Photopolymerization as an innovative detection technique for low-density microarrays

One limitation that accounts in part for the scarcity of commercially available diagnostic microarrays is the expense associated with fluorescence detection, Here we present a colorimetric method based on photopolymerization as an on-chip signal amplification technique. Proof of principle experiments are detailed and followed by the use of a simple influenza microarray to demonstrate the technique for the first time with clinical samples. The advantages of this new technique include rapid (<5 min) signal amplification similar to 10(5)) in ambient conditions for both DNA and protein microarrays, low reagent cost (<$1 per assay), visual or inexpensive detection, and signal preservation for at least two years under ambient conditions.