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, 2015 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. Aug 20, 2015 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). Aug 21, 2015 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 Aug 22, 2015 at 1:04

            I WOULD BE GLAD FOR ANY FEED BACKS.