Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 18: Carbon: Diamond, nanotubes and Buckyballs

HL 18.4: Vortrag

Montag, 31. März 2014, 15:45–16:00, POT 112

Diamond-based platforms for long-term growth and investigations of neurons — •Alexandra Voss¹, Hongying Wei², Cyril Popov¹, Monika Stengl², and Johann Peter Reithmaier¹ — ¹Institute of Nanostructure Technologies and Analytics, University of Kassel, Germany — ²Department Animal Physiology, University of Kassel, Germany

Due to biocompatibility, large electrochemical potential window and high chemical stability, combined with a number of superior physical properties, all types of diamond films are ideal candidates for platforms for biotechnological applications, such as multielectrode arrays (MEA) for neuronal signal derivation. In our work we investigated the suitability of the integration of diamond into the fabrication process of MEA structures. For this purpose the deposition of our ultrananocrystalline diamond (UNCD) layers was investigated on different glass types and metal layers to achieve closed uniform UNCD layers with good substrate adhesion confirmed by optical microscopy and SEM. For further investigations of transparent layer systems Eagle 2000 was chosen. Better optical quality was achieved by decreasing the UNCD layer thickness. For this purpose several diamond powder dispersions for pretreatment were evaluated to enhance the nucleation leading to shorter deposition times. This increases the transparency as confirmed by ellipsometry and transmission spectroscopy. In earlier experiments the improved adhesion of pacemaker neurons of R. maderae was confirmed on UNCD layers with different surface termination. This fact was used to improve the cell culture preparation technique.