clear potential to enable the fabrication of paper-based microfluidic
sensors, i.e. patterns and incorporated sensing chemistries, by con-
tinuous high-speed and large-volume industrial printing processes.
Such efficiencies enable the ultimate practical use of these sensors
for health care and environmental applications. Since printed paper
retains its original flexibility, the new method also overcomes the
problem of channel damage by folding and bending. Also, simple
and functional elements, such as switches and micro-reactors, can
be easily built into the devices made by this approach