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Nanoscale phenomena at fluid interfaces

Nanoscale phenomena at fluid interfaces. Bruce M. Law Physics Department KSU. Catalytic poisoning PRL 76 ,3380 (1996). S adsorption. H 2. H. H. H 2. Pd. Detergents. Surfactants. Oil recovery (microemulsions). Microfluidics. Biofouling of channels. Gibb’s Adsorption equation.

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Nanoscale phenomena at fluid interfaces

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  1. Nanoscale phenomenaat fluid interfaces Bruce M. Law Physics Department KSU

  2. Catalytic poisoning • PRL 76,3380 (1996) S adsorption H2 H H H2 Pd Detergents • Surfactants Oil recovery (microemulsions) • Microfluidics Biofouling of channels Gibb’s Adsorption equation Importance?

  3. PRL 83, 772 (1999) PRE 59, 5655 (1999) Strong Adsorption Finite Size Effect L Vapor Vapor Glass z v (z) ~ P(z) Dipole Orientation Weak Adsorption 2NC Vapor Vapor z z a2 (z) ~ Y(z) v (z) ~ G(z,Ds) PRL 89, 146101 (2002) PRL 86, 2070 (2001) Vapor Binary Liquid Mixture : Component A : Component B

  4. Strong Adsorption Finite Size Effect L Vapor Vapor Glass z v (z) ~ P(z) Dipole Orientation Weak Adsorption Vapor Vapor z z a2 (z) ~ Y(z) v (z) ~ G(z) Vapor Binary Liquid Mixture : Component A : Component B

  5. Adsorption of complex fluids • Biofluids – protein, enzyme solutions Substrate

  6. Nanoparticle solution self-assembly A 3d superlattice of gold nano-particles coated with a HSC12H25 thiol layer.

  7. Smart surfaces = surface properties change with external field

  8. Potential collaborations: • Complex fluids eg. bio/nano fluids • Smart surfaces • Surface modifications • Smart fluids • … Surface properties: • Adsorption • Adhesion • Surface self-assembly • Surface slip • …

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