A neural cell culture study on thin film electrode materials

作者：Thanawala Sachin^*; Palyvoda Olena; Georgiev Daniel G; Khan Saida P; Al Homoudi Ibrahim A; Newaz Golam; Auner Gregory

来源：Journal of Materials Science: Materials in Medicine , 2007, 18(9): 1745-1752.

DOI：10.1007/s10856-007-3054-1

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 mu m and height of about 1.5 mu m. 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 (lambda = 248 nm). Amorphous and crystalline ( deposited at 250 degrees 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.

• 出版日期2007-9