Synthesis of nanoparticles in helium droplets-A characterization comparing mass-spectra and electron microscopy data.
Synthesis of nanoparticles in helium droplets-A characterization comparing mass-spectra and electron microscopy data.
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氦液滴中纳米粒子的合成 - 比较质谱和电子显微镜数据的表征。
DOI：
10.1063/1.4932182
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
W. Ernst
中科院分区：
文献类型：
--
作者：
P. Thaler;Alexander Volk;Daniel Knez;F. Lackner;G. Haberfehlner;J. Steurer;Martin Schnedlitz;W. Ernst
微米大小的氦液滴为纳米颗粒的生长提供了非凡的环境。该方法在制备核壳颗粒以及一维纳米结构方面具有巨大的潜力，这些颗粒沿着量子涡旋聚集，而不涉及溶剂、配体或添加剂。使用新设备，我们能够记录重掺杂簇（> 10(4) amu）的质谱并同时生产用于透射电子显微镜的样品，我们合成了由各种材料（金、镍、铬和银）组成的裸纳米颗粒和双金属纳米颗粒。我们对氦液滴内团簇和纳米粒子的生长过程进行了系统研究，可以用简单的理论模型来描述。
Micrometer sized helium droplets provide an extraordinary environment for the growth of nanoparticles. The method promises great potential for the preparation of core-shell particles as well as one-dimensional nanostructures, which agglomerate along quantum vortices, without involving solvents, ligands, or additives. Using a new apparatus, which enables us to record mass spectra of heavy dopant clusters (>10(4) amu) and to produce samples for transmission electron microscopy simultaneously, we synthesize bare and bimetallic nanoparticles consisting of various materials (Au, Ni, Cr, and Ag). We present a systematical study of the growth process of clusters and nanoparticles inside the helium droplets, which can be described with a simple theoretical model.