21 April 2016 The study of the formation of monolayers of quantum dots at different temperatures
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Abstract
The process of formation of Langmuir monolayers of quantum dots at the different subphase temperatures was studied by means of compression isotherm, Brewster angle microscopy and transmission electron microscopy. The increasing of the maximum surface pressure from 32 to 44 mN/m takes place with decreasing the temperature from 34 to 11°C. This is due to a decrease in the rate of dissolution of surfactant molecules in water. The increasing of a filling degree of monolayer by the quantum dots and increasing of it uniformity in thickness takes place in this temperature range. The area of bilayer and multilayer film of quantum dots decreasing and the area of quantum dots monolayer is increasing. This change explained by the difference in the phase condition of oleic acid molecules, which stabilized quantum dots.
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Ilya A. Gorbachev, Irina Y. Goryacheva, Gerald Brezesinski, Evgeny G. Gluhovskoy, "The study of the formation of monolayers of quantum dots at different temperatures", Proc. SPIE 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS), 99171J (21 April 2016); doi: 10.1117/12.2228455; https://doi.org/10.1117/12.2228455
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