Particles with charged (positive and negative) fields

[rogeriopfm]

I am still kind of a noob with Maya, having been learning all I can the last five months.
Say I want to do some crazy stuff with Maya particles behaving like charged particles (ions for example). I managed once to make particles emit radial fields which faked collisions before I learned about nDynamics. Now I am trying to figure out some way I could use perhaps fields so that equal fields repel each other and opposite attract.
The goal is to simulate simple chemistry behaviour.
Any way without scripting you more veteran guys might remember about (fields emitted PP or something)? If its only possible with scripting it would be nice if someone knows a good direction to follow.

Thanks to all.

[joojaa]

[Dynamics] Fields->Use Selected as Source of Field

Then turn apply per vertex on for the field

[rogeriopfm]

Thanks! I really wasn't remembering to activate apply per vertex!

What if I want to source two fields on a particle group? I tried it but it seems that only one will work at a time. I was thinking that some kind of connection could be breaking when I source the second one.

[rogeriopfm]

Someone know the answer to my question?

Can we emit two fields (radial) from a particle source (emited from individual particles)?
One field is to affect the source particle group. The other is for affecting another particle group. One could be positive, the other negative. So Equal encountering particles repel and Different encountering particles attract each other.