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Nanotechnology bears the promise of engineering at an atomic
scale--of assembling atoms in arrangements that are completely
unnatural, thereby creating materials with properties that have
never been seen before. This may sound like science fiction,
but it has been going on for more than 30 years, since the
invention of Molecular Beam Epitaxy (MBE). MBE provides a way
of growing a block of material one sheet of atoms at a time.
By mixing different types of atoms in various combinations,
it is possible to "tune" the properties of the resulting material.
For example, the laser diode in your CD player is probably made
from silicon. It shines a particular wavelength of light
based on the energy gap between the conduction and valence
bands in silicon. That same laser diode could be "tuned" to
emit a different wavelength by building it with a new material
engineered to have a different band gap.
MBE is just one technique for building materials on an atomic
scale. Many other techniques are also under investigation,
including dragging atoms via a Scanning Tunneling Microscope (STM)
tip, and Self-Assembled Monolayers (SAM).
Learn more about material science from the resources available
on this site, listed below.
More information on Material science can be found here.
Bandstructure of Carbon Nanotubes and Nanoribbons
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14 Jun 2007 | Learning Modules | Contributor(s): James K Fodor, Seokmin Hong, Jing Guo
This learning module introduces users to the Carbon-Nano Bands simulation tool, which simulates the bandstructure of Carbon Nanotubes (CNTs) and Nanoribbons (CNRs). To gives users a strong …
Introduction to CNTbands
28 Jun 2007 | Learning Modules | Contributor(s): James K Fodor, Jing Guo
This learning module introduces nanoHUB users to the CNTbands simulator. A brief introduction to CNTbands is presented, followed by voiced presentations featuring the simulator in action. Upon …
Introduction to Molecular Conduction
21 Jul 2005 | Learning Modules | Contributor(s): Ferdows Zahid, Magnus Paulsson, Avik Ghosh, Supriyo Datta
A scanning probe microscope brushes the tips of molecules rising up from a gold substrate. After making contact, the probe measures a very strange current-voltage relationship--linear portions …
Introduction to Nanofluidics
26 May 2005 | Learning Modules | Contributor(s): Susan Sinnott
The purpose of this learning module is to introduce students to some fundamental concepts in Nanofluidics. The module includes a pretest (without keys), a presentation, reading materials on …
PN Junction Theory and Modeling
14 Sep 2005 | Learning Modules | Contributor(s): Dragica Vasileska
This set of lecture notes is intended to help students learn the basics of PN junction theory and modeling.
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