Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstr. 15, 04318, Leipzig, Germany.
Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstr. 15, 04318, Leipzig, Germany ; Translationszentrum für Regenerative Medizin, Universität Leipzig, 04103 Leipzig, Germany ; Fakultät für Physik und Geowissenschaften, Universität Leipzig, 04103 Leipzig, Germany.
Beilstein J Nanotechnol. 2014 Apr 14;5:466-75. doi: 10.3762/bjnano.5.54. eCollection 2014.
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.
在广泛的应用中，具有可控性能的各向异性磁核壳纳米粒子（CS-NPs）是非常需要的。在此背景下，我们开发了一种依靠（可选脉冲）直流等离子体气体冷凝来合成异质结构磁性核壳纳米粒子的装置。我们通过扫描电子显微镜、高分辨率透射电子显微镜和能量色散 X 射线光谱测量，证明了具有高度可调尺寸和形状的元素镍纳米粒子以及平均壳厚度为 10nm 的 Ni@Cu CS-NPs 的合成。我们使用依赖于经典动力学气体理论的分析模型来描述在现有 Ni 核上沉积 Cu 壳原子的过程。讨论了该模型的预测能力及其对气体冷凝过程中异质结构 NP 生长的可能影响。
