US Patent 7875256 - Producing carbon nanocoils

http://www.freepatentsonline.com/7875256.html

This patent from National Taiwan University teaches a method of increasing the production yield of a type of nanostructure called carbon nanocoils useful to applications in sensors and EM shielding. Claim 1 reads:

1. A method for producing carbon nanocoils, comprising following steps:

(a) providing a substrate;

(b) forming a mixed solution of iron acetate and tin acetate on the surface of the substrate;

(c) heating the substrate and the solution to a predetermined temperature to form a catalyst on the substrate;

(d) placing the substrate and the catalyst into a reaction furnace; and

(e) introducing carbon-based gas and protective gas into the reaction furnace to grow carbon nanocoils on the surface of the catalyst.