Abstract
The volume fraction dependence of the collective structure and elastic moduli of concentrated nanoparticle-polymer depletion gels was investigated using X-ray scattering and rheology. The nonequilibrium gel structure under investigation consisted of locally densified nonfractal clusters and narrow random interfaces. An ultrasmall angle x-ray scattering (USAXS) of nanoparticle collective structure factor was performed over reduced polymer concentrations. An elastic moduli at 1 Hz as a function of volume fraction for fixed reduced polymer concentration was also observed. The results show that the elastic moduli display a power law dependence on volume fraction with effective exponents which decrease with increasing depletion attraction strength.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4 |
| Number of pages | 1 |
| Journal | Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics |
| Volume | 70 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2004 |
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics