FORMATION AND OBSERVATION OF ULTRAFINE PARTICLES

The nucleation and growth of gas-evaporated particles is discussed and obvious shortcomings in today's knowledge are pointed out. A better k nowledge of gas evaporation would improve on the production and give n ew possibilities in the choice of starting materials for nanostructure s. Furthermore, two examples are shown where a wide range of transmiss ion electron microscopy methods are used together to gain maximum info rmation, namely a superstructure of iron oxide particles and contrast from small particles, including adhesion strain fields. By using a com bination of phase contrast, amplitude contrast, microdiffraction, micr oanalysis and image simulation, more information can be revealed from nanostructured materials.