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Science Forum Index » Nanotechnology Forum » BuckyBoosted Bandgaps: Hydraulic Onions, Radial Polarization
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| sanman |
 Posted: Sun Aug 24, 2003 8:33 pm |
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I've already posted 2 previous articles on this subject:
http://groups.google.com/groups?dq=&hl=en&lr=&ie=UTF-8&group=sci.nanotech&selm=bhc8070p2e%40enews3.newsguy.com
http://groups.google.com/groups?dq=&start=25&hl=en&lr=&ie=UTF-8&group=sci.physics.particle&selm=f144e162.0308201542.62ef7580%40posting.google.com
And here now is my third:
Could we improve things by substituting the buckyonion into our
picture?
Most molecules don't have an inside and an outside, but fullerene
molecules including buckyonions certainly do. This opens up the
possibility of polarizing them in the radial direction, perhaps by
having negatively charged anions surrounding the exterior of the
buckyonion. Suppose we could polarize the spherically symmetrical
buckyonion in the radial direction, inducing electronic charge to
migrate inwards. The delocalized pi-electrons of the graphitic carbon
layers could lend themselves towards charge migration.
Note that the surface area of a buckyonion's exterior is greater than
the surface area of its internal cavity wall. Now think of how the
hydraulic brakes on your car work, or even how your pneumatic bicycle
pump works -- thru the use of fluids, these devices are taking the
force applied across a given area and concentrating that force so that
it is applied across a smaller area, effectively increasing the
pressure.
In a vaguely analogous fashion, radial polarization of the buckyonion
might permit it to "hydraulically" push a greater amount of electronic
charge into a smaller amount of space than might otherwise be
possible. This "hydraulic" effect could be applied towards the
quantum-electrodynamic compression of the electronic orbitals of an
encapsulated heavy atom at the center of the buckyonion's interior
cavity, to the point of significantly increasing the photonic bandgap
properties of that heavy atom.
Since the Coulomb force falls off with r^2, we know that tighter and
more compressed orbital radii would correspond to larger energy
potentials. The larger energy deltas from electronic transitions
involving such orbitals would mean increased bandgap which would
correspond to absorption of higher-energy EM rays.
Bandgap properties might be "tuned" by selection of appropriate number
of buckyonion layers and their radius, selection of an appropriate
heavy atom, and by the extent of the external polarizing influence. If
absorption could be pushed into the gamma-ray region of the spectrum,
then it would effectively mean an overlap between the energy scales of
bound nucleons and the energy scales of bound electrons.
This would provide a means to convert energy released from nucleonic
energy transitions into energy of electrons. It might also provide a
mechanism for down-conversion of high-energy photons into lower energy
ones.
http://www.rjgeib.com/thoughts/shiva/shiva.html
"...now I am become Death [Shiva], the Destroyer of worlds..."
- Physicist J Robert Oppenheimer
Supervising Scientist Manhattan Project
"...now I am become [Vishnu] the Sustainer, the Preserver..."
- Me?  |
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