Research Article

Optical and Piezoelectric Properties of Mn-Doped ZnO Films Deposited by Sol-Gel and Hydrothermal Methods

Figure 5

2D AFM images at the scale of 2 × 2 μm2 for undoped (a) and Mn-doped ZnO films (c-d) with 10 layers prepared by SG method.
(a)
(b)
(c)
(d)