Asymmetric patchy Ag/Cu Janus nanoparticles (NPs) were synthesized via a “seed-mediated” approach. This is the first report of synthesis of nanometer sized metal-based Janus NPs without using complicated methods. Selective adsorption of the surfactant onto the seed NPs leads to the formation of Janus type structure. Subsequently the reduction potential of Ag⁺/Ag⁰ and Cu²⁺/Cu⁰ systems directs the formation of the “patch”. The patchy Janus NPs show significant antifungal activity towards a potent rice pathogen thus offering the prospect of future application in crop protection.

中文翻译：

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不对称斑块状Janus Ag / Cu颗粒的简便合成及其抗真菌活性的研究

通过“种子介导”的方法合成了不对称的片状Ag / Cu Janus纳米颗粒（NPs）。这是不使用复杂方法即可合成纳米级金属基Janus NP的首次报道。表面活性剂对种子NP的选择性吸附导致Janus型结构的形成。随后，Ag ⁺ / Ag ⁰和Cu ²⁺ / Cu ⁰系统的还原电位指导“补丁”的形成。片状Janus NPs对强效水稻病原体显示出显着的抗真菌活性，因此为将来在作物保护中的应用提供了前景。