A basic capacitor consists of two metal plates , or conductors ( typically aluminum ) , separated by an insulator , such as air or a film made of plastic , or ceramic .
一个普通的电容包括两块由绝缘体(如空气或塑料、陶瓷膜)隔开金属片或导体(通常为铝)。
Paul sheehan of the naval research laboratory in washington , elisa riedo at georgia tech and colleagues have now exploited the fact that graphene oxide , which is an insulator , converts back to conducting graphene when heated .