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Thermopower waves

Posted: Mon Mar 08, 2010 5:05 am
by DeltaV
Probably hype, but, in case not...
http://www.physorg.com/news187186888.html

Posted: Mon Mar 08, 2010 10:20 am
by Giorgio
Very interesting.

Nextbigfuture has some additional links and supplemental material worth of reading:
http://www.nature.com/nmat/journal/vaop ... 714-s1.pdf

Let's see if in the next monthes some other team will be able to replicate the experiments and confirm the measurements.

Posted: Mon Mar 08, 2010 5:35 pm
by Skipjack
This whole thing leaves me mighty confused and I have a feeling that it is being overhyped.
Also, why do they compare a combustion generator (more or less, from what I understand) with a Lithium Ion battery?
Then why would you want to inject something into yourself that will use combustion to power itself?
Does this thing now store energy, or does it produce electricity via a certain way of burning something?

Posted: Mon Mar 08, 2010 6:46 pm
by tombo
With the right absorbing additions a photon of say bremstrahlung or IR could create a pulse like a splash.
It would not be ongoing but could well travel the length of the tube like a soliton.
I'm just speculating here. It says it is not very efficient yet.

Posted: Mon Mar 08, 2010 9:11 pm
by DeltaV
At first glance, it looks like the CNTs are consumed in the process, a one-shot device.

I wonder if this would work with CNTs in thermal contact (at one end) with a metal plate that gets hit from the other side with thermal pulses. Not enough energy to destroy the CNTs, but maybe enough of a gradient to produce a voltage, repetitively.

It would also be interesting to know if this works with unrolled CNTs, better known as graphene. Ordinary graphite is just many layers of graphene, so the parallel structure is already there.