CNT Electrodes

Carbon nanotubes (CNTs) exhibit unique physical, chemical and electrical properties, which make them interesting candidates for nano-electronics. Besides their outstanding properties CNTs are bio compatible and can be used in bioelectronics such as sensor devices or implants. We have shown that Neurons adhere better on Carbon nanotubes than on Silicon-substrate. In the future we want to introduce a novel chip that uses CNTs to record extracellular neural signals. Those electrodes should have an outstanding signal-to-noise ratio due to the large surface and also be capable of being used to stimulate the neural network with voltage pulses.

 

Patterning

Patterned neuronal network

Precise control over the surface composition of materials allows either the reduction or the promotion of cell growth. Patterning of the surface properties is achieved by microcontact printing with a PDMS stamp (µCP) or by self-adjusting processes controlled by the underlaying material. This enables structured adhesion of cell cultures such as primary neurons or cardiac myocytes by allowing cells to be placed on well defined areas of the substrate or device. One motivation for biopatterning surfaces of typically glass and gold substrates is the controlled growth of neural nets on a microelectrode array chip. Future work will focus on the long-term electrostatic nanopatterning of dielectric thin films so called electrets.