Abstract

The rational design of complex nanostructures is of paramount importance to gain control over their chemical and physical properties. Recently, magnetic-plasmonic heterostructured nanocrystals have been recognized as key players in nanomedicine as multifunctional therapeutic-diagnostic tools and in catalysis. Here we show how the properties of gold-iron oxide heterostructured nanocrystals can be tuned by chemical doping of the magnetic subunit. The divalent cations in the iron oxide were substituted with cobalt and manganese to obtain a general formula Au-MFe₂O₄ (M = Fe, Co, Mn). Magnetic properties of the heterostructures could be tuned, while maintaining well-defined plasmon resonance signatures, confirming the dual magnetic-plasmonic functional capability of these nanostructures.

中文翻译：

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金-尖晶石铁氧体异质结构纳米晶体的磁性能调制

摘要

复杂纳米结构的合理设计对于控制其化学和物理特性至关重要。近年来，磁等离子体等结构纳米晶体已被公认为纳米医学作为多功能治疗诊断工具和催化领域的关键角色。在这里，我们展示了如何通过磁性亚基的化学掺杂来调节金铁氧化物异质结构纳米晶体的性能。氧化铁中的二价阳离子被钴和锰取代，得到通式Au-MFe ₂ O ₄（M = Fe，Co，Mn）。可以调整异质结构的磁性，同时保持定义明确的等离振子共振特征，从而确认了这些纳米结构的双重磁-等离激元功能。