Nanostructures, Poster

FABRICATION OF NANOCOMPOSITE COATINGS WITH EMBEDDED HYDROPHOBIC MAGNETITE NANOPARTICLES ON THE SURFACE OF ALUMINUM WIRES

Denis Voronin, Saratov State University, Russia
Valentina Belova, Max Planck Institute of Colloids and Interfaces, Germany
Dimitriya Borisova, Max Planck Institute of Colloids and Interfaces, Germany
Dmitry G. Shchukin, Max Planck Institute of Colloids and Interfaces, Germany
Dmitry A. Gorin, Saratov State University, Russia

ABSTRACT

In present the development of wireless market requires the devices with reduced size and increased functionality [1]. This means the fabrication of the elements basis with enhanced characteristics and one of the key aspects is the design of high-quality passive elements, including integrated inductors. The main approach here is incorporation of thin magnetic nanocomposite films in the inductor’s structure in order to increase their inductance and quality factor [2-4].
In our work we suggest a novel approach to increase the parameters of existing inductive elements combining two simple preparation steps: ultrasound surface treatment in water and functionalization of sonicated surface using layer-by-layer deposition technique (LbL). Ultrasound treatment leads to the formation of a porous surface structure [5], which could be filled with magnetic nanoparticles by LbL [6].
The surface modification and adsorption nanoparticles were investigated with SEM, XRD, and contact angle measurement techniques. Also the resistance and the inductance of the samples, as the main parameters determined the quality of inductive elements, were measured. The samples with high amount of magnetic nanoparticles in coating demonstrated significant increase in inductance and slight decrease in resistance comparing to uncoated ones. This means the increase in quality factor of investigated inductive elements [6].

Acknowledgments

The reported study was partially supported by RFBR, research project No. 11-08-12058-ofi-m-2011.

References

1. Aguilera, J.; Berenguer, R., Design and test of intagrated inductors for RF applications. Kluwer Academic Publishers: 2004.
2. Ito, H.; Takeuchi, A.; Okazaki, S.; Kobayashi, H.; Sugawa, Y.; Takeshima, A.; Sonehara, M.; Matsushita, N.; Sato, T., Fabrication of Planar Power Inductor for Embedded Passives in LSI Package for Hundreds Megahertz Switching DC-DC Buck Converter. IEEE Trans. Magn. 2011, 47, 3204-3207.
3. Yamaguchi, M.; Suezawa, K.; Arai, K. I.; Takahashi, Y.; Kikuchi, S.; Shimada, Y.; Li, W. D.; Tanabe, S.; Ito, K., Microfabrication and characteristics of magnetic thin-film inductors in the ultrahigh frequency region. J. Appl. Phys. 1999, 85, 7919-7922.
4. I. Kowase; T. Sato; K. Yamasawa; Y, M., A Planar Inductor Using Mn–Zn Ferrite/Polyimide Composite Thick Film for Low-Voltage and Large-Current DC–DC Converter. IEEE Trans. Magn. 2005, 41, 3991-3993.
5. Shchukin, D. G.; Skorb, E.; Belova, V.; Möhwald, H., Ultrasonic Cavitation at Solid Surfaces. Adv. Mater. 2011, 23, 1922-1934.
6. Voronin D., Borisova D., Belova V., Gorin D. A., Shchukin D. G., Effect of Surface Functionalization of Metal Wire on Electrophysical Properties of Inductive Elements. Langmuir, DOI:10.1021/la300870y.

Representing author

photo

Mr. Denis Voronin

Saratov State University
Russia

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