| 摘要 |
<p>Water based magnetic colloidal fluids, useable as inks, when prepared by coating chemically precipitated magnetite (Fe3O4) with an adsorption site providing coating agent including certain organic anions, such as sulfates, sulfonates or amino carboxilates, and then dispersing the coated product with non-ionic, anionic or cationic surfactants may exhibit selectably cationic, anionic or non-ionic charge responsiveness.</p> |
