Computer & Chemical Engineering
Capacitors allow an AC current to pass while blocking a DC current. At their simplest, they're formed from two sheets of metal separated by an insulator called the dielectric.
The original type of electrolytic capacitor was formed by rolling up layers of aluminium foil, sandwiched with paper soaked in an electrolyte.
Tetracyanoquinodimethane provides a replacement for the liquid electrolyte. Polymers based on this organic compound are plastics, but unlike most plastics they can conduct electricity.
Tetracyanoquinodimethane (TCNQ) is the organic compound with the formula (NC)2CC6H4C(CN)2.