Tuesday, September 15, 2009

US Patent 7588872 - CNT photoreceptor


This is one of a series of patents from Xerox which teaches that carbon nanotubes are useful to enhance the imaging properties of photoreceptive sheets which are important to laser printers. Claim 1 reads:

1. An electrophotographic imaging member comprising:

a substrate,

an optional intermediate layer,

a photogenerating layer that performs both charge generating and hole transport functions, and

an optional overcoating layer,

wherein the photogenerating layer comprises a carbon nanotube material that is from about 0.1 to about 50 nanometers in diameter and from about 0.01 to about 500 micrometers in length;

and the photogenerating layer contains about 5 to about 20 percent by weight carbon nanotube material.