**5.2 Dimensions to be examined**

Scanning electron microscopes are manufactured in a certain size in that they are high-tech and have electron guns and magnetic deflectors on them. Therefore the

#### **Figure 12.**

*SEM image of a wet sample (a) natural dried (b) critical dryer dried.*

**Figure 13.** *Schematic representation of sample size suitable for SEM device.*

sample chamber has a certain volume. Rotation and angulation in the sample chamber also limits the width, length, and height of the sample. Therefore, the maximum width and maximum height are limited to 7.5 cm. In addition, the maximum height of the sample can be at most 2 cm. However, in some SEM devices, the sample holders can be removed and the height can be increased up to 5 cm. Since this situation is not valid for all samples, the sample height should be accepted as 2 cm as a standard. Representative dimensions are shown in **Figure 13**.
