Limit of detection of the aptasensor.

Abstract

<p>(A) Square wave voltammograms obtained after incubating the R4–6 aptamer-based sensors with (<i>a</i>) 0, (<i>b</i>) 100, (<i>c</i>) 200, (<i>d</i>) 300, (<i>e</i>) 400, (<i>f</i>) 500, (<i>g</i>) 600, (<i>h</i>) 700, and (<i>i</i>) 800 <i>Cryptosporidium parvum</i> oocysts. (B) Calibration plot of the change in current intensity (ΔI) <i>vs</i>. number of oocysts. (C) Calibration plot of the change in potential (ΔE) <i>vs</i>. number of oocysts.</p