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  • Title: Elasticity and critical bending moment of model colloidal aggregates.
    Author: Pantina JP, Furst EM.
    Journal: Phys Rev Lett; 2005 Apr 08; 94(13):138301. PubMed ID: 15904044.
    Abstract:
    The bending mechanics of singly bonded colloidal aggregates are measured using laser tweezers. We find that the colloidal bonds are capable of supporting significant torques, providing a direct measurement of the tangential interactions between particles. A critical bending moment marks the limit of linear bending elasticity, past which small-scale rearrangements occur. These mechanical properties underlie the rheology and dynamics of colloidal gels formed by diffusion-limited cluster aggregation, and give critical insight into the contact interactions between Brownian particles.
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