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Light Enhanced Adhesion of Photoactive Particles

IP.com Disclosure Number: IPCOM000122343D
Original Publication Date: 1991-Nov-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 29K

Publishing Venue

IBM

Related People

Diaz, AF: AUTHOR [+3]

Abstract

Light exposure of a layer of photoactive toner particles on an appropriately biased electrode can be made to selectively adhere. Imaging is accomplished by subsequently removing the unirradiated particles. A layer of neutral or weakly charged photoactive ZnO/dye/polymer toner on a copper electrode with a negative bias will strongly adhere to the surface when illuminated in the presence of an electric field. The attraction between the particles and the surface is electrostatic and is a result of photo-induced charge transfer between the two materials. In this manner, a latent image can be produced which, after removal of the nonexposed toner, produces a toned image which is subsequently transferred to paper or foils.

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Light Enhanced Adhesion of Photoactive Particles

      Light exposure of a layer of photoactive toner particles on an
appropriately biased electrode can be made to selectively adhere.
Imaging is accomplished by subsequently removing the unirradiated
particles.  A layer of neutral or weakly charged photoactive
ZnO/dye/polymer toner on a copper electrode with a negative bias will
strongly adhere to the surface when illuminated in the presence of an
electric field.  The attraction between the particles and the surface
is electrostatic and is a result of photo-induced charge transfer
between the two materials.  In this manner, a latent image can be
produced which, after removal of the nonexposed toner, produces a
toned image which is subsequently transferred to paper or foils.

      Disclosed anonymously.