Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-09-08
THE JOURNAL OF CHEMICAL PHYSICS 133, 104501 (2010)
Physics
Condensed Matter
Soft Condensed Matter
25 pages, 4 figures
Scientific paper
10.1063/1.3487523
We have measured the phase behavior of a binary mixture of like-charged colloidal spheres with a size ratio of 0.9 and a charge ratio of 0.96 as a function of particle number density n and composition p. Under exhaustively deionized conditions the aqueous suspension forms solid solutions of body centered cubic structure for all compositions. The freezing and melting lines as a function of composition show opposite behavior and open a wide, spindle shaped coexistence region. Lacking more sophisticated treatments, we model the interaction in our mixtures as an effective one-component pair energy accounting for number weighted effective charge and screening constant. Using this description, we find that within experimental error the location of the experimental melting points meets the range of melting points predicted for monodisperse, one component Yukawa systems made in several theoretical approaches. We further discuss that a detailed understanding of the exact phase diagram shape including the composition dependent width of the coexistence region will need an extended theoretical treatment.
Lorenz Nina J.
Palberg Thomas
No associations
LandOfFree
Melting and Freezing Lines for a Mixture of Charged Colloidal Spheres with Spindle-Type Phase Diagram does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Melting and Freezing Lines for a Mixture of Charged Colloidal Spheres with Spindle-Type Phase Diagram, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Melting and Freezing Lines for a Mixture of Charged Colloidal Spheres with Spindle-Type Phase Diagram will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-32487