1. The Power of Nanoscale – Size Effect
Dawen Li, Shoieb Shaik, Dee Goldston, Karen Boykin, Elizabeth Allison, Scott Wehby, Bharat Soni
June 26, 2012

2. Magic Number – Nanometer (nm)
Billion
109
Million
106
Micro
10-6 (one millionth)
Nano
10-9 (one billionth)
Hair 100um=0.1mm=10^5 nm, scientific notation
Why not picotechnology? Nanoscale is the realm of the atom, we can not build anything based on sub atomic particles, such as neutron, protons and electrons, . Nano has reached the boundary.
1 nm = 3.5 gold atoms
lineup

3. Increase of Surface Area by Cutting

4. Collective Surface Area versus Size
Surface area doubles after each parent cube is divided into 8 equivalent cubes
Cubic number (n)
Total surface area 1
6 m2 8
12 m2 64
24 m2
512
48 m2

5. Collective Surface Area versus Size
Sugar cube
Granulated sugar

6. Example: Surface Area versus Size
Problem:
How many sub-cubes with1nm side length can be carved out of a parent cubic 1m each side? Find the collective surface area of the nano-sized cubes
Solution:
Volume of parent cube: 1 m3
Volume of nanocube: (1 x 10-9m)3
# of nancubes: 1 x 1027
Surface area of nanocube: 6 x (1 x 10-9m)2
Total surface area: (1 x 1027) x (6 x 10-18m2) = 6 x 109 m2
More than 2000 square miles, bigger than state of Delaware (1954 sq. mi. ). The power of nano !

7. Surface Area to Volume Ratio

8. Percentage of Surface Atoms (3D)

9. Ratio of Surface to Total Atoms
Choose your battle wisely: learn more and publish more
The surface to total atom ratio from approximately one-billionth to 88% as an object is scaled down!

10. Planar versus Interdigitated Interface
Planar interface
Planar interface
Interdigitated interface
Interdigitated interface
honesty and integrity: kind to others,
ability.
Only you can win the trust, then you can success

11. Nature Nanotechnologist - Gecko
Thousand 200nm projections provide enormous surface area.
Flexible projections make contact area controllable .
Glass surface not smooth any more at nanoscale

12. Nature Nanotechnologist - Lotus Flower
Nonstick umbrella, stain-free coating !
Symbol of purity, remains free of dirty even submerged in muddy water
Waxy surface make water drops bead up and roll off
Through bumpy surface, droplets roll over the surface (rather than slide over), efficiently pick up dust and dirt, like snow ball, leaving a clean surface

13. Have Fun in Nano Nanoscale abacus with molecule beads
Stadium built with Iron atoms on Copper
Color depends on nanoparticle size

14. 
Thank you
Roll Tide Roll