Abstract
Formation of Ag–Au nanoalloy and self-organization of Ag nanoparticles into nanostructured wires under UV irradiation were reported in this work. This phenomenon was observed only in the presence of chloroauric acid. On the basis of the analysis of transmission electron microscope images and energy-dispersive X-ray spectroscopy, formation mechanism of nanostructured wires as well as of Ag–Au nanoalloy were proposed. The role of UV illumination and the presence of chloride ions were discussed. The UV–Vis spectra confirm that the synthesized material has one absorption band at 530 nm, which was related to the presence of Ag–Au nanoalloy. Moreover, the Ag–AgCl nanocomposite, in which Ag NPs are located on the edges of AgCl cubes, was successfully synthesized by the modified method.
Highlights
Everyday use materials that show signs of self-organization certainly include all kinds of polymeric materials, cosmetic products, decorative and impregnating products
The small, sphericalshaped, agglomerated Ag NPs were synthesized by the UV irradiation method (Fig. 1a–c)
Analysis of transmission electron microscopy (TEM) images (Fig. 1e, f) allowed to confirm that these wires are composed of Ag NPs with average diameter equal to 54 nm; this new structure can be treated as silver nanostructured wires unlike silver nanowires, which are generally composed of single crystal or multiple-twinned crystal [12]
Summary
Everyday use materials that show signs of self-organization certainly include all kinds of polymeric materials, cosmetic products (soaps), decorative and impregnating products (paints). It is the self-organization of individual mers, lipids or colloids into mesophase series that determines their final properties. The self-organization of materials is a result of changes in orientation and position of molecules in the system as a result of Brown’s movements. The created structures in the process of self-organization can be replaced by others due to the change of external factors of the system (e.g., external electric field, magnetic field, pH or temperature) [2,3,4]. It should be noted that the manipulation of external factors during self-organization processes may influence the geometry, crystallinity or chemical composition of nanoparticles
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