Abstract
Low frequency impedance spectroscopy was applied on a Langmuir monolayer of alkylthiol passivated 35Å diameter silver quantum dots, as a function of interparticle separation distance. As interparticle spacing decreases below 30% of particle diameter, a reduction in interparticle charge tunneling time is observed. On further compression, the complex impedance of the films undergoes a transition from a parallel RC equivalent circuit to an inductive circuit. Optical reflectance changes in the films are consistent with the deduced metal-insulator transition.
| Original language | English |
|---|---|
| Pages (from-to) | 3807-3810 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 80 |
| Issue number | 17 |
| DOIs | |
| State | Published - 1998 |
| Externally published | Yes |