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Electron microscopy of nanoparticle superlattice formation at a solid-liquid interface in nonpolar liquids

  • Nanoparticle superlattice films form at the solid-liquid interface and are important for mesoscale materials, but are notoriously difficult to analyze before they are fully dried. Here, the early stages of nanoparticle assembly were studied at solid-liquid interfaces using liquid-phase electron microscopy. Oleylamine-stabilized gold nanoparticles spontaneously formed thin layers on a silicon nitride (SiN) membrane window of the liquid enclosure. Dense packings of hexagonal symmetry were obtained for the first monolayer independent of the nonpolar solvent type. The second layer, however, exhibited geometries ranging from dense packing in a hexagonal honeycomb structure to quasi-crystalline particle arrangements depending on the dielectric constant of the liquid. The complex structures formed by the weaker interactions in the second particle layer were preserved, while the surface remained immersed in liquid. Fine-tuning the properties of the involved materials can thus be used to control the three-dimensional geometry of a superlattice including quasi-crystals.

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Metadaten
Document Type:Article
Author:Elisa Cepeda-PerezORCiD, David DoblasORCiD, Tobias KrausORCiD, Niels de JongeORCiD
URN:urn:nbn:de:bsz:291:415-3025
URL:https://advances.sciencemag.org/content/advances/6/20/eaba1404.full.pdf
DOI:https://doi.org/10.1126/sciadv.aba1404
Parent Title (English):Science Advances
Volume:6
Issue:20
Pagenumber:eaba1404
Language:English
Year of first Publication:2020
Release Date:2022/11/18
Impact:13.136 (2020)
Scientific Units:Innovative Electron Microscopy
Structure Formation
Open Access:Open Access
Signature:INM 2020/052
Licence (German):License LogoCreative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International