Abstract
The image formation and the resolution of a self-contained electrophoretic x-ray imager have been investigated. The electrophoretic suspension contained pigments and counterions, ionic surfactants, and extraneous charges. Rate equations have been formulated to describe the transport properties of the ionic surfactants from the low to high field regions. The electrical transport properties of the electrophoretical suspension were investigated in relation to x-ray image formation using three different modes of operation: the pulse, the biased-pulse, and the universal modes. The reflectance versus charge curves of the x-ray images were qualitatively explained. Both negative- and positive-mode x-ray images of 22×22 cm2 have been demonstrated with two different electrophoretic suspensions. The imager can achieve x-ray images of high resolution and large area at the same time.