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Quantitative analysis on the adsorbed amount and structural characteristics of spin self-assembled multilayer films

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Authors
Cho, Jinhan; Lee, Seung-Heon; Kang, Huiman; Char, Kookheon; Koo, Japil; Seung, Byoung Hoon; Lee, Ki-Bong
Issue Date
2003-07-08
Publisher
Elsevier
Citation
Polymer 2003;44:5455
Keywords
Layer-by-layer filmsSpin self-assemblyX-ray reflectivity
Abstract
In this study, we demonstrate that the adsorbed amount of respective layers in spin self-assembled multilayer films can be controlled and predictable using an empirical power-law equation in terms of spin speed and initial solution concentration. The amount of a pair of polyelectrolytes deposited per bilayer rapidly increases with increasing polyelectrolyte concentration up to 12.5 mM while the solution concentration above 16 mM has no appreciable effect on the adsorbed amount. The adsorbed film thickness per bilayer is shown to be easily controlled from about 5 to 40 Å and proportional to constant power exponents of −0.34 and 0.78 with respect to the spinning speed (Ω) and the mole concentration of polyelectrolytes, respectively. We also demonstrate with synchrotron X-ray reflectivity measurement that the alternating organic/inorganic ultrathin films fabricated by the spin self-assembly process contain highly ordered internal structure and retain unique optical characteristics determined by the boundary condition at both the substrate/multilayer film interface as well as the multilayer/air interface.
ISSN
0032-3861
Language
English
URI
http://hdl.handle.net/10371/5860
DOI
https://doi.org/10.1016/S0032-3861(03)00504-4
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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