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Materials 2015, 8(8), 4992-5006; doi:10.3390/ma8084992

Nanocarbon-Coated Porous Anodic Alumina for Bionic Devices

1
School of Physics, the University of Melbourne, Melbourne, VIC 3010, Australia
2
School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
3
Plasma Nanoscience Laboratories, Commonwealth Scientific and Industrial Research Organisation (CSIRO), PO Box 218, Lindfield, NSW 2070, Australia
4
Center for Additive Manufacturing, School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Carlton, VIC 3053, Australia
5
Department of Anatomy and Neuroscience, the University of Melbourne, Parkville, VIC 3010, Australia
*
Authors to whom correspondence should be addressed.
Academic Editor: Jun-ichi Anzai
Received: 7 July 2015 / Revised: 23 July 2015 / Accepted: 3 August 2015 / Published: 5 August 2015
View Full-Text   |   Download PDF [4909 KB, uploaded 5 August 2015]   |  

Abstract

A highly-stable and biocompatible nanoporous electrode is demonstrated herein. The electrode is based on a porous anodic alumina which is conformally coated with an ultra-thin layer of diamond-like carbon. The nanocarbon coating plays an essential role for the chemical stability and biocompatibility of the electrodes; thus, the coated electrodes are ideally suited for biomedical applications. The corrosion resistance of the proposed electrodes was tested under extreme chemical conditions, such as in boiling acidic/alkali environments. The nanostructured morphology and the surface chemistry of the electrodes were maintained after wet/dry chemical corrosion tests. The non-cytotoxicity of the electrodes was tested by standard toxicity tests using mouse fibroblasts and cortical neurons. Furthermore, the cell–electrode interaction of cortical neurons with nanocarbon coated nanoporous anodic alumina was studied in vitro. Cortical neurons were found to attach and spread to the nanocarbon coated electrodes without using additional biomolecules, whilst no cell attachment was observed on the surface of the bare anodic alumina. Neurite growth appeared to be sensitive to nanotopographical features of the electrodes. The proposed electrodes show a great promise for practical applications such as retinal prostheses and bionic implants in general. View Full-Text
Keywords: nanocarbon coating; nanoporous aluminum oxide; diamond-like carbon; chemical resistivity; neural compatibility; bionic devices nanocarbon coating; nanoporous aluminum oxide; diamond-like carbon; chemical resistivity; neural compatibility; bionic devices
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Aramesh, M.; Tong, W.; Fox, K.; Turnley, A.; Seo, D.H.; Prawer, S.; Ostrikov, K.K. Nanocarbon-Coated Porous Anodic Alumina for Bionic Devices. Materials 2015, 8, 4992-5006.

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