Corrosion‐Protected Hybrid Nanoparticles,Advanced Science

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Corrosion‐Protected Hybrid Nanoparticles
Advanced Science ( IF 14.3 ) Pub Date : 2017-09-15 , DOI: 10.1002/advs.201700234
Hyeon-Ho Jeong _{1,

2} , Mariana Alarcón-Correa _{1,

3} , Andrew G Mark ₁ , Kwanghyo Son ₁ , Tung-Chun Lee _{1,

4} , Peer Fischer _{1,

3}

Affiliation

Nanoparticles composed of functional materials hold great promise for applications due to their unique electronic, optical, magnetic, and catalytic properties. However, a number of functional materials are not only difficult to fabricate at the nanoscale, but are also chemically unstable in solution. Hence, protecting nanoparticles from corrosion is a major challenge for those applications that require stability in aqueous solutions and biological fluids. Here, this study presents a generic scheme to grow hybrid 3D nanoparticles that are completely encapsulated by a nm thick protective shell. The method consists of vacuum‐based growth and protection, and combines oblique physical vapor deposition with atomic layer deposition. It provides wide flexibility in the shape and composition of the nanoparticles, and the environments against which particles are protected. The work demonstrates the approach with multifunctional nanoparticles possessing ferromagnetic, plasmonic, and chiral properties. The present scheme allows nanocolloids, which immediately corrode without protection, to remain functional, at least for a week, in acidic solutions.

中文翻译：

防腐蚀混合纳米颗粒

由功能材料组成的纳米颗粒由于其独特的电子、光学、磁性和催化特性而具有广阔的应用前景。然而，许多功能材料不仅难以在纳米尺度上制造，而且在溶液中化学性质不稳定。因此，保护纳米粒子免受腐蚀对于那些需要在水溶液和生物液体中保持稳定性的应用来说是一个主要挑战。在这里，这项研究提出了一种生长混合 3D 纳米粒子的通用方案，这些纳米粒子完全被纳米厚的保护壳包裹。该方法由真空生长和保护组成，并将倾斜物理气相沉积与原子层沉积相结合。它在纳米颗粒的形状和成分以及保护颗粒的环境方面提供了广泛的灵活性。这项工作展示了具有铁磁、等离子体和手性特性的多功能纳米颗粒的方法。本方案允许纳米胶体在没有保护的情况下立即腐蚀，在酸性溶液中至少一周保持功能。

更新日期：2017-09-15

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