Specific ζ-Potential Response of Layer-by-Layer Coated Colloidal Particles Triggered by Polyelectrolyte Ion Interactions

被引：46

作者：

Irigoyen, J. ^{[1
,4
]}

Moya, S. E. ^{[1
]}

Iturri, J. J. ^{[1
]}

Llarena, I. ^{[1
]}

Azzaroni, O. ^{[2
]}

Donath, E. ^{[3
]}

机构：

[1] CIC biomaGUNE, San Sebastian 20006, Guipuzcoa, Spain

[2] Univ Nacl La Plata, CONICET La Plata, INIFTA, La Plata, Buenos Aires, Argentina

[3] Univ Leipzig, Fac Med, Inst Biophys & Med Phys, Leipzig, Germany

[4] FideNa PrincipiaTech Navarra, Navarra 31006, Spain

来源：

LANGMUIR | 2009年 / 25卷 / 06期

关键词：

MULTILAYER FILMS; COUNTERIONS; BRUSHES; GROWTH; WATER;

D O I：

10.1021/la803360n

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The zeta-potential of PSS/PAH and PSS/PDADMAC coated silica particles was studied in the presence of CIO4- and H2PO4- salts. In the presence of CIO4-, layer-by-layer (LbL) coated silica particles with PDADMAC as the top layer show a reversal in the surface charge with increasing salt concentration but remain positive in phosphate solutions. LbL particles with PAH as the top layer become, however, negative in the presence of H2PO(4)(-) but retain their positive charge in the presence of CIO4-. Charge reversal was explained by specific interaction of CIO4- ions with the quaternary amine groups and of H2PO4- with the primary amines through hydrogen bonding. Atomic force microscopy (AFM) and quartz crystal microbalance with dissipation (QCM-D) were employed to study the corresponding layer stability on planar surfaces.

引用

页码：3374 / 3380

页数：7

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