Ratio

Percentage of Surface Atoms (3 D)

Nanoengineering with Surface Effect

Nanoparticle Size/Shape versus Color

Interaction at Nanoscale • At macroscale, gravitational force is usually dominant. • At nanoscale, atomic force, particularly electrical forces are generally governing.

Atomic Force for Imaging Forces (van der Waals) between tip and surface depends on the tip height

Organized Structure from Self-Assembly

Electron Beam for Nanofabrication

Electron Beam for Imaging

Material Identification

Have Fun with Nano Products Strong adhesion tape ! Strong automobile tires from rubber/carbon nanotube composite! Nonstick umbrella, stain-free coating !

Review Questions v How small is small? What is the nanometer size? v Why Nano is a magic scale? v In your words describe the difference between nanoscience, nanotechnology, and nanoengineering. v What is the size effects in terms of surface to volume ratio and quantum confinement of nanoparticles? v Give some examples for application of nanopowders? v Can self-assembly happens at macroscale? v What tools can be used for nanofabrication and imaging? v List a few nano-products related to our daily life?