کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1555506 999053 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reversible gels of patchy particles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
پیش نمایش صفحه اول مقاله
Reversible gels of patchy particles
چکیده انگلیسی

In the last years a significant progress in the understanding of the aggregation properties of patchy colloidal particles and of the process of formation of equilibrium gels has taken place. We discuss here how the number of patches (a variable which can be experimentally controlled in current synthesis procedures) affects the equilibrium phase diagram and the relative stability against decomposition into two phases with different colloidal concentration, the analog of the gas–liquid phase separation in simple liquids. For small number of patches, the liquid phase exists as an equilibrium state down to small temperatures, giving rise to empty liquids and equilibrium gels. Finally, we discuss the connection between irreversible and reversible gelation in this class of colloidal systems proposing a conceptual link between elapsed time during the aggregation kinetics and temperature in thermodynamic equilibrium.


► Patchiness offers a powerful tool to control self-assembly of colloidal particles.
► Valence controls the colloid-rich colloid-poor phase separation.
► Limited valence patchy particles form equilibrium gels.
► A connection between irreversible and reversible gelation is established for small valence patchy colloids.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Opinion in Solid State and Materials Science - Volume 15, Issue 6, December 2011, Pages 246–253
نویسندگان
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