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

Research output: Contribution to journalArticle

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.

Original languageEnglish
Article number1904954
JournalSmall
Volume15
Issue number50
DOIs
Publication statusPublished - 1 Dec 2019

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Keywords

  • crystal defects
  • mesocrystals
  • nanoparticles
  • superlattices
  • X-ray scattering

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Cite this

Mukharamova, N., Lapkin, D., Zaluzhnyy, I. A., André, A., Lazarev, S., Kim, Y. Y., Sprung, M., Kurta, R. P., Schreiber, F., Vartanyants, I. A., & Scheele, M. (2019). Revealing Grain Boundaries and Defect Formation in Nanocrystal Superlattices by Nanodiffraction. Small, 15(50), [1904954]. https://doi.org/10.1002/smll.201904954