We report the design,
fabrication and quantitative performance analysis of a low-cost, flexible
carbon nanotube (CNT) network-based deoxyribonucleic acid (DNA) sensor. These
sensors comprise an array of ink-jet printed silver (Ag) electrodes on a
transparent polyethylene terephthalate (PET) flexible substrate, where a CNT
network acts as a sensing layer. The DNA hybridization is studied by
immobilizing single-stranded DNA (ssDNA) probes on the CNT surface; these
probes recognize their complementary DNA target. Further, we have carried out a
quantitative performance analysis of the flexible CNT biosensors using the
analytic hierarchy process (AHP). We have identified various influencing
factors and sub-factors (performance indicators), and quantified the
performance of the flexible CNT biosensors in different measured states (before
bending, during bending and after bending). Additionally, the noise and other
external factors contributing to the measured real signal have been
quantified. The interpretation of the
overall outcome will enable the improvement of the performance of flexible
biosensors fabricated through large-scale manufacturing for possible
commercialization.