Additive Manufacturing of Cobalt-Based Organic Ferromagnetic Materials

Abstract

Clogging problems from the aggregation of dispersed solutes have hindered the successful application of inkjet printing for patterning ferromagnetic materials. Native ferromagnetic ink with complete solubility and proper surface tension for inkjet printing has been lacking. Here, we report a metal-organic molecule with absolute solubility in dimethylformamide (DMF) solvent, which can be successfully patterned using state-of-art inkjet printing technologies. The jetting parameters for this ferromagnetic ink were systemically optimized and a series of patterns were successfully made on a variety of substrates. These patterned ferromagnetic 2.5-dimensional structures showed ferromagnetic properties as experimentally verified. © 2010-2012 IEEE.