pH-Responsive Microrods Produced by Electric-Field-Induced Aggregation of Colloidal Particles

Poly(2‐vinylpyridine) microgel particles and polystyrene latex are aggregated in an alternating electric field to produce a new class of microrods. An electric field simultaneously accelerates the aggregation of oppositely charged particles, and templates the aggregates into linear structures. Rods...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2007-06, Vol.19 (11), p.1523-1527
Main Authors: Snoswell, D. R. E., Brill, R. K., Vincent, B.
Format: Article
Language:English
Subjects:
Aggregation
Colloids
Microgels
Microrods
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Summary:Poly(2‐vinylpyridine) microgel particles and polystyrene latex are aggregated in an alternating electric field to produce a new class of microrods. An electric field simultaneously accelerates the aggregation of oppositely charged particles, and templates the aggregates into linear structures. Rods up to 100 μm in length can be reversibly extended by 20 % by a change in solution pH because of the swelling properties of the microgel particles (see figure).
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200601824