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A neural cell culture study on thin film electrode materials

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Abstract

Functional neural stimulation requires good interface between the neural cells and the electrode surfaces. In order to study the effect of electrode materials and surface structure on cell adhesion and biocompatibility, we cultured cortical neurons on thin films of platinum and iridium oxide. We used both flat, as-deposited and laser micro-structured films. The laser micro-structuring consisted of creating regular arrays of micro-bumps or holes with diameters of 4–5 μm and height of about 1.5 μm. The micro-bumps were fabricated onto platinum and iridium film surfaces deposited on borosilicate glass substrates, using mask-projection irradiation with single nano-second pulses from a KrF excimer laser (λ = 248 nm). Amorphous and crystalline (deposited at 250 °C) IrO2 films were deposited onto the laser micro-structured iridium films by pulsed-DC reactive sputtering to obtain micro-structured IrO2 films. Cortical neurons isolated from rat embryo brain were cultured onto these film surfaces. Our results indicate that flat and micro-structured film surfaces are biocompatible and non-toxic for neural cell growth. The use of poly-d-lysine as a mediator for cell adhesion onto the thin film surfaces is also discussed.

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Acknowledgements

This work was supported by Michigan Life Sciences Corridor Grant GR-358. The authors would like to acknowledge Smart Sensors and Integrated Microsystems (SSIM) for technical help.

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Authors and Affiliations

  1. Department of Biomedical Engineering, Wayne State University, Detroit, MI, 48202, USA

    Sachin Thanawala & Gregory Auner

  2. Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI, 48202, USA

    Olena Palyvoda, Daniel G. Georgiev & Gregory Auner

  3. Department of Chemical Engineering, Wayne State University, Detroit, MI, 48202, USA

    Saida P. Khan

  4. Department of Mechanical Engineering, Wayne State University, Detroit, MI, 48202, USA

    Ibrahim A. Al-Homoudi & Golam Newaz

Authors
  1. Sachin Thanawala
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  2. Olena Palyvoda
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  3. Daniel G. Georgiev
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  4. Saida P. Khan
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  5. Ibrahim A. Al-Homoudi
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  6. Golam Newaz
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  7. Gregory Auner
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Correspondence to Sachin Thanawala.

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Thanawala, S., Palyvoda, O., Georgiev, D.G. et al. A neural cell culture study on thin film electrode materials. J Mater Sci: Mater Med 18, 1745–1752 (2007). https://doi.org/10.1007/s10856-007-3054-1

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  • DOI: https://doi.org/10.1007/s10856-007-3054-1

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