Effect of electron beam on the crystal structure of nanoscale Al particles
Abstract
E-beam irradiation is one of the favorite methods of recent years and it can deliver the irradiation dose in just a few seconds to form nanoparticles. It is possible to obtain nanoparticles with different properties by changing the experimental conditions, as well as radiolytic reduction process can be adjusted through accelerators, it is possible to obtain oxides and hydroxides of metal nanoparticles. This paper reports the investigation of high-energy electron beams (EBs) on the crystal structure of 40–60 nm nanoscale Al particles. The crystal structure of the samples was calculated using the Rietveld method in the FullProf program. Structure analysis of three different irradiated (, , ) Al samples and nonirradiated Al samples was performed by XRD. Occurring energy during the process of linear electron acceleration was around 2–3 MeV. All samples were irradiated at room temperature. In addition to STP, temperature changes can be observed when the particles are exposed to high energy for a long time. At STP, nanoscale Al particles combine with the oxygen of the air and form Al2O3. Also, X-ray diffraction study showed that the instability does not only belong to Al particles but also to Al2O3 in view of the fact that precarious Al(OH)3 crystal structures were observed. Thus, radiation dependence of lattice parameters was obtained, the mechanism of change of lattice parameters was determined due to radiation.
