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Periodic Swelling and Collapse of Polyelectrolyte Brushes Driven by Chemical Oscillation.
- Source :
-
Journal of Physical Chemistry B . Jul2008, Vol. 112 Issue 33, p10137-10141. 5p. - Publication Year :
- 2008
-
Abstract
- Poly(acrylic acid) (PAA) chains exhibit conformational change in response to pH, whereas bromate−sulfite−ferrocyanide (BSF) solution shows pH oscillation between 3.2 and 6.6. By use of quartz crystal microbalance with dissipation (QCM-D), we have investigated the pH induced conformational change of PAA brushes under a continuous flow of BSF solution in real time. The changes in frequency and dissipation clearly indicate the periodic swelling and collapse of brushes with pH oscillation. The changes in thickness, viscosity, and elastic modulus further indicate the oscillation of the interface. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15206106
- Volume :
- 112
- Issue :
- 33
- Database :
- Academic Search Index
- Journal :
- Journal of Physical Chemistry B
- Publication Type :
- Academic Journal
- Accession number :
- 34441727
- Full Text :
- https://doi.org/10.1021/jp801533r