$\mathrm{Cu}$-$\mathrm{Ag}$-alloy nanoparticles (NPs) are synthesized from micropowders of pure $\mathrm{Cu}$ and $\mathrm{Ag}$ by two consecutive nonequilibrium processes based on plasma and lasers in liquids. The plasma process reduces the size of the particles forming the initial powders from micrometer size to nanometer size, at which the laser fluence is sufficient to melt them, making alloying possible. Measurements at macroscopic (solution absorption), microscopic (scattering of individual NPs), and nanoscopic (electron microscopy) scales confirm alloying of NPs and homogenization of size and composition. This has a noticeable effect on the final colloidal solution, which absorbs yellow-orange light (550–600 nm) after laser treatment. With a synthesis rate of 360 mg/h, this process opens up possibilities for nonequilibrium nanometallurgy of functional NPs.

中文翻译：

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等离子体和激光过程在液体中对合金纳米粒子合成的协同效应

$铜$--$银$合金纳米粒子（NPs）由纯净的微粉合成 $铜$ 和 $银$通过连续两次基于液体中的等离子体和激光的非平衡过程 等离子体处理将形成初始粉末的颗粒的尺寸从微米尺寸减小到纳米尺寸，在该处激光通量足以熔化它们，从而使合金化成为可能。在宏观（溶液吸收），微观（单个NP的散射）和纳米（电子显微镜）标度上进行的测量证实了NP的合金化以及尺寸和成分的均质化。这对最终的胶体溶液具有明显的影响，该胶体溶液在经过激光处理后会吸收橙黄色的光（550-600 nm）。合成速率为360 mg / h，该工艺为功能性NP的非平衡纳米冶金开辟了可能性。