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Solvent controlled 2D structures of bottom-up fabricated nanoparticle superlattices
Citation Link: https://doi.org/10.15480/882.5013
Publikationstyp
Journal Article
Publikationsdatum
2023-02-08
Sprache
English
Enthalten in
Volume
15
Issue
9
Start Page
4506
End Page
4514
Citation
Nanoscale 15 (9): 4506-4514 (2023-02-08)
Publisher DOI
Scopus ID
PubMed ID
36753337
Publisher
RSC Publ.
We demonstrate that oleyl phosphate ligand-stabilized iron oxide nanocubes as building blocks can be assembled into 2D supercrystalline mono- and multilayers on flat YSZ substrates within a few minutes using a simple spin-coating process. As a bottom-up process, the growth takes place in a layer-by-layer mode and therefore by tuning the spin-coating parameters, the exact number of deposited monolayers can be controlled. Furthermore, ex situ scanning electron and atomic force microscopy as well as X-ray reflectivity measurements give evidence that the choice of solvent allows the control of the lattice type of the final supercrystalline monolayers. This observation can be assigned to the different Hansen solubilities of the solvents used for the nanoparticle dispersion because it determines the size and morphology of the ligand shell surrounding the nanoparticle core. Here, by using toluene and chloroform as solvents, it can be controlled whether the resulting monolayers are ordered in a square or hexagonal supercrystalline lattice.
DDC Class
600: Technik
Publication version
publishedVersion
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