Influence of Surfactant Counterions during Electrophoretic Particle Deposition

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• 作者：Cé ; line Pignolet ; Claudine Filiâ ; tre ; Alain Foissy
• 刊名：Langmuir
• 出版年：2008
• 出版时间：September 16, 2008
• 年：2008
• 卷：24
• 期：18
• 页码：10181-10186
• 全文大小：305K
• 年卷期：v.24,no.18(September 16, 2008)
• ISSN：1520-5827

文摘

This study demonstrates the influence of a cationic surfactant on colloidal particle electrodeposition (migration and adhesion). Three cetyltrimethylammonium salts (CTA⁺) with various counterions (bromide, chloride, and hydrogenosulphate) were studied. Particle transport toward the electrode was driven by the electrophoretic force. Once particles reached the electrode, a wide variety of behaviors were observed, depending on surfactant concentration and counterions: particles would stick permanently or slide along the electrode surface, remain or detach upon potential switching, act as nuclei for aggregate growth, or produce a homogeneous particle film. The experimental results also demonstrate the specific influence of surfactant counterions on the deposited film morphology.