the wagner group

Rose Ndong

Curriculum Vitae
B.A. Chemistry, 2005
Mount Holyoke College, South Hadley, MA

B.S. Chemical Engineering, 2006
University of Massachusetts Amherst, Amherst, MA

Ph.D. Chemical Engineering, 2012
Princeton University, Princeton, NJ

office: 045 CLB
phone: 302-831-6738

Phase Diagram of Model Adhesive Hard Ellipsoids Systems

Colloidal dispersions have wide industrial applications ranging from cosmetics to pharmaceuticals. Gel formation is particularly important and therefore, developing a fundamental understanding of the phase behavior and dynamical arrest transitions, such as gelation and glass formation for model systems is critical. Recently, such a state diagram has been constructed for the simplest, fundamental system, that of adhesive hard spheres (AHS), by combining state-of-the-art simulations and experiments on a model dispersion. However, many systems of interest (such as proteins, crystalline particles, minerals, etc.) contain anisometric particles, and as such, it is important to establish a state diagram for adhesive hard ellipsoids. Here, we propose to extend the previous work on AHS to an anisotropic system. Anisotropic particles are of particular importance as they impart elasticity and solid-like rheological properties at lower volume fractions than their isotropic counterparts. Combining rheology, small angle neutron scattering (SANS) and fiber-optics quasi-elastic light scattering (FOQELS), we aim to construct the fluid-gel transition of adhesive hard silica-coated titania elispoids as a function of particle volume fraction and strength of attraction.