Langmuir-Schaefer deposition of quantum dot multilayers

Langmuir : the ACS Journal of Surfaces and Colloids
Karel LambertZeger Hens

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.

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Citations

Jul 9, 2010·Journal of the American Chemical Society·Bernd FritzingerZeger Hens
Jan 19, 2011·The Journal of Chemical Physics·Andrew R AttarKenneth L Knappenberger
Oct 21, 2011·Angewandte Chemie·Karel LambertZeger Hens
Feb 20, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·R S HidalgoM Mercedes Velázquez
Mar 14, 2018·Optics Express·Suzanne BisschopEdouard Brainis
Apr 20, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Jimmie Mitchell, Jeffrey J Weimer
Jul 31, 2018·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Houman Bahmani JalaliSedat Nizamoglu

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