Metal nanoparticles exhibit different characteristics from bulk bodies due to the size effect. At this time, it is
possible to produce outstanding characteristics by achieving uniform particle size and variation. Observation
using a transmission electron microscope (TEM) is a widely known method for investigating the size and
variation of particles on the nano size level. However, this method requires considerable time and labor to
determine factors such as the average structure or particle diameter distribution. If the small-angle X-ray
scattering method is used, the average structure (particle diameter distribution) can be determined in a time
ranging from a few minutes to about 1 hour.
