FEI Quanta FEG 250, User'S Operation Manual, Page: 205 / 228

System Options: Quanta Morphologi
9-57
Quanta Morphologi
Quanta Morphologi is a method for precise determination of size and
shape of submicron particles dispersed in a dilution. It is a complex
method which consists of sample preparation, image acquisition and
image analysis.
SAMPLE PREPARATION
ITO slides
Dilution with dispersed particles is deposited on the conductive side of
the ITO (Indium Tin Oxide) slide and left to dry out. Fully dried ITO
slide is laid on the holder, tightened by the screw and easily attached
to the single stub holder.
Note:
The ITO slide holder is constructed for safe rotation of 360° when the
free working distance (FWD - Z axis) is 10 mm. Otherwise, the ITO
slide holder can touch parts of the specimen chamber.
FIGURE 9-48 ITO SLIDE FIXED TO THE HOLDER
HOLDER ATTACHED TO THE STAGE
Filter membranes
Use of filter membranes is another eventuality of sample preparation.
Dilution containing particles is passed through a filter membrane with
pores of diameter of 50 nm or less. Particles are caught on the
membrane that is further fixed on the 25 mm stub by the conductive
carbon tape. In this case, wet membranes can be fixed on the stub
and inserted to the specimen chamber.