1. Instructed on: 02-Mar-2012 | Session: #07
Nanotechnology
By: Mohanad Yehia
Topic Code: TCW-06-2012
All Copy Rights Saved to the 7th Students’ Conference on Communication and Information Based in the Faculty of Computers and Information Cairo University – Egypt 2011/2012 www.scci-cu.com
2. AGENDA
• How big is the nano.
• Definition of nanotechnology.
• Why nanotechnology?
• Applications.
3. How big is the nano?
• Nano is a prefix meaning
a billionth. Used primarily
in the metric system, this
prefix denotes a factor of
10−9 or 0.000000001.
5. Material perspective
• Materials reduced to the nanoscale can show different
properties compared to what they exhibit on a
macroscale, enabling unique applications.
• For instance
– opaque substances become transparent (copper)
– stable materials turn combustible (aluminum)
– insoluble materials become soluble (gold)
7. Nanomaterials
• The nanomaterials field includes subfields which
develop or study materials having unique
properties arising from their nanoscale dimensions.
8. Bottom-up approaches
• seek to arrange smaller components into more
complex assemblies.
• molecular self-assembly seeks to use molecular
recognition in particular, to cause single-molecule
components to automatically arrange themselves
into some useful conformation.
9. Top-down approaches
• seek to create smaller devices by using larger ones to
direct their assembly.
• Many technologies that descended from
conventional solid-state silicon methods for
fabricating microprocessors are now capable of
creating features smaller than 100 nm.
