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Manufacturing of high aspect-ratio 3-dimensional PolyFerroCNT nanocomposite polymer electrodes

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Abstract

We present the preparation, micro-patterning, and electrical property characterization of 3-dimensional PolyFerroCNT™ electrodes (minimum feature size of 200 ± 10 μm, with a height of approximately 200 μm) comprised of polydimethylsiloxane (PDMS), ferrofluid, and graphetized multi-walled carbon nanotubes (G-CNT) for the purpose of creating thermally stable, flexible, conductive, semi-transparent, and biocompatible electrodes with magnetically inducible “active” microstructures. We performed electrical characterizations for different weight percentage of G-CNTs, PDMS, and ferrofluid and demonstrated resistivity as low as 1 KΩ-cm. The electrical property of our nanocomposite electrodes was shown to be a function of not only the weight percentage of its constituents; but also the cure temperature and cure time during the baking step. Further, we have demonstrated successful attachment of oligonucleotides to PolyFerroCNT™ electrodes opening a possibility of using such electrodes in molecular diagnostics and related areas.

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Acknowledgments

The authors would like to Dr. Steve Barlow of SDSU Electron Microscope Facilities for SEM support.

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Authors and Affiliations

  1. MEMS Research Lab, Department of Mechanical Engineering, College of Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182-1323, USA

    Sam Kassegne, Beejal Mehta & Ajit Khosla

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  1. Sam Kassegne
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  2. Beejal Mehta
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  3. Ajit Khosla
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Correspondence to Sam Kassegne.

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Kassegne, S., Mehta, B. & Khosla, A. Manufacturing of high aspect-ratio 3-dimensional PolyFerroCNT nanocomposite polymer electrodes. Microsyst Technol 21, 1619–1625 (2015). https://doi.org/10.1007/s00542-014-2250-4

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  • DOI: https://doi.org/10.1007/s00542-014-2250-4

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