56 HIGH PERFORMANCE POLYMERS
Also, theuse of parylene-C in microelectrode arrays
as retinal prostheses has been described [94].
The issues of surface engineering and patterning of
using parylene for biological applications have been
reviewed [95]. Micropatterned surfaces are attractive
in engineering biosensors and biological microenvi-
ronments. A variety of substituted cyclophane precur-
sors allow direct coating of functionalized parylenes
onto biomedical implants and microfluidics. Thus, a
convenient method for designing biocompatible and
bioactive surfaces is established.
Biomolecular arrays can be generated by the print-
and-peel method [96]. Here, first an ink-jet printer is
aligned to a parylene template with nanoscale open-
ings. After printing,