Extremely non-equilibrium synthesis of luminescent zinc oxide nanoparticles through energetic ion condensation in a dense plasma focus device

Abstract

Luminescent ZnO nanoparticles have been synthesized on silicon and quartz substrates under extremely non-equilibrium conditions of energetic ion condensation during the post-focus phase in a dense plasma focus (DPF) device. Ar+, O+, Zn+ and ZnO+ ions are generated as a result of interaction of hot and dense argon plasma focus with the surfaces of ZnO pellets placed at the anode. It is found that the sizes, structural and photoluminescence (PL) properties of the ZnO nanoparticles appear to be quite different on Si(1 0 0) and quartz substrates. The results of x-ray diffractometry and atomic force microscopy show that the ZnO nanoparticles are crystalline and range in size from 5–7 nm on Si(1 0 0) substrates to 10–38 nm on quartz substrates. Room-temperature PL studies reveal strong peaks related to excitonic bands and defects for the ZnO nanoparticles deposited on Si (1 0 0), whereas the excitonic bands are not excited in the quartz substrate case. Raman studies indicate the presence of E2 (high) mode for ZnO nanoparticles deposited on Si(1 0 0).

Microwave-electrochemical formation of colloidal zinc oxide at fluorine doped tin oxide electrodes

“…The emission spectrum exhibits a main peak at 380 nm (3.26 eV) which is in good agreement to the data reported previously [43]. This peak is related to the blue visible emission and can be attributed to the band to band transition [44].…”

Metal-insulator-metal capacitors based on lanthanum oxide high-κ dielectric nanolayers fabricated using dense plasma focus device

“…13,[16][17][18] A schematic arrangement of the DPF device with the modified anode and other modifications is shown in Fig. A 200 nm-thick aluminum (Al) metal film was deposited on the wafer as the bottom electrode by thermal evaporation.…”

Research into effect of electrochemical etching conditions on the morphology of porous gallium arsenide

“…There are several chemical [14,15] and physical methods that have been successfully employed for fabricating the nanostructures of various materials [16]. Plasma-based processing, such as [17,18], remain popular:…”