Figure 2.

A) TEM images and size distribution using DLS of a,f) CdTe QDs, b,g) CPTQDs, c,h) NPTQDs d,I), and TCPQDs e, m) nanohybrids in phosphate buffer saline (PBS) solution (pH 7.4) and B) cell viability of HeLa cells in the presence of 400 and 600 µg mL⁻¹ and their equivalent amount from bare QDs of the CdTe QDs, CPTQDs, NPTQDs, APTQDs, and TCPQDs a); effects of pH b) and incubation time c) on the fluorescence quenching of CPTQD, NPTQD, APTQD, and TCPQD sensors in the presence of TNP. The concentrations of TNP and the sensors are 5.0 and 10.0 × 10⁻⁶ m, respectively.