Solvothermal hot injection AgNi nanoalloy preparation

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Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
Název česky Solvotermální příprava nanoslitiny AgNi metodou horkého vstřikování
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VYKOUKAL Vít PINKAS Jiří BURŠÍK Jiří ROUPCOVÁ Pavla

Rok publikování 2015
Druh Konferenční abstrakty
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Přiložené soubory
Popis Chemical synthesis of nanomaterials is a very progressive field of study. Preparation of nanoalloys is a challenging task due to their chemical, phase, and morphological variability. Nanoparticles of metal alloys exhibit many interesting properties, such as depression of melting point,1,2,3 plasmon resonance4,5, magnetism, and catalytic activity. For nanoalloys preparation, the solvothermal synthesis, specifically in oleylamine is highly advantageous.6,7 Hot injection technique should ensure homogeneous conditions for nanoparticles nucleation and growth. AgNi nanoparticles were prepared by injection of an oleylamine solution (4 cm3) of AgNO3 and Ni(acac)2 (different ratios, 4 mmol total amount) to a mixture of oleylamine (16 cm3) and octadecene (20 cm3) at 230 °C. After 10 minutes, the reaction mixture was cooled down to room temperature in a water bath. Then 20 cm3of acetone was added and the mixture was centrifuged. Acetone was added to increase the yield. The precipitate was washed by a mixture of hexane and acetone (1:3 volume ratio). This procedure was repeated twice and finally the precipitate was dispersed in hexane and characterized. Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM), and Small-Angle X-ray Scattering (SAXS) analyses were carried out for determination of average size, size distribution, and shape of prepared nanoparticles. Obtained results were mutually compared. Thermal behavior was characterized by Differential Scanning Calorimetry (DSC). Plasmon resonances were observed and we found out that the intensity of plasmon resonance was dependent on the molar ratio of AgNi in the particles.
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