Binary alloy nanoparticles were fabricated by two combinatorial methods: (I) cosputtering from elemental targets into the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [Bmim][(Tf)2N] and (II) by mixing elemental nanoparticles after sputtering them separately into [Bmim][(Tf)2N]. Both methods lead to the formation of Au-Cu nanoparticles (2.3 nm for cosputtered, 3.6 nm for mixed), however with different resulting compositions: cosputtered nanoparticles show a composition range of Au80-90Cu20-10; mixing of Au- and Cu-loaded ionic liquids leads to the formation of Au75Cu25 nanoparticles. Annealing the binary nanoparticles at 100 °C shows that the mixed nanoparticles grow to sizes of 4.1 nm, whereas the cosputtered nanoparticles grow only to 3 nm.

中文翻译：

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通过共溅射和混合元素纳米粒子在离子液体中的二元纳米粒子的组合合成。

通过两种组合方法制备二元合金纳米颗粒：（I）从元素靶物共溅射到离子液体1-丁基-3-甲基咪唑鎓双（三氟甲基磺酰基）酰亚胺[Bmim] [（Tf）2N]中，以及（II）通过混合元素纳米颗粒将它们分别溅射到[Bmim] [（Tf）2N]中之后。两种方法都导致形成Au-Cu纳米颗粒（共溅射为2.3 nm，混合溅射为3.6 nm），但是形成的成分不同：共溅射的纳米颗粒的组成范围为Au80-90Cu20-10；负载金和铜的离子液体的混合导致形成Au75Cu25纳米粒子。将二元纳米颗粒在100°C退火显示混合纳米颗粒生长至4.1 nm，而共溅射纳米颗粒仅生长至3 nm。