title: Langmuir-Schaefer deposition of quantum dot multilayers.
abstract: The application of colloidal nanocrystals in various devices requires their assembly into well-defined mono- or multilayers. We explore the possibilities of the Langmuir-Schaefer technique to make such layers, using CdSe quantum dots as a model system. The layer quality is assessed using atomic force microscopy, transmission electron microscopy, and UV-vis absorption spectroscopy. For hydrophobic substrates, we find that the Langmuir-Schaefer technique is an excellent tool for controlled multilayer production. With hydrophilic substrates, dewetting induces a cellular superstructure. Combination with photolithography leads to micropatterned multilayers, and combination of different nanocrystal sizes allows for the formation of 2D binary superstructures.
authors.affiliation: Physics and Chemistry of Nanostructures, Ghent University, Krijgslaan 281-S3, 9000 Gent, Belgium.
authors.forename: Karel
authors.initials: K
authors.lastname: Lambert
authors.forename: Richard K
authors.initials: RK
authors.lastname: Capek
authors.forename: Maryna I
authors.initials: MI
authors.lastname: Bodnarchuk
authors.forename: Maksym V
authors.initials: MV
authors.lastname: Kovalenko
authors.forename: Dries
authors.initials: D
authors.lastname: Van Thourhout
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Heiss
authors.forename: Zeger
authors.initials: Z
authors.lastname: Hens