+ All Categories
Home > Documents > ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb...

ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb...

Date post: 02-Jan-2016
Category:
Upload: miles-dean
View: 212 times
Download: 0 times
Share this document with a friend
Popular Tags:
19
ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015
Transcript
Page 1: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

ABCs of Nano– a big picture of nanoscience,

nanotechnology and

nanoengineering

Dawen Li,

Shoieb Shaik,

Scott Wehby

June 22, 2015

Page 2: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Is It Small Enough?

Page 3: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Magic Nanoscale (1 to 100nm)

Why nanoscale?

• Novel material properties and phenomena only observed in the nanoscale world.

• Impact our daily life in all areas, such as healthcare, environment, food, and energy.

Page 4: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

How Small Nano Is?

Page 5: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Nanoscience, Nanotechnology, and Nanoengineering

Page 6: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Increase of Surface Area by Cutting

Page 7: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Surface Area to Volume Ratio

26lS

3lV

lVS 6

Page 8: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Percentage of Surface Atoms (3D)

Page 9: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Nanoengineering with Surface Effect

Page 10: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Nanoparticle Size/Shape versus Color

Page 11: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Interaction at Nanoscale

• At macroscale, gravitational force is usually dominant.

• At nanoscale, atomic force, particularly electrical forces are generally governing.

Page 12: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Atomic Force for Imaging

Forces (van der Waals) between tip and surface depends on the tip height

Page 13: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Organized Structure from Self-Assembly

Page 14: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Electron Beam for Nanofabrication

Page 15: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Electron Beam for Imaging

Page 16: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Element Identification

Page 17: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Have Fun with Nano Products

Nonstick umbrella,

stain-free coating !

Strong adhesion tape !

Strong automobile

tires from

rubber/carbon

nanotube composite!

Page 18: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

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?

Page 19: ABCs of Nano – a big picture of nanoscience, nanotechnology and nanoengineering Dawen Li, Shoieb Shaik, Scott Wehby June 22, 2015.

Recommended