Process of making hydrophobic metal oxide nanoparticles

Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing

Reexamination Certificate

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C423S325000, C423S625000, C423S609000, C423S610000, C423S263000, C423S607000, C423S608000, C423S622000, C423S618000, C423S632000, C423S635000, C423S605000, C423S594190, C423S604000, C423S594900, C430S058050, C430S058100, C430S058200, C428S357000, C428S402000, C428S405000, C977S773000, C977S811000, C399S159000

Reexamination Certificate

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07081234

ABSTRACT:
A process of treating metal oxide nanoparticles that includes mixing metal oxide nanoparticles, a solvent, and a surface treatment agent that is preferably a silane or siloxane is described. The treated metal oxide nanoparticles are rendered hydrophobic by the surface treatment agent being surface attached thereto, and are preferably dispersed in a hydrophobic aromatic polymer binder of a charge transport layer of a photoreceptor, whereby π—π interactions can be formed between the organic moieties on the surface of the nanoparticles and the aromatic components of the binder polymer to achieve a stable dispersion of the nanoparticles in the polymer that is substantially free of large sized agglomerations.

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