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We present a theoretical description of resonant charge transfer incollisions of nano-particles, specifically for $C_{60} + C_{60}^+$ collisions.We predict that transient bonds between colliding fullerenes can significantlyextend the interaction time, allowing for a greater probability of chargetransfer. In our model, the dumbbell-shaped $(C_{60}-C_{60})^+$ quasi-molecule,that is temporarily formed during the collision, is described as a dynamicsystem of 120 zero-range potentials. Using this model, we calculate theexchange interaction between colliding fullerenes and subsequently determinethe corresponding charge transfer cross sections at different collisionvelocities. Our results have been verified with data obtained from quantummolecular dynamics simulations of the fullerene collisions. The presentedtheoretical model provides a description of the experimental data on the$C_{60} + C_{60}^+ $ resonant charge transfer collision through the inclusionof the temporary formation of dumbbell-shaped fullerene molecules at lowcollision velocities.

Charge Transfer via Temporary Bonds in $C_{60} + C_{60}^+$ Molecular Collisions