This title appears in the Scientific Report :
2003
Please use the identifier:
http://dx.doi.org/10.1107/S0021889803000256 in citations.
Please use the identifier: http://hdl.handle.net/2128/2857 in citations.
Use of anomalous small-angle X-ray scattering for the investigation of highly charged colloids
Use of anomalous small-angle X-ray scattering for the investigation of highly charged colloids
We present a study of the radial structure of a spherical polyelectrolyte brushes by anomalous small-angle X-ray scattering. The spherical polyelectrolyte brushes consist of a solid poly( styrene) core of ca : 100 nm diameter onto which long linear chains of poly( acrylic acid) (PAA) are densely gra...
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Personal Name(s): | Dingenouts, N. |
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Merkle, R. / Guo, X. / Narayanan, T. / Goerigk, G. / Ballauff, M. | |
Contributing Institute: |
Streumethoden; IFF-STM |
Published in: | Journal of applied crystallography, 36 (2003) S. 578 - 582 |
Imprint: |
Copenhagen
Munksgaard
2003
|
Physical Description: |
578 - 582 |
DOI: |
10.1107/S0021889803000256 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Journal of Applied Crystallography
36 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/2857 in citations.
We present a study of the radial structure of a spherical polyelectrolyte brushes by anomalous small-angle X-ray scattering. The spherical polyelectrolyte brushes consist of a solid poly( styrene) core of ca : 100 nm diameter onto which long linear chains of poly( acrylic acid) (PAA) are densely grafted. A sufficiently high pH, these polyelectrolyte chains are fully charged. Rubidium ions are used as counterions because their adsorption edge (15 199.6 eV) can be conventiently reached by synchrotron radiation. By performing small-angle X-ray scattering studies at different energies of the incident radiation, the contribution of the Rb+ counterions can be analyzed separately. The scattering contribution of the counterions can be derived and compared to the scattering intensity of the entire particle. The distributions of the macro-ion and of the counterions are shown to be very similiar. This shows that the counterions must be confined within the brush. |