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journal article·2019-12Open access

Revealing Grain Boundaries and Defect Formation in Nanocrystal Superlattices by Nanodiffraction

Nastasia Mukharamova, Dmitry Lapkin, Ivan A. Zaluzhnyy, Alexander André, Sergey Lazarev, Young Yong Kim, Michael Sprung, Ruslan P. Kurta, Frank Schreiber, Ivan A. Vartanyants, Marcus Scheele

Small· Volume 15· Issue 50
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Source abstract

Abstract

Abstract X‐ray nanodiffraction is applied to study the formation and correlation of domain boundaries in mesocrystalline superlattices of PbS nanocrystals with face‐centered cubic structure. Each domain of the superlattice can be described with one of two mesocrystalline polymorphs with different orientational orders. Close to a grain boundary, the lattice constant decreases and the superlattice undergoes an out‐of‐plane rotation, while the orientation of the nanocrystals with respect to the superlattice remains unchanged. These findings are explained with the release of stress on the expense of specific nanocrystal–substrate interactions. The fact that correlations between adjacent nanocrystals are found to survive the structural changes at most grain boundaries implies that the key to nanocrystal superlattices with macroscopic domain sizes are strengthened interactions with the substrate.
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Research context

Nanomaterials

OpenAlex topics: Quantum Dots Synthesis And Properties · Material Dynamics and Properties · nanoparticles nucleation surface interactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Deutsches Elektronen‐Synchrotron DESY Notkestrasse 85 D‐22607 Hamburg Germany

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) Kashirskoe shosse 31 115409 Moscow Russia

Institute of Physical and Theoretical Chemistry University of Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany

Tomsk Open Laboratory for Material Inspection (TOLMI) National Research Tomsk Polytechnic University (TPU) pr. Lenina 30 634050 Tomsk Russia

European XFEL GmbH Holzkoppel 4 D‐22869 Schenefeld Germany

Institute of Applied Physics University of Tübingen Auf der Morgenstelle 10 72076 Tübingen Germany

Center for Light‐Matter Interaction Sensors & Analytics LISA+ University of Tübingen Auf der Morgenstelle 15 72076 Tübingen Germany

Funding

Deutsche Forschungsgemeinschaft · Tomsk Polytechnic University · Russian Science Foundation

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