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 |
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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 |