MATEC Web of Conferences
Volume 4, 2013ICOMF14 – 14th International Conference on Organized Molecular Films (LB 14)
|Number of page(s)||4|
|Section||Self-Assembly and Nanoscale Organization|
|Published online||13 August 2013|
Investigation of the effects caused by applying voltage in Layer-by-Layer self-assembly method
1 Graduate School of Science and Technology, Keio Univ., 3-14-1 Hiyoshi, Kohoku-ku, Yokohama-shi, kanagawa-ken 223-8522, Japan
2 Department of Ceramic Engineering, Kangnung-wonju National Univ., 123 Jibyeon-dong, Kangwon-do 210-702, Korea
Recently, Layer-by-Layer (LbL) self-assembly method under applied voltage (voltage-applied LbL) attracts great attention. It is reported that the method enables more abundant film adsorption than conventional LbL method. However, a small proportion of experimental results about adsorption of polyelectrolytes by voltage-applied LbL have been reported. In this study, voltage-applied LbL method using weakly charged polyelectrolytes was examined. Poly (allylamine hydrochloride) (PAH) and Poly (ethylene imine) (PEI) as cationic solutions and Poly (acrylic acid) (PAA) as anionic solution were chosen. The pH of solutions was adjusted to several conditions and film of PAH/PAA and film of PEI/PAA were fabricated by voltage-applied LbL method. Change of adsorption behavior and film morphology by applying voltage depended on pH condition of solutions. When pH of PAH/PAA solutions was 3.9/3.8, respectively, the film adsorption was accelerated by applying voltage. Moreover, in this condition, the surface morphology remarkably changes and texture structure appears by applying voltage. Consequently, it was found that applying voltage in LbL method was effective in controlling film adsorption and the surface nano structure.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.