Revealing Grain Boundaries and Defect Formation in Nanocrystal Superlattices by Nanodiffraction
| Autor: | Marcus Scheele, Ivan A. Zaluzhnyy, Ruslan P. Kurta, Young Yong Kim, Michael Sprung, Alexander André, Sergey Lazarev, Dmitry Lapkin, Ivan A. Vartanyants, Nastasia Mukharamova, Frank Schreiber |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Superlattice Nanoparticle FOS: Physical sciences 02 engineering and technology Substrate (electronics) 010402 general chemistry 01 natural sciences Biomaterials Stress (mechanics) Condensed Matter::Materials Science Lattice constant General Materials Science Condensed Matter - Materials Science Condensed matter physics Materials Science (cond-mat.mtrl-sci) General Chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Crystallographic defect 0104 chemical sciences Nanocrystal ddc:540 Grain boundary 0210 nano-technology Biotechnology |
| Zdroj: | Small 1, 1904954 (2019). doi:10.1002/smll.201904954 |
| ISSN: | 1613-6829 |
| DOI: | 10.1002/smll.201904954 |
| Popis: | Small 1, 1904954 (2019). doi:10.1002/smll.201904954 X-ray nanodiffraction is applied to study the formation and correlation ofdomain boundaries in mesocrystalline superlattices of PbS nanocrystalswith face-centered cubic structure. Each domain of the superlattice can bedescribed with one of two mesocrystalline polymorphs with different orientationalorders. Close to a grain boundary, the lattice constant decreases andthe superlattice undergoes an out-of-plane rotation, while the orientation ofthe nanocrystals with respect to the superlattice remains unchanged. Thesefindings are explained with the release of stress on the expense of specificnanocrystal–substrate interactions. The fact that correlations between adjacentnanocrystals are found to survive the structural changes at most grainboundaries implies that the key to nanocrystal superlattices with macroscopicdomain sizes are strengthened interactions with the substrate. Published by Wiley-VCH, Weinheim |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text