
310 Biosensors Based on Nanomaterials and Nanodevices
and the electrode tips. This step was followed by an HF buffered oxide etch to remove
the exposed silicon oxide coating from the contact pads and the portion of the nanobers
above the passivation layer. Figure 12.8 shows optical and SEM micrographs of the VACNF
arrays used.
Before performing recordings, the VACNF chips were cleaned by an air plasma treatment
for 30 s before being coated with a poly--lysine and laminin in water mixture overnight
followed by three water rinses. The hippocampal slices were obtained from a postnatal
8–11 day rat pup and were sectioned to be 400 μm thick.
Spontaneous ...