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

Результат исследований: Материалы для журналаСтатья

Аннотация

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.

Язык оригиналаАнглийский
Номер статьи1904954
ЖурналSmall
Том15
Номер выпуска50
DOI
СостояниеОпубликовано - 1 дек 2019

ASJC Scopus subject areas

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

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    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