Iron Oxide Nanoparticle-Based Magnetic Ink Development for Fully Printed Tunable Radio-Frequency Devices

Abstract
The field of printed electronics is still in its infancy and most of the reported work is based on commercially available nanoparticle-based metallic inks. Although fully printed devices that employ dielectric/semiconductor inks have recently been reported, there is a dearth of functional inks that can demonstrate controllable devices. The lack of availability of functional inks is a barrier to the widespread use of fully printed devices. For radio-frequency electronics, magnetic materials have many uses in reconfigurable components but rely on expensive and rigid ferrite materials. A suitable magnetic ink can facilitate the realization of fully printed, magnetically controlled, tunable devices. This report presents the development of an iron oxide nanoparticle-based magnetic ink. First, a tunable inductor is fully printed using iron oxide nanoparticle-based magnetic ink. Furthermore, iron oxide nanoparticles are functionalized with oleic acid to make them compatible with a UV-curable SU8 solution. Functionalized iron oxide nanoparticles are successfully embedded in the SU8 matrix to make a magnetic substrate. The as-fabricated substrate is characterized for its magnetostatic and microwave properties. A frequency tunable printed patch antenna is demonstrated using the magnetic and in-house silver-organo-complex inks. This is a step toward low-cost, fully printed, controllable electronic components.

Citation
Vaseem M, Ghaffar FA, Farooqui MF, Shamim A (2018) Iron Oxide Nanoparticle-Based Magnetic Ink Development for Fully Printed Tunable Radio-Frequency Devices. Advanced Materials Technologies: 1700242. Available: http://dx.doi.org/10.1002/admt.201700242.

Acknowledgements
M.V. and F.A.G. contributed equally to this work. The authors acknowledge financial support from King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR). The authors would also like to thank Nini Wei, Shuai Yang, Dr. Alessandro Genovese, Dr. Rachid Sougrat, and Dr. Venkatesh Singaravelu for their work and assistance with SEM, TEM, and magnetic analyses of the powder sample and films.

Publisher
Wiley

Journal
Advanced Materials Technologies

DOI
10.1002/admt.201700242
10.1002/admt.201870013

Additional Links
http://onlinelibrary.wiley.com/doi/10.1002/admt.201700242/full

Permanent link to this record