electrokin_lec5

electrokin_lec5 - Key Concepts for section IV...

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1: Debye layer, Zeta potential, Electrokinetics 2: Electrophoresis, Electroosmosis 3: Dielectrophoresis 4: Inter-Debye layer force , Van-Der Waals force 5: Coupled systems, Scaling, Dimensionless Numbers Goals of Part IV: (1) Understand electrokinetic phenomena and apply them in (natural or artificial) biosystems (2) Understand various driving forces and be able to identify dominating forces in coupled systems Key Concepts for section IV (Electrokinetics and Forces)
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Motion of particles in E and B field. Motion of (bio) Particles in Electric and Magnetic field Electrophoresis Motion of charged particles in an electric field Dielectrophoresis Motion of (neutral) particles in an electric field gradient Magnetophoresis Motion of magnetic particles (with magnetic dipole) in a magnetic field
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Simple electric dipole Electric dipole 3 0, ( ) 4 net rp Qr r πε = r r r () rd >> + - Q -Q d ˆ p Qdz = r ˆ z Dipole in uniform electric field Dipole in non-uniform electric field - + - - + - + + - - - + - - +
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Induced dipole E 0 θ z σ o , ε σ i , ε { 0 0 0 3 0 0 2 0 external field
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electrokin_lec5 - Key Concepts for section IV...

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