Organic versus Hybrid Coacervate Complexes : Co-Assembly and Adsorption Properties
| dc.creator | Qi, Ling | |
| dc.creator | Chapel, Jean-Paul | |
| dc.creator | Castaing, Jean-Christophe | |
| dc.creator | Fresnais, Jerome | |
| dc.creator | Berret, Jean-Francois | |
| dc.date | 2007-12-04 | |
| dc.date.accessioned | 2026-07-07T08:47:12Z | |
| dc.date.available | 2026-07-07T08:47:12Z | |
| dc.description | We report the co-assembly and adsorption properties of coacervate complexes made from polyelectrolyte-neutral block copolymers and oppositely charged nanocolloids. The nanocolloids put under scrutiny were ionic surfactant micelles and highly charged 7 nm cerium oxide (CeO2) nanoparticles. Static and dynamic light scattering was used to investigate the microstructure and stability of the organic and hybrid complexes. The microstructure of the CeO2-based complexes was resolved using cryogenic transmission electronic microscopy (Cryo-TEM), and it revealed that the cores were clusters made from densely packed nanoparticles. In the concentration range of interest, c = 10-4 - 1 wt. %, the surfactant-based complexes were shown to exhibit a critical association concentration (cac) whereas the nanoparticle-polymer hybrids did not. The adsorption properties of the same complexes were investigated above the cac by stagnation point adsorption reflectometry. The adsorbed amount was measured as a function of time for polymers and complexes using anionically charged silica and hydrophobic poly(styrene) substrates. It was found that all complexes adsorbed readily on both types of substrates up to a level of 1 - 2 mg m-2 at stationary state. Upon rinsing however, the adsorbed layer was removed for the surfactant-based systems, but not for the cerium oxide clusters. As for the solution properties, these finding were interpreted in terms of a critical association concentrations which are very different for organic and hybrid complexes. | |
| dc.description | 9 pages in templated form, 9 figures, paper submitted to Soft Matter | |
| dc.identifier | https://arxiv.org/abs/0712.0475 | |
| dc.identifier | http://arxiv.org/abs/0712.0475 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/143512 | |
| dc.subject | Materials Science | |
| dc.subject | Soft Condensed Matter | |
| dc.title | Organic versus Hybrid Coacervate Complexes : Co-Assembly and Adsorption Properties | |
| dc.type | text |