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Colloidal quantum dot molecules manifesting quantum coupling at room temperature

Author

Listed:
  • Jiabin Cui

    (The Hebrew University of Jerusalem
    The Hebrew University of Jerusalem)

  • Yossef E. Panfil

    (The Hebrew University of Jerusalem
    The Hebrew University of Jerusalem)

  • Somnath Koley

    (The Hebrew University of Jerusalem
    The Hebrew University of Jerusalem)

  • Doaa Shamalia

    (The Hebrew University of Jerusalem
    The Hebrew University of Jerusalem)

  • Nir Waiskopf

    (The Hebrew University of Jerusalem
    The Hebrew University of Jerusalem)

  • Sergei Remennik

    (The Hebrew University of Jerusalem)

  • Inna Popov

    (The Hebrew University of Jerusalem)

  • Meirav Oded

    (The Hebrew University of Jerusalem
    The Hebrew University of Jerusalem)

  • Uri Banin

    (The Hebrew University of Jerusalem
    The Hebrew University of Jerusalem)

Abstract

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.

Suggested Citation

  • Jiabin Cui & Yossef E. Panfil & Somnath Koley & Doaa Shamalia & Nir Waiskopf & Sergei Remennik & Inna Popov & Meirav Oded & Uri Banin, 2019. "Colloidal quantum dot molecules manifesting quantum coupling at room temperature," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13349-1
    DOI: 10.1038/s41467-019-13349-1
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    Cited by:

    1. Bokang Hou & Michael Thoss & Uri Banin & Eran Rabani, 2023. "Incoherent nonadiabatic to coherent adiabatic transition of electron transfer in colloidal quantum dot molecules," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Zhaoqi Gu & Runlin Zhu & Tianci Shen & Lin Dou & Hongjiang Liu & Yifei Liu & Xu Liu & Jia Liu & Songlin Zhuang & Fuxing Gu, 2023. "Autonomous nanorobots with powerful thrust under dry solid-contact conditions by photothermal shock," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. Haonan Wang & Heejun Kim & Duanfei Dong & Keisuke Shinokita & Kenji Watanabe & Takashi Taniguchi & Kazunari Matsuda, 2024. "Quantum coherence and interference of a single moiré exciton in nano-fabricated twisted monolayer semiconductor heterobilayers," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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