(490f) A Composite-Sphere Model for Janus Colloids with Central Force Potentials: Structures, Thermodynamic Properties, and Phase Behavior
AIChE Annual Meeting
2019
2019 AIChE Annual Meeting
Engineering Sciences and Fundamentals
Thermophysical Properties: Complex Systems
Wednesday, November 13, 2019 - 9:20am to 9:36am
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text-indent:.5in;line-height:150%">We construct a
“composite-sphere” model for polyatomic molecules characterized by a group of
spheres that can “polymerize” by assembling into a structured molecule with
prescribed bond lengths. A simplest example is a pair of spheres of species A
and B with hard-core diameters dAand dB that can form a
dimer (a dumbbell molecule) with bond length LAB such that LAB < dA
+ dB (fused spheres). LAB can assume arbitrary value so as to produce the desired
dimeric molecule that can be either a tangent disphere or a fused disphere. In the limit LAB " times new roman mso-char-type:symbol> symbol;mso-symbol-font-family:Wingdings">à black"> δ (very small but >0), the dumbbell approaches the Janus-type
colloidal particle. Since we preserve
the central forces as the interactions of these moieties, the isotropic
Ornstein-Zernike equation can be use. An
accurate closure relation is applied. We
shall present the structure, thermodynamic properties and phase diagrams of
such colloids. line-height:150%"> line-height:150%">Reference:
bold">Lloyd L. Lee, Giuseppe Pellicane “Towards composite spheres as
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“composite-sphere” model for polyatomic molecules characterized by a group of
spheres that can “polymerize” by assembling into a structured molecule with
prescribed bond lengths. A simplest example is a pair of spheres of species A
and B with hard-core diameters dAand dB that can form a
dimer (a dumbbell molecule) with bond length LAB such that LAB < dA
+ dB (fused spheres). LAB can assume arbitrary value so as to produce the desired
dimeric molecule that can be either a tangent disphere or a fused disphere. In the limit LAB " times new roman mso-char-type:symbol> symbol;mso-symbol-font-family:Wingdings">à black"> δ (very small but >0), the dumbbell approaches the Janus-type
colloidal particle. Since we preserve
the central forces as the interactions of these moieties, the isotropic
Ornstein-Zernike equation can be use. An
accurate closure relation is applied. We
shall present the structure, thermodynamic properties and phase diagrams of
such colloids. line-height:150%"> line-height:150%">Reference: