Investigation of Microwave Irradiation Procedure for Synthesizing CdSe Quantum Dots

Figure 6

Plot of time-dependent photoluminescence (PL)/initial photoluminescence (PL₀) (a), image at t = 0 days (b), and image at t = 9 days (c) for comparative samples of CdSe QD solutions (170°C; 2 min 30 s). QDs were either left in a closed lab drawer with limited exposure to ambient light (solid line, square shape), placed on an open laboratory tabletop with continual exposure to mostly fluorescent light (dashed line, triangle shape), or placed on an interior windowsill with frequent exposure to sunlight and fluorescent light (dotted line, circle shape) for the course of the experiment. In the pictures from left to right, the samples are neat 1-octadecene, QDs left on the windowsill, QDs left on the tabletop, and QDs stored in the drawer, respectively.

(a)

(b)

(c)