Studying of Quantum Dots Langmuir Monolayers Stability at the Different Subphase Temperature

• Published in: BioNanoScience Vol. 7; no. 4; pp. 686 - 691
• Main Authors: Gorbachev, Ilya A., Shtykov, Sergey N., Brezesinski, Gerald, Glukhovskoy, Evgeny G.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2017; Springer Nature B.V
• Subjects: Biological and Medical Physics; Biomaterials; Biophysics; Cadmium sulfide; Circuits and Systems; Compression; Diffusion layers; Diffusion rate; Engineering; Fluid dynamics; Langmuir-Blodgett films; Monolayers; Nanotechnology; Quantum dots; Temperature; Temperature effects; Thickness; Turbulence; Zinc sulfide; Compression isotherm of quantum dots; Stability of quantum dot Langmuir monolayers; Langmuir monolayers; Quantum dots; Monolayer stability
• DOI: 10.1007/s12668-017-0404-4
• ISSN: 2191-1630

The monolayer of CdSe/CdS/ZnS quantum dots was formed on the water surface at 11, 21, and 31 °C and studied by compression isotherms. Increasing subphase temperature increases the lift-off point of the monolayer and decreases the minimum area which can be reached on compression. Compression changes the monolayer state from LE to LC. The highest compression state can be reached at the lowest subphase temperatures. Increasing water subphase temperature leads to increasing homogeneity of the monolayers. Increasing subphase temperature leads to increasing quiescent layer thickness and diffusion rate. At the high subphase temperature, a duration of collective flowing of desorption processes from water interface to quiescent layer and from quiescent layer to turbulent layer is decreasing that connected with reaching a quiescent layer with which the saturation does not take a place at the achieved diffusion rate.