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Bimodal colloid gels of highly size-asymmetric particles.

Authors
  • Lee, Jooyoung
  • Lee, Seong Jae
  • Ahn, Kyung Hyun
  • Lee, Seung Jong
Type
Published Article
Journal
Physical Review E
Publisher
American Physical Society (APS)
Publication Date
Jul 01, 2015
Volume
92
Issue
1
Pages
12313–12313
Identifiers
PMID: 26274168
Source
Medline
License
Unknown

Abstract

We report a type of colloidal gel, induced by a minute incremental addition of mutually attractive small particles (size ∼12 nm) to a suspension of highly charged large particles (size ∼500 nm). The gel's morphological behavior does not follow the typical power-law scaling for fractal clusters. Its unique scaling behavior has two distinct power-law indices, based on particle volume fraction. We show the unique scaling behavior arises when nonfractal networks of large particles are bridged by small-particle clusters, which occurs between a lower and upper critical boundary of small particle volume fraction.

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