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Issue 36, 2015
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Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: indirect evidence for a permanent dipole moment

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Abstract

Single nanoparticle studies of charge trapping and de-trapping in core/shell CdSe/ZnS nanocrystals incorporated into an insulating matrix and subjected to an external electric field demonstrate the ability to reversibly modulate the exciton dynamics and photoluminescence blinking while providing indirect evidence for the existence of a permanent ground state dipole moment in such nanocrystals. A model assuming the presence of energetically deep charge traps physically aligned along the direction of the permanent dipole is proposed in order to explain the dynamics of nanocrystal blinking in the presence of a permanent dipole moment.

Graphical abstract: Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: indirect evidence for a permanent dipole moment

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Publication details

The article was received on 05 Jun 2015, accepted on 05 Aug 2015 and first published on 05 Aug 2015


Article type: Paper
DOI: 10.1039/C5NR03714J
Nanoscale, 2015,7, 14897-14905

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    Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: indirect evidence for a permanent dipole moment

    H. Zang, M. Cristea, X. Shen, M. Liu, F. Camino and M. Cotlet, Nanoscale, 2015, 7, 14897
    DOI: 10.1039/C5NR03714J

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