From colloidal CdSe quantum dots to microscale optically anisotropic supercrystals through bottom-up self-assembly

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

4 Scopus Citations
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Author(s)

  • Sergei A. Cherevkov
  • Dominika-Olga A. Volgina
  • Viktor V. Zakharov
  • Filipp E. Komissarenko
  • Alexey A. Shcherbakov
  • Benjamin T. Hogan
  • Anna Baldycheva
  • Anatoly V. Fedorov
  • Igor R. Nabiev
  • Alexander V. Baranov

Detail(s)

Original languageEnglish
Pages (from-to)12904-12911
Journal / PublicationJournal of Materials Chemistry C
Volume6
Issue number47
Online published14 Nov 2018
Publication statusPublished - 21 Dec 2018
Externally publishedYes

Abstract

The development of fabrication techniques for novel nanostructured materials is one of the key tasks of modern materials science. One pathway to successfully complete this task is the bottom-up assembly of colloidal nanoparticles into ordered superstructures, possessing both the properties of individual nanoparticles and further novel properties resulting from their interactions. However, nanoparticle self-assembly depends on a variety of parameters, which makes the precise control of this process a complicated problem. Here, the time course of quantum dot (QD) self-assembly into ordered superstructures has been analyzed, along with the evolution of their morphological and optical properties. QD self-assembly occurs through two distinct stages (homo- and hetero-geneous), leading to the formation of supercrystals with a layered morphology. Analysis of the optical properties throughout the superstructures' growth has shown that the absorption and photoluminescence (PL) bands are blue shifted, retaining almost the same PL lifetimes as in the initial QD solution. The supercrystals formed possess a further unique optical property caused by their layered morphology; namely, a four-fold symmetry characterized by strong birefringence. Such supercrystals may be used for the fabrication of microscale optical paths with high extinction coefficients and specific polarization properties for novel optoelectronic devices.

Citation Format(s)

From colloidal CdSe quantum dots to microscale optically anisotropic supercrystals through bottom-up self-assembly. / Ushakova, Elena V.; Cherevkov, Sergei A.; Volgina, Dominika-Olga A.; Zakharov, Viktor V.; Komissarenko, Filipp E.; Shcherbakov, Alexey A.; Hogan, Benjamin T.; Baldycheva, Anna; Fedorov, Anatoly V.; Nabiev, Igor R.; Baranov, Alexander V.

In: Journal of Materials Chemistry C, Vol. 6, No. 47, 21.12.2018, p. 12904-12911.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal