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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.
MSE 405 Lecture 27: Waves in Locally Periodic Media
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29 Jan 2011 | Online Presentations | Contributor(s): Mark Hersam
MSE 405 Lecture 11: Hydrogen Atoms II
MSE 405 Lecture 12: Quantum Numbers
MSE 405 Lecture 13: Bosons and Fermions
MSE 405 Lecture 14: Variational Principle
MSE 405 Lecture 15: Perturbation Theory
MSE 405 Lecture 16: Midterm Review I
MSE 405 Lecture 17: Midterm Review II
MSE 405 Lecture 18: Quantum Statistical Physics
MSE 405 Lecture 19: Arbitrary Potential
MSE 405 Lecture 20: Free Electron Theory I
MSE 405 Lecture 2: Wave Function
Properties of the wave function; Operators; Expectation value; Heisenberg uncertainty principle.
MSE 405 Lecture 3: Time Independent Schroedinger Equation
Eigenvalues and Eigenfunctions.
MSE 405 Lecture 4: Free Particle
MSE 405 Lecture 5: Bound Particles I
Square well; Energy levels.
MSE 405 Lecture 6: Bound Particles II
MSE 405 Lecture 7: Scattering and Tunneling
MSE 405 Lecture 8: Separation of Variables I
MSE 405 Lecture 9: Separation of Variables II
MSE 405 Lecture 10: Hydrogen Atoms I
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