期刊
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
卷 5, 期 -, 页码 466-475出版社
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.5.54
关键词
bimetallic magnetic nanoparticle; core-shell; magnetron sputtering; plasma gas condensation
资金
- Deutsche Forschungsgemeinschaft (DFG) via Schwerpunktprogramm [1681]
- European Union
- Free State of Saxony (LenA project) [100074065]
Magnetically anisotropic as well as magnetic core-shell nanoparticles (CS-NPs) with controllable properties are highly desirable in a broad range of applications. With this background, a setup for the synthesis of heterostructured magnetic core-shell nanoparticles, which relies on ( optionally pulsed) DC plasma gas condensation has been developed. We demonstrate the synthesis of elemental nickel nanoparticles with highly tunable sizes and shapes and Ni@Cu CS-NPs with an average shell thickness of 10 nm as determined with scanning electron microscopy, high-resolution transmission electron microscopy and energy-dispersive X-ray spectroscopy measurements. An analytical model that relies on classical kinetic gas theory is used to describe the deposition of Cu shell atoms on top of existing Ni cores. Its predictive power and possible implications for the growth of heterostructured NP in gas condensation processes are discussed.
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