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Science Forum Index » Nanotechnology Forum » what if?
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| mg |
 Posted: Fri Aug 15, 2003 9:40 am |
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What if a quantum dot is exposed to x-rays? Will it emit similar to UV
excitation? If it is ionized, will emit ionized?
Just wondering...
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| J. Damon Hoff |
| Posted: Fri Aug 22, 2003 7:07 pm |
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Quote: What if a quantum dot is exposed to x-rays? Will it emit similar to UV
excitation?
This is not my field, so take this with a grain of salt; but my best
guess is that x-ray excitation of most quantum dot materials will
generate auger electrons -- not fluorescence.
Quote: If it is ionized, will emit ionized?
Huh? No... any emitted photons will not be ionized...
--Damon |
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| mg |
| Posted: Mon Aug 25, 2003 6:55 am |
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"J. Damon Hoff" <hoffj@umich.edu> wrote in message
news:bi6ep402rk8@enews3.newsguy.com...
Quote:
What if a quantum dot is exposed to x-rays? Will it emit similar to UV
excitation?
This is not my field, so take this with a grain of salt; but my best
guess is that x-ray excitation of most quantum dot materials will
generate auger electrons -- not fluorescence.
If it is ionized, will emit ionized?
Huh? No... any emitted photons will not be ionized...
Should have been "will they emit if ionized?". In other words, can the ions
have energy levels and transitions between them, emitting photons, or be
excited after recombination and again - emit photons? |
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| Parallax |
| Posted: Thu Aug 28, 2003 2:09 pm |
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"mg" <nospam@no.com> wrote in message news:<bid10v027o0@enews4.newsguy.com>...
Quote: "J. Damon Hoff" <hoffj@umich.edu> wrote in message
news:bi6ep402rk8@enews3.newsguy.com...
What if a quantum dot is exposed to x-rays? Will it emit similar to UV
excitation?
This is not my field, so take this with a grain of salt; but my best
guess is that x-ray excitation of most quantum dot materials will
generate auger electrons -- not fluorescence.
If it is ionized, will emit ionized?
Huh? No... any emitted photons will not be ionized...
Should have been "will they emit if ionized?". In other words, can the ions
have energy levels and transitions between them, emitting photons, or be
excited after recombination and again - emit photons?
X-ray Fluorescence depends on the quantum dot material and the x-ray
energy. Even very low Z materials emit characteristic x-rays. In some
cases, Auger electrons are the. Even ionized materials can emit
x-rays. |
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