Will charge transfer without friction

I know rubbing two objects of different materials together will result in a negative charge on whichever material has a higher electron affinity. However, I was wondering if a negatively charged conductor (which has low electron affinity) and a neutral insulator are touching, will electrons move to the insulator over time (no friction between them)? I know there would be a potential difference since the conductor is negatively charged, so would that be enough to make the electrons move? Or does there absolutely need to be friction?

• Move any object along another object in normal conditions and you will always get some friction, even a small amount. – user81619 Aug 20 '15 at 20:18
• I can easily transfer charge from one object to another without friction. For example, I can make an electron beam and spray it onto objects. So, while I don't think that answers your question, I would say that your question is not as well formed and stated as you might like to get good answers. – Jon Custer Aug 20 '15 at 20:25
• I meant exactly what I said. If you have a negatively charged conductor (say copper), and a neutral insulator (plastic for example), will charge move from the conductor to the insulator? Assume there is no movement between the two (so then no kinetic friction). – T. Centa Aug 21 '15 at 23:37
• Although the part 'tribo-' comes from the Greek for "rubbing", τρίβω (τριβή: friction), the two materials only need to come into contact and then separate for electrons to be exchanged. en.wikipedia.org/wiki/Triboelectric_effect#Cause – Keith McClary Aug 22 '15 at 1:04

            I WOULD BE GLAD FOR ANY FEED BACKS.