SOPOUŠEK, Jiří, Anna KRYŠTOFOVÁ, Milena PREMOVIC, Ondřej ZOBAČ, Svatava POLSTEROVÁ, Pavel BROŽ and Jiří BURŠÍK. Au-Ni nanoparticles: Phase diagram prediction, synthesis, characterization, and thermal stability. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY. OXFORD: Elsevier Science, 2017, vol. 58, September, p. 25-33. ISSN 0364-5916.
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Basic information
Original name Au-Ni nanoparticles: Phase diagram prediction, synthesis, characterization, and thermal stability
Name in Czech Nanočástice Au-Ni: Předpověď fázového diagramu, syntéza, charakterizace a tepelná stabilita
Authors SOPOUŠEK, Jiří (203 Czech Republic, guarantor, belonging to the institution), Anna KRYŠTOFOVÁ (203 Czech Republic, belonging to the institution), Milena PREMOVIC (688 Serbia), Ondřej ZOBAČ (203 Czech Republic, belonging to the institution), Svatava POLSTEROVÁ (203 Czech Republic, belonging to the institution), Pavel BROŽ (203 Czech Republic, belonging to the institution) and Jiří BURŠÍK (203 Czech Republic).
Edition CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, OXFORD, Elsevier Science, 2017, 0364-5916.
Other information
Original language English
Type of outcome Article in a journal
Field of Study Physical chemistry and theoretical chemistry
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL URL
RIV identification code RIV/00216224:14310/17:00094748
Organization Přírodovědecká fakulta – Repository – Repository
UT WoS 000410869300004
Keywords (in Czech) nanoslitina; CAPHAD; fázový diagram; spinodalní rozklad
Keywords in English nanoalloy; CAPHAD; phase diagram; spinodal decomposition
Links GA14-12653S, research and development project. GA17-12844S, research and development project. GA17-15405S, research and development project. LQ1601, research and development project.
Changed by Changed by: RNDr. Daniel Jakubík, učo 139797. Changed: 4/9/2020 04:09.
Abstract
The Au-Ni nanoparticles (NPs) were prepared by oleylamine solvothermal synthesis from metal precursors. The Au-Ni phase diagram prediction respecting the particle size was calculated by the CALPHAD method. The hydrodynamic size of the AuNi NPs in a nonpolar organic solvent was measured by the dynamic light scattering (DLS) method. The average hydrodynamic sizes of the nanoparticle samples were between 18 and 25 nm. The metallic composition of the AuNi NP samples was obtained by inductively-coupled plasma atomic emission spectroscopy (ICP-OES). The metallic fraction inside AuNi NPs was varied Au-(30-70)wt%Ni. The steric alkylamine stabilization was observed. The individual AuNi NPs were investigated by transmission electron microscopy (TEM). The dry nanopowder was also studied. The structures of the aggregated samples were investigated by scanning electron microscopy (SEM). The AuNi NPs reveal randomly mixed face-centered cubic (FCC) crystal lattices. The phase transformations were studied under inert gas and air. The samples were studied by differential scanning calorimetry (DSC).
Abstract (in Czech)
Nanočástice Au-Ni (NPs) byly připraveny solvotermální syntézou z kovových prekurzorů. Predikce fázového diagramu Au-Ni s ohledem na velikost částic byla vypočítána metodou CALPHAD. Hydrodynamická velikost AuNi NP v nepolárním organickém rozpouštědle byla měřena metodou dynamického rozptylu světla (DLS). Průměrné hydrodynamické velikosti vzorků nanočástic byly mezi 18 a 25 nm. Chemické složení kovů vzorků AuNi NP bylo získáno indukčně vázanou plazmovou atomovou emisní spektroskopií (ICP-OES). Kovová frakce uvnitř AuNi NP byla různá v rozmězí Au-(30-70hm%)Ni. Byla pozorována sterická stabilizace alkylaminem. Jednotlivé NP AuNi byly zkoumány tramsmisní elektronovou mikroskopií (TEM). Také byl zkoumán suchý nanoprášek. Struktury agregovaných vzorků byly zkoumány pomocí skenovací elektronové mikroskopie (SEM). AuNi nanočástice vykazovaly krystalovou mřížku náhodně smíšeného tuhého roztoku (FCC). Fázové transformace byly studovány pod inertním plynem a na vzduchu. Vzorky byly také studovány diferenční skenovací kalorimetrií (DSC).
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  • a concrete person RNDr. Daniel Jakubík, uco 139797
  • a concrete person Mgr. Jolana Surýnková, uco 220973
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