Hi,
I'm looking to find a naturally conductive material e.g. a fluid from trees, plants or ?? something similar that has a very high specific resistivity maybe around 1/10th the resistivity of copper....
Anybody has suggestions?
Best regards,
Jesper
I'm looking to find a naturally conductive material e.g. a fluid from trees, plants or ?? something similar that has a very high specific resistivity maybe around 1/10th the resistivity of copper....
Anybody has suggestions?
Best regards,
Jesper
gentlevoice said:
I guess you want something with 1/10th the conductivity of copper - 10x the resistivity.
At room temperature, copper has a resistivity of 1.78x10^-8 Ohm m.
There are several naturally occuring metals with resistivity round 10^-7 to 2x10^-7.
For example, Iron is about 10^-7, Tin is 1.1x10^-7, Platinum close to tin (but much more expensive) and lead is about 2.2x10^-7.
Thanks for the suggestions!
@ SY: Some time ago I bought a piece of carbon for drawing, however, it has very high resistance... Do you mean graphite?
I was wondering though if one of you knew of a naturally occuring material that I could pick up in the nature if I went for a walk (to aim high). It might be gold if I'm lucky 😀
Jesper
@ SY: Some time ago I bought a piece of carbon for drawing, however, it has very high resistance... Do you mean graphite?
I was wondering though if one of you knew of a naturally occuring material that I could pick up in the nature if I went for a walk (to aim high). It might be gold if I'm lucky 😀
Jesper
Jesper check out Cabot...
http://w1.cabot-corp.com/controller.jsp?entry=product&N=23+4294967225+1000
http://w1.cabot-corp.com/controller.jsp?entry=product&N=23+4294967225+1000
a witch.
Sorry, there is a company here in boston, crowley and tripp, that make ribbon mics with some sort of very thin conductive polymer. I'm sure they've patented it though. I'd guess it has slightly less conductivity than aluminum.
Sorry, there is a company here in boston, crowley and tripp, that make ribbon mics with some sort of very thin conductive polymer. I'm sure they've patented it though. I'd guess it has slightly less conductivity than aluminum.
gentlevoice said:
No ? .......
1/10 specific resistivity = 10 times the conductance = does not exist ......
10 times the resistivity aka 1/10 the conductance is a different matter.
Very high specific resistivity = very very much more than copper.
However I cannot see the point of specifying such a parameter.
What does "ultra-thin" actually mean ?
A membrane in what context ? i.e. on what ?
High conductivity = metal film.
Medium = possibly graphite film.
/sreten.@sreten
My apology - as you say - also to my knowledge - a resistivity 10 times lower than copper is not available under normal circumstances. I misread the formula. I mean ~10 times the resistivity of copper.
I'm looking to make a membrane approximately 1 um thick with a conductive layer outside or inside the membrane material. There will be a strong and quite tight net to keep the membrane structured, however, I need to find a material that can fill out the "blanks"/ i.e. the holes in the net. Something that is highly conductive.
Preferably something readily available in the nature, like fluid from plants or ?? from insects, or the like.
Any suggestions?
Best,
Jesper
My apology - as you say - also to my knowledge - a resistivity 10 times lower than copper is not available under normal circumstances. I misread the formula. I mean ~10 times the resistivity of copper.
I'm looking to make a membrane approximately 1 um thick with a conductive layer outside or inside the membrane material. There will be a strong and quite tight net to keep the membrane structured, however, I need to find a material that can fill out the "blanks"/ i.e. the holes in the net. Something that is highly conductive.
Preferably something readily available in the nature, like fluid from plants or ?? from insects, or the like.
Any suggestions?
Best,
Jesper
Carbon fibre. It's just about the opposite from available in nature, it's very highly processed, but it's used for the finest electrodes - for investigating cells, that is.
I read an article on how to extract a single fibre from a tow and encapsulate it in glass IIRC.
Anyway, you'll be hard pressed to find a more slender conductor. I don't guarantee the conductivity tho' but I guess you can look it up if it's of interest.
w
I read an article on how to extract a single fibre from a tow and encapsulate it in glass IIRC.
Anyway, you'll be hard pressed to find a more slender conductor. I don't guarantee the conductivity tho' but I guess you can look it up if it's of interest.
w
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