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Volume: 55 | Article ID: art00009
Evanescent Wave Based System for Observing Particle-Substrate-Charge Interactions
  DOI :  10.2352/J.ImagingSci.Technol.2011.55.3.030506  Published OnlineMay 2011

A system using interaction of evanescent light waves with particles in a liquid allows one to observe accumulation, stability, and adhesion of such particles at and in the vicinity of a surface. Accumulation can be due to electrophoresis, sedimentation, or equilibration of the substrate surface with the bulk solution. The observation is sensitive only to particles within 1 μm of the interface, so it can be made with an arbitrary thickness of fluid. Evanescent wave absorption is monitored adjacent to an indium tin oxide coated glass slide affixed to a high index prism. The test fluid can be either constrained by a secondary metal electrode or left as a free fluid film. In the latter case a free charge can be injected into the system from an external charge generator allowing one to separate field- and charge-induced effects. This system is ideal for investigating device life limiting interactions between colorants and substrates in displays.

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Henryk Birecki, Thomas Anthony, "Evanescent Wave Based System for Observing Particle-Substrate-Charge Interactionsin Journal of Imaging Science and Technology,  2011,  pp 30506-1 - 30506-4,

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Copyright © Society for Imaging Science and Technology 2011
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