Fig. 4. SAED study of SiO2 nanoparticles in TEM device at initial (a) and irradiated with neutron flux (b).As a result of the analyses, it has been revealed that the sample has not changed its state before and after irradiation, that is the sample keeps its amorphous feature before and after irradiation. It can be easily observed in SAED images taken in TEM device. Thus, from general analyses of the nanoparticles it has been revealed that macro or micro-size “adhesion” is not observed in SiO2 nanoparticles after neutron irradiation. So, if not to consider the small-size nano “adhesion”, practically, the nanoparticles keep its nano feature before and after irradiation.