Re: electrical power in nanomachines
From: Peter H Proctor (drp_at_drproctor.com)
Date: 09/22/04
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Date: 22 Sep 2004 18:17:49 GMT
On 12 Sep 2004 19:22:21 GMT, jsn@panix.com (John S. Novak, III) wrote:
>You're talking about a system designed to release one electron every
>few seconds, on average.
>
>This implies strongly that you've more than reached the limits of
>classical scaling laws and had better start thinking in a quantum
>mechanical regime and including things like tunnelling effects, etc.
One or my colleages, John McGinness, built the first organic
electronic device three decades ago. He claims the definition of
"nanotech" is anything in the quantum realm. Not so coincidentally,
this starts at about 100 nanometers.
>> Again, I am leaning toward making such machines larger than a micron.
>
>What this means, basically, is that capacitors as energy storage
>devics suck in terms of energy density. (And they have other
>problems, too.)
Batteries typically have 10-100 times the energy-storage capacity of
the best equivalent-sized ultracapaciter. There is one out-- energy
stored in a capaciter goes up as the voltage squared. But this
causes other problems.
PHP
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