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Colloidal quantum dot molecules manifesting quantum coupling at room temperature

Coupling of atoms is the basis of chemistry, yielding the beauty and richness of molecules. We utilize semiconductor nanocrystals as artificial atoms to form nanocrystal molecules that are structurally and electronically coupled. CdSe/CdS core/shell nanocrystals are linked to form dimers which are t...

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Autores principales: Cui, Jiabin, Panfil, Yossef E., Koley, Somnath, Shamalia, Doaa, Waiskopf, Nir, Remennik, Sergei, Popov, Inna, Oded, Meirav, Banin, Uri
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915722/
https://www.ncbi.nlm.nih.gov/pubmed/31844043
http://dx.doi.org/10.1038/s41467-019-13349-1
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author Cui, Jiabin
Panfil, Yossef E.
Koley, Somnath
Shamalia, Doaa
Waiskopf, Nir
Remennik, Sergei
Popov, Inna
Oded, Meirav
Banin, Uri
author_facet Cui, Jiabin
Panfil, Yossef E.
Koley, Somnath
Shamalia, Doaa
Waiskopf, Nir
Remennik, Sergei
Popov, Inna
Oded, Meirav
Banin, Uri
author_sort Cui, Jiabin
collection PubMed
description Coupling of atoms is the basis of chemistry, yielding the beauty and richness of molecules. We utilize semiconductor nanocrystals as artificial atoms to form nanocrystal molecules that are structurally and electronically coupled. CdSe/CdS core/shell nanocrystals are linked to form dimers which are then fused via constrained oriented attachment. The possible nanocrystal facets in which such fusion takes place are analyzed with atomic resolution revealing the distribution of possible crystal fusion scenarios. Coherent coupling and wave-function hybridization are manifested by a redshift of the band gap, in agreement with quantum mechanical simulations. Single nanoparticle spectroscopy unravels the attributes of coupled nanocrystal dimers related to the unique combination of quantum mechanical tunneling and energy transfer mechanisms. This sets the stage for nanocrystal chemistry to yield a diverse selection of coupled nanocrystal molecules constructed from controlled core/shell nanocrystal building blocks. These are of direct relevance for numerous applications in displays, sensing, biological tagging and emerging quantum technologies.
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spelling pubmed-69157222019-12-18 Colloidal quantum dot molecules manifesting quantum coupling at room temperature Cui, Jiabin Panfil, Yossef E. Koley, Somnath Shamalia, Doaa Waiskopf, Nir Remennik, Sergei Popov, Inna Oded, Meirav Banin, Uri Nat Commun Article Coupling of atoms is the basis of chemistry, yielding the beauty and richness of molecules. We utilize semiconductor nanocrystals as artificial atoms to form nanocrystal molecules that are structurally and electronically coupled. CdSe/CdS core/shell nanocrystals are linked to form dimers which are then fused via constrained oriented attachment. The possible nanocrystal facets in which such fusion takes place are analyzed with atomic resolution revealing the distribution of possible crystal fusion scenarios. Coherent coupling and wave-function hybridization are manifested by a redshift of the band gap, in agreement with quantum mechanical simulations. Single nanoparticle spectroscopy unravels the attributes of coupled nanocrystal dimers related to the unique combination of quantum mechanical tunneling and energy transfer mechanisms. This sets the stage for nanocrystal chemistry to yield a diverse selection of coupled nanocrystal molecules constructed from controlled core/shell nanocrystal building blocks. These are of direct relevance for numerous applications in displays, sensing, biological tagging and emerging quantum technologies. Nature Publishing Group UK 2019-12-16 /pmc/articles/PMC6915722/ /pubmed/31844043 http://dx.doi.org/10.1038/s41467-019-13349-1 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Cui, Jiabin
Panfil, Yossef E.
Koley, Somnath
Shamalia, Doaa
Waiskopf, Nir
Remennik, Sergei
Popov, Inna
Oded, Meirav
Banin, Uri
Colloidal quantum dot molecules manifesting quantum coupling at room temperature
title Colloidal quantum dot molecules manifesting quantum coupling at room temperature
title_full Colloidal quantum dot molecules manifesting quantum coupling at room temperature
title_fullStr Colloidal quantum dot molecules manifesting quantum coupling at room temperature
title_full_unstemmed Colloidal quantum dot molecules manifesting quantum coupling at room temperature
title_short Colloidal quantum dot molecules manifesting quantum coupling at room temperature
title_sort colloidal quantum dot molecules manifesting quantum coupling at room temperature
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915722/
https://www.ncbi.nlm.nih.gov/pubmed/31844043
http://dx.doi.org/10.1038/s41467-019-13349-1
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