Study the Effects of different parameters on particles dispersion in TEM sample preparation

Dispersion is one of the most popular techniques to powder sample preparation for TEM imaging. Powder dissolved in a relatively volatile solvent will be dropped on a circular copper grid. If the sample is not already dispersed in solution, it will be agglomerated and formed into large particles which are not proper to TEM imaging. In this study the effects of different parameters such as temperature, pH, Ultrasonic, etc. on dispersion of particles have been investigated. It shows that the increase in ultrasonic's time cause to the better dispersion but it has an optimum time. Using surfactants depends on the other parameters and it will be easily operable by measuring Zeta potential.