Structure of multi-component colloidal lattices at oil-water interfaces

Huan Ma; Lenore Dai

doi:10.1021/la9021036

Structure of multi-component colloidal lattices at oil-water interfaces

Huan Ma, Lenore Dai

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

We have successfully assembled two-component S-PS/AS-PS (sulfate-treated polystyrene/aldehyde sulfate-treated polystyrene) and three-component S-PS/AS-PS/C-PS (sulfate-treated polystyrene/aldehyde sulfate-treated polystyrene/carboxylate-treated polystyrene) colloidal lattices at poly(dimethylsiloxane)-water interfaces. The colloidal particles assemble into long-range-ordered structure and oscillate around their equilibrium positions. Different types of particles distribute randomly in the lattice with no obvious phase separation. In the two-component colloidal lattices, the S-PS particles form mostly sixfold lattice sites, whereas the AS-PS particles largely form fivefold defect sites. The calculated attractive capillary force is stronger for the AS-PS particles, which likely explains their tendency to aggregate compared to the S-PS particles. In addition, we have performed total force calculation and extrapolated the surface charge densities of the particles in the oil phase.

Original language	English (US)
Pages (from-to)	11210-11215
Number of pages	6
Journal	Langmuir
Volume	25
Issue number	19
DOIs	https://doi.org/10.1021/la9021036
State	Published - Oct 6 2009

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la9021036

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abstract = "We have successfully assembled two-component S-PS/AS-PS (sulfate-treated polystyrene/aldehyde sulfate-treated polystyrene) and three-component S-PS/AS-PS/C-PS (sulfate-treated polystyrene/aldehyde sulfate-treated polystyrene/carboxylate-treated polystyrene) colloidal lattices at poly(dimethylsiloxane)-water interfaces. The colloidal particles assemble into long-range-ordered structure and oscillate around their equilibrium positions. Different types of particles distribute randomly in the lattice with no obvious phase separation. In the two-component colloidal lattices, the S-PS particles form mostly sixfold lattice sites, whereas the AS-PS particles largely form fivefold defect sites. The calculated attractive capillary force is stronger for the AS-PS particles, which likely explains their tendency to aggregate compared to the S-PS particles. In addition, we have performed total force calculation and extrapolated the surface charge densities of the particles in the oil phase.",

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AU - Dai, Lenore

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AB - We have successfully assembled two-component S-PS/AS-PS (sulfate-treated polystyrene/aldehyde sulfate-treated polystyrene) and three-component S-PS/AS-PS/C-PS (sulfate-treated polystyrene/aldehyde sulfate-treated polystyrene/carboxylate-treated polystyrene) colloidal lattices at poly(dimethylsiloxane)-water interfaces. The colloidal particles assemble into long-range-ordered structure and oscillate around their equilibrium positions. Different types of particles distribute randomly in the lattice with no obvious phase separation. In the two-component colloidal lattices, the S-PS particles form mostly sixfold lattice sites, whereas the AS-PS particles largely form fivefold defect sites. The calculated attractive capillary force is stronger for the AS-PS particles, which likely explains their tendency to aggregate compared to the S-PS particles. In addition, we have performed total force calculation and extrapolated the surface charge densities of the particles in the oil phase.

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Structure of multi-component colloidal lattices at oil-water interfaces

Abstract

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