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Elasticity and clustering in concentrated depletion gels | | S Ramakrishnan
; Y-L Chen
; K S Schweizer
; C F Zukoski
; | | Date: |
30 Sep 2004 | | Journal: | Phys Rev E, 70 (4 Pt 1), 040401 | | Abstract: | X-ray scattering and rheology are employed to study the volume fraction dependence of the collective structure and elastic moduli of concentrated nanoparticle-polymer depletion gels. The nonequilibrium gel structure consists of locally densified nonfractal clusters and narrow random interfaces. The elastic moduli display a power law dependence on volume fraction with effective exponents that decrease with increasing depletion attraction strength. A microscopic theory that combines local structural information with a dynamic treatment of gelation is in good agreement with the observations. | | Source: | PubMed, pmid15600386 | | Services: | Forum | Review | Favorites | |
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