[Noisebridge-discuss] Fwd: You've probably seen this: Squishy Circuits

[Jonathan Foote]

Super interesting!

I had to look up "candurin" listed in the ingredients of the silver icing

Basically, it's Ti02-coated mica nanoparticles: the same stuff they
put in shampoo to make it pearlescent (and in the awesome
Exploratorium shimmer globe).

https://webcache.googleusercontent.com/search?q=cache:WA_mqbLu4GQJ:www.merck-chemicals.com/pharmaceutical-ingredients/candurin-silver-colors/c_wN2b.s1L2KwAAAEWGywfVhTn+

Note zero silver, just two of the best insulators on the planet!  So
the conductivity in the icing must come ionically from whatever else
is polar. Christoph, did you measure the resistance when it was dry?

(Also note that TiO2 was recently classified as a possible carcinogen:
eat up those yummy nanoparticles!)

So I'd still like to find a conductive dopant that works when dry.
I've seen powdered aluminum (for use in thermite, among other fun
things) but I don't know how conductive it is (aluminum in the
atmosphere undergoes almost immediate oxidation to get a coating of
insulating Al0) -- does anybody know?

-J







On Thu, Jul 29, 2010 at 3:26 PM, Christoph Maier
<cm.hardware.software.elsewhere at gmail.com> wrote:
> On Thu, 2010-07-29 at 14:31 -0700, Michael Shiloh wrote:
>> This should be well photographed. There will be much interest in the
>> results.
>>
>> I'm willing to contribute a scope probe that can get doughy. For
>> science, of course.
>
> Too bad I'm busy with squishy circuits here in San Diego ...
>
> Christoph
> http://pony.noisebridge.net/~cmaier/recherche_du_temps_perdu/
>
>
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