Capacitor capacitance depends on area, so electrolytic ones uses systems to increase the area but they must be polarized.
Commercial thermal radiators usually are made of anodized aluminium
In plasma thruster design also it is needed electron emitters with large areas
So the question is if it exists raw films and materials for that uses and why are not usually found at market
I would need use them for electron emission, so the second question is where to find metal parts with nanotubes or where to find a place that makes the surface treatment for covering with nanotubes
It is seen that catalytic systems based on nanopowders, nanorods or elongated nanocrystals can offer energy-efficiency and precise scalability of material conversion into targeted products and electrochemical supercapacitors. Details can be found at DOI 10.1007/978-3-642-36430-3.
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