Fig. 4.

Electrochemical detection of a specific target sequence: the sensor was interrogated via AC voltammetry. First, the baseline was established from the sample without any sequences, and measurements were taken after the addition of complementary target of 5 , 500 nM, and 100 nM, showing the percentage changes from baseline increase with increasing target concentrations. Additional measurements were taken for regeneration of the sensor and specificity against other sequences. Each error bar represents the standard deviation of three separate measurements.