$Revealing Grain Boundaries and Defect Formation in Nanocrystal Superlattices by Nanodiffraction$

Revealing Grain Boundaries and Defect Formation in Nanocrystal Superlattices by Nanodiffraction

Dades bibliogràfiques
Parent link:	Small Vol. 15, iss. 50.— 2019.— [1904954, 8 p.]
Autor corporatiu:	Национальный исследовательский Томский политехнический университет Институт неразрушающего контроля Международная научно-образовательная лаборатория неразрушающего контроля
Altres autors:	Mukharamova N. Nastasia, Lapkin D. Dmitry, Zaluzhnyy I. A. Ivan, Andre A. Alexander, Lazarev S. V. Sergey Vladimirovich, Kim Young Yong, Sprung M. Michael, Kurta R. Ruslan, Schreiber F. Frank, Vartanyants I. A. Ivan, Scheele M. Marcus
Sumari:	Title screen 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.
Publicat:	2019
Matèries:	электронный ресурс труды учёных ТПУ crystal defects mesocrystals nanoparticles superlattices X-ray scattering наночастицы рентгеновское рассеяние
Accés en línia:	https://doi.org/10.1002/smll.201904954
Format:	Electrònic Capítol de llibre
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=661621

Descripció
Sumari:	Title screen 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.
DOI:	10.1002/smll.201904954