Tuning Quantum Dots Coupling Using Organic Linkers with Different Vibrational Modes

Yuval Kolodny, Stav Fererra, Veniamin Borin, Shira Yochelis, Carlo Nazareno Dibenedetto, Morin Mor, Joanna Dehnel, Sergei Remmenik, Elisabetta Fanizza, Marinella Striccoli, Igor Schapiro, Efrat Lifshitz, Yossi Paltiel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Signatures of long-lived quantum coherence in light-harvesting complexes invoked a hypothesis that the protein-scaffold vibrations assist energy transfer by bridging energy gaps. To address this hypothesis experimentally in a model system, we compare the coupling strength of donor-acceptor quantum dots (QDs) linked by different organic linkers. The linkers are of the same length, with the same headgroups, but differ in one atom at the center of the chain (carbon, sulfur, or oxygen), which changes the vibrational modes of the molecule. We have studied the energy transfer using these linkers both in dimers of QDs, suspended in solution, and in solid multilayered films. Strongest coupling is achieved when a linker vibration (asymmetric stretch around the central atom in this case) matches the energy gap. The results provide experimental support for the theoretical idea of vibration-assisted transport and noise-assisted quantum transport (NEQT) and have important implications for the artificial design of many-particle nanodevices in which interparticle coupling tuning is required.

Original languageAmerican English
Pages (from-to)16159-16165
Number of pages7
JournalJournal of Physical Chemistry C
Issue number29
StatePublished - 23 Jul 2020

Bibliographical note

Funding Information:
This work is financially supported by the H2020 FET project COPAC (contract agreement no. 766563). I.S. gratefully acknowledges funding by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant no. 678169, “PhotoMutant”).

Publisher Copyright:
Copyright © 2020 American Chemical Society.


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