(a)
(b)
(c)
(d)
Figure 1: SEM images of (a) ZnSe film prepared using the pulsed laser deposition method. (b), (c), and (d) are the ZnSe film after ultrasonic-assisted thermal treatment for 4 h, 8 h, and 12 h, respectively. The inset of (b) is an enlarged image detailing the nanorods growth.