Nanoparticle Formation in Zinc-Ion-Implanated Quartz UponOxidation at Elevated Temperaturesстатья
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Дата последнего поиска статьи во внешних источниках: 25 ноября 2020 г.
Аннотация:The results of the synthesis of metallic zinc nanoparticles (NPs) and its oxide in amorphous quartz,implanted with 64Zn+ ions with an energy of 50 keV and a dose of 5 × 1016/cm2, and isochronously annealedin oxygen with a step of 100°C for 1 hour at each step in the temperature range of 400−900°C, are presented.For the study we use the methods of electron scanning and transmission microscopy in combination withenergy-dispersive spectroscopy and electron diffraction, as well as atomic-force microscopy, optical transmissionand photoluminescence. It is found that after implantation, a few Zn-containing NPs with a size ofless than 100 nm are recorded on the quartz surface, and metal Zn NPs with a size of about 3nm are recordedinside the sample body. It is established that during annealing, the implanted sample becomes more transparentas a constant transition from the opaque phase of metallic Zn to the transparent phases of its oxide andsilicide occurs. After annealing at 700°C, the quartz surface becomes very developed and numerous Zn-containingNPs and craters are recorded on it; zinc-oxide nanoparticles with a size of 4.5 nm are formed in thesample body. In this case, a photoluminescence peak in the form of a doublet at a wavelength of 370 nm,caused by the ZnO phase, is formed on the spectrum. After annealing at 900°C, the zinc-oxide phasedegrades and a willemite phase of Zn2SiO4 is formed.