Metal Electrophotography

Figure 6.6 The principle of electrophotography. The heart of the machine consists of a thin semiconductor layer (Sc) on a metal drum (M). Opposite electrical charges are formed by a corona discharge (1)3 then these charges recombine through photoconduction in the irradiated areas (2). The remaining electrically charged areas are sprinkled with electrically charged ink (3)...

The metal-insulator—semiconductor (MIS) structure is employed in the heterophase blocking where the thickness of the insulator used is the key factor in satisfying the blocking requirement. Differently from the solar cell with MIS structure, in which an insulating film tens of angstroms thick is used to avoid the back-diffusion of photoinduced carriers (Wronski et al., 1981), the photoreceptor of electrophotography has necessarily a rather thick insulating film to block carrier transport. 

In ion-flow electrophotography (Snelling, 1965 Pressman, 1974). a photoreceptor is coated onto a metal screen and then placed between a corona and a dielectric receiver. Exposed regions of the screen then become conductive and permit corona ions to pass to the receiver while nonexposed regions become... 

Complexes 431 of Group IB or VIII metals with 1,5-naphthyridine derivatives 432 were synthesized (1993GEP4105386). Compounds 431 are used for the preparation of singlet oxygen. These serve as sensitizers in photoinitiation of polymerases and electrophotography and as redox catalysts in organic reactions. 

Uses Pigment for cosmetics, sunscreens, automotive paints/coatings, other metallic paints, fillers for magnetic tapes/floppy disks/UV-shielding paints/inks/plastics, additives forfire retardants and electrophotography toners... 

Resins for high-speed electrophotography Metal primer Electrophotographic films Glossy, aqueous paints Metal... 

Polymers and polymer composites have been increasinqly used in place of metals for various industries namely, aerospace, automotive, bio-medical, computer, electrophotography, fiber, and rubber tire. Thus, an understanding of the interactions between polymers and between a polymer and a rigid counterface can enhance the applications of polymers under various environments. In meeting this need, polymer tribology has evolved to deal with friction, lubrication and wear of polymeric materials and to answer some of the problems related to polymer-polymer interactions or oolymer-rigid body interactions. 

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