Figure 3.

(A) Fluorescence intensity histogram of CdTe QDs/TMPyP and CdTe QDs/TMPyP/OTA aptamer in the presence of 0.1 μmol L⁻¹, 0.125 μmol L⁻¹, 0.15 μmol L⁻¹, 0.175 μmol L⁻¹, and 0.2 μmol L⁻¹ of TMPyP. (CdTe: 4.2 × 10⁻⁹ mol L⁻¹; OTA: 20 ng mL⁻¹). (B) The linear plot of fluorescence intensity (F₂ − F₁)/F₀ as a function of TMPyP (n = 3). (C) Fluorescence intensity as a function of incubation time (1, 3, 5, 8, and 10 min). (CdTe: 4.2 × 10⁻⁹ mol L⁻¹; TMPyP: 0.175 μmol L⁻¹; OTA: 15 ng mL⁻¹).