A 230 foot long tape deployed from the satellite Prox-1 greatly reduced how long it took to deorbit. The tape was described as electrically conductive.
Was that property intended to help the satellite deorbit faster, or was the tape's atmospheric drag sufficient?
(Illustrations suggest that the tape is about 70 m x 0.1 m, or 7 m^2. It weighs "less than 2 pounds" or roughly 700 g, for an areal density of 100 g/m^2. Mylar is 1.4 g/cm^3, so if this is Mylar, its thickness is 0.07 mm = "2 mil," industrially common when foil-covered like a party balloon. But why foil-covered instead of just pure polyester?)