Plasmonic nanomaterials with multiple components and designed structures show diverse properties and functions owing to the synergistic effects of the different components. Engineering the compositional and structural complexity of plasmonic nanomaterials is a powerful technique for expanding their range of applications. A facile approach to an unprecedented dart‐like type of nanostructure with AgPd bimetal selectively deposited at one end of Au nanobipyramids, forming AgPd nanodarts, is reported here. The synthetic process involves both galvanic replacement and Ostwald ripening. The morphological evolution of the AgPd nanodarts is thoroughly investigated and the growth mechanism is put forward. The as‐obtained AgPd nanodarts exhibit an outstanding photothermal conversion efficiency and peroxidase activity, which make them powerful for photothermally–catalytically combined tumor organoid ablation. In addition, two types of AgPd nanodart‐derived single‐end nanostructures, AgPd@ZIF‐8, and AgPd@TiO2 nanodarts, are prepared for the first time. The ZIF‐8 and TiO2 shell are preferentially coated at the AgPd end of the AgPd nanodarts, respectively. Both AgPd@ZIF‐8 and AgPd@TiO2 nanodarts show superior antimicrobial activities. The protocol and concept of modulating the structure of the nanodarts in this work can be extended to the development of a new class of plasmonic nanostructures with multifunctionalities.

中文翻译：

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通过金纳米双锥一端沉积合成多功能等离子体纳米镖，用于肿瘤类器官消融和抗菌应用

由于不同组分的协同效应，具有多种组分和设计结构的等离子体纳米材料表现出不同的性能和功能。设计等离子体纳米材料的组成和结构复杂性是扩大其应用范围的强大技术。本文报道了一种前所未有的飞镖状纳米结构的简便方法，其中银钯双金属选择性沉积在金纳米双锥体的一端，形成银钯纳米飞镖。合成过程涉及电偶置换和奥斯特瓦尔德熟化。深入研究了 AgPd 纳米镖的形态演化并提出了生长机制。所获得的银钯纳米飞镖表现出出色的光热转换效率和过氧化物酶活性，这使得它们能够有效地用于光热催化联合肿瘤类器官消融。此外，两种类型的AgPd纳米飞镖衍生的单端纳米结构，AgPd@ZIF-8和AgPd@TiO2纳米飞镖，首次制备。 ZIF-8 和 TiO2壳优先分别涂覆在 AgPd 纳米镖的 AgPd 端。 AgPd@ZIF-8 和 AgPd@TiO2纳米飞镖表现出优异的抗菌活性。这项工作中调节纳米飞镖结构的协议和概念可以扩展到开发一类具有多功能性的新型等离子体纳米结构。