| 초록 |
When a colloidal solution is stimulated with an electric field, the nanoparticles (NPs) are deposited on the electrodes in a process known as electrophoretic deposition (EPD). Because the effectiveness of film production is linked to understanding NP kinetics during EPD, real-time in situ analysis using light scattering was employed to monitor NP dynamics by creating a customized liquid cell. The directions of NP dynamics were perpendicular to the electrode surface and symmetric from the center between two cylindrical electrodes within the first 10 s after the electric field was introduced. With deposition time increase, the symmetric dynamics became less evident, resulting in feeble NP deposition as the less-ordered dynamics became stronger. Because less-ordered dynamics made NP deposition difficult, two separate deposition mechanisms emerged when the deposition rate changed from 0.16 to 0.02 m/s in 30 s. In addition, in a cross-sectional image of the liquid cell, the NP motion between the two cylindrical electrodes displayed rotating dynamics. The in situ observations provide insights on the deposition mechanism and dynamics of NPs in a solution in the presence of electric field. |
