But surfactants, if they remain on the tubes after they are sprayed onto a surface, impede the flow of electrons between tubes (blocking the freeway ramps, so to speak).

• 但是，如果溶液喷上表面之后，表面活性剂还留在碳管上，就会阻碍电子在碳管之间的流动（相当于阻塞了交流道）。