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Electrodeposition of Amino‐Functionalized Particles in a pH Gradient: Quantitative Investigations Employing an Electrochemical Quartz Crystal Microbalance
Author(s) -
Bünsow Johanna,
Grabs IlkaMarina,
SchmidtNaake Gudrun,
Johannsmann Diethelm
Publication year - 2009
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200950116
Subject(s) - quartz crystal microbalance , miniemulsion , materials science , polystyrene , electrochemistry , electrode , chemical engineering , polymer , polymerization , polymer chemistry , adsorption , composite material , chemistry , organic chemistry , engineering
The electrodeposition of amino‐functionalized polystyrene and polybutylacrylate particles onto a gold electrode was investigated by an electrochemical quartz crystal microbalance (EQCM) and by AFM imaging. Particles with diameters in the range of 100 nm were prepared by miniemulsion polymerization. An electrochemical pH modulation in front of the electrode induced the neutralization of the amino groups and the particles readily precipitated onto the surface. The efficiency of the deposition was a function of the applied voltage, of the particles' softness, and of the amino content of the particles. Depending on the polymer composition, the coatings consisted of a dense array of individual miniemulsion particles or of a smooth polymer surface produced by coalescence.