We synthesized Ag@Ni core-shell nanoparticles by the solvothermal hot injection method and characterized them as for their shape and size by dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), and transmission electron microscopy (TEM). We previously demonstrated their core-shell structure by scanning transmission electron microscopy with energy dispersive spectroscopy (STEM-EDS). The silver/nickel phase diagram was calculated by the CALPHAD method, and the melting points of 10, 15, and 20 nm silver nanoparticles were predicted at 930.2, 940.7, and 946.0 °C, respectively. We took advantage of the nickel shell to avoid silver sintering and to confirm the calculated melting point depression (MPD). The results obtained from the differential scanning calorimetry (DSC) experiments revealed the melting points of 11–15 nm nanoparticles at 944–949 °C in agreement with calculated values.

我们通过溶剂热注入法合成了Ag @ Ni核壳纳米粒子，并通过动态光散射（DLS），小角X射线散射（SAXS）和透射电子显微镜（TEM）对它们的形状和尺寸进行了表征。 。我们先前通过能量色散光谱扫描透射电子显微镜（STEM-EDS）展示了它们的核-壳结构。银/镍相图由CALPHAD计算方法，预测10、15和20 nm的银纳米颗粒的熔点分别在930.2、940.7和946.0°C下。我们利用镍壳来避免银烧结，并确定计算出的熔点降低（MPD）。从差示扫描量热法（DSC）实验获得的结果表明，在944-949°C下11-15 nm纳米颗粒的熔点与计算值一致。