Influence of linker molecules on charge transport through self-assembled single-nanoparticle devices
We investigate electrical characteristics of single-electron electrode/nanoisland/electrode devices formed by alkanedithiol assisted self-assembly. Contrary to predictions of the orthodox model for double tunnel junction devices, we find a significant (∼fivefold) discrepancy in single-electron charging energies determined by Coulomb blockade (CB) voltage thresholds in current-voltage measurements versus those determined by an Arrhenius analysis of conductance in the CB region. The energies do, however, scale with particle sizes, consistent with single-electron charging phenomena. We propose that the discrepancy is caused by a multibarrier junction potential that leads to a voltage divider effect. Temperature and voltage dependent conductance measurements performed outside the blockade region are consistent with this picture. We simulated our data using a suitably modified orthodox model. © 2005 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Zabet-Khosousi, A., Suganuma, Y., Lopata, K., Trudeau, P., Dhirani, A., & Statt, B. (2005). Influence of linker molecules on charge transport through self-assembled single-nanoparticle devices. Physical Review Letters, 94 (9) https://doi.org/10.1103/PhysRevLett.94.096801