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Superstructures from lead sulfide quantum dots

Published online by Cambridge University Press:  27 April 2015

Elena V. Ushakova ,
Valery V. Golubkov ,
Aleksandr P. Litvin ,
Peter S. Parfenov ,
Sergei A. Cherevkov ,
Anatoly V. Fedorov  and
Alexander V. Baranov
Elena V. Ushakova
Affiliation:
ITMO University, 49 Kronverkskiy pr., Saint-Petersburg, 197101, Russia
Valery V. Golubkov
Affiliation:
Institute of Silicate Chemistry of Russian Academy of Sciences, 2 Adm. Makarova emb., Saint-Petersburg, 199034, Russia
Aleksandr P. Litvin
Affiliation:
ITMO University, 49 Kronverkskiy pr., Saint-Petersburg, 197101, Russia
Peter S. Parfenov
Affiliation:
ITMO University, 49 Kronverkskiy pr., Saint-Petersburg, 197101, Russia
Sergei A. Cherevkov
Affiliation:
ITMO University, 49 Kronverkskiy pr., Saint-Petersburg, 197101, Russia
Anatoly V. Fedorov
Affiliation:
ITMO University, 49 Kronverkskiy pr., Saint-Petersburg, 197101, Russia
Alexander V. Baranov
Affiliation:
ITMO University, 49 Kronverkskiy pr., Saint-Petersburg, 197101, Russia
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Abstract

The superstructures of different morphology (superlattices and supercrystals) are obtained by self-organization of lead sulfide quantum dots (QDs) on a substrate. In contrast to the SAXS patterns of isolated QDs in solutions, the X-ray intensity from ordered superstructures is modulated by the interference from the QDs in SLs or SCs leading to occurrence of the intense peaks at small scattering angles. By indexing the peaks in the SAXS patterns it is concluded that QD SLs are close-packed QD ensembles with the lattice parameter close to the dot diameter and QD SCs have primitive orthorhombic crystal lattice. Absorption and photoluminescence bands of superstructures are also analyzed.

Keywords

nanostructurex-ray diffraction (XRD)optical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1784: Symposium R – Photoactive Nanoparticles and Nanostructures , 2015 , mrss15-2135889
Copyright
Copyright © Materials Research Society 2015 

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References

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