ZnO–Ag Composite Nanocrystals from Nanoemulsion: Synthesis, Magnetic, and Optical Properties

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We report a simple approach to synthesize ZnO–Ag composite nanocrystals with different ZnO/Ag ratios via a nanoemulsion process. The morphology and structure of the nanocrystals are investigated by X-ray diffraction and transmission electron microscopy, showing the high crystallinity of the nanocrystals with narrow size distributions. The corresponding optical and magnetic properties are analyzed with photoluminescence spectroscopy, ultraviolet–visible spectrometry and physical property measurement system in detail. The ensuing magnetism is interpreted in terms of nanosizing and other effects. Such ZnO–Ag nanocrystals may be further explored for biomedical applications and spintronic devices with interesting optical and magnetic properties.