Bimetallic Janus structures are of great importance as their fantastic properties arise from the physical separation and the synergistic effects of the composed materials. Currently, the effective control of the Janus structure still remains a challenge compared to that of the conventional core–shell configuration and thus is highly desired. In this work, strong thiol ligands were used for tuning the interfacial energy between the Au seeds and the Cu deposit to induce the transformation of the Au–Cu core–shell to the asymmetric Janus structures. As a result of effective ligand control, a series of Au–Cu Janus structures using Au nanospheres, Au nanorods, and triangular Au nanoplates as seeds were successfully obtained. Most importantly, the Janus degree of the Au–Cu Janus structures can be readily tuned by varying the molecular structure and the amount of thiol ligands. We believe that the effective strong ligand-mediated interfacial energy control achieved in the Au–Cu system could tune bimetallic Janus structures with different metal–metal combinations, which would help in the precise control of bimetallic nanostructures. In addition, further exploration of the strong ligand control in multicomponent systems may open new doors toward the design and synthesis of sophisticated functional nanomaterials with promising properties.

中文翻译：

---

通过强配体介导的界面能控制调节 Au-Cu Janus 结构

双金属 Janus 结构非常重要，因为它们的奇妙特性来自于组合材料的物理分离和协同效应。目前，与传统的核壳结构相比，Janus 结构的有效控制仍然是一个挑战，因此是非常需要的。在这项工作中，强硫醇配体用于调节 Au 种子和 Cu 沉积物之间的界面能，以诱导 Au-Cu 核壳向不对称 Janus 结构的转变。由于有效的配体控制，成功地获得了一系列以金纳米球、金纳米棒和三角形金纳米片为种子的金铜两面体结构。最重要的是，通过改变分子结构和硫醇配体的数量，可以很容易地调整 Au-Cu Janus 结构的 Janus 程度。我们相信，在 Au-Cu 体系中实现的有效的强配体介导的界面能控制可以调整具有不同金属-金属组合的双金属 Janus 结构，这将有助于双金属纳米结构的精确控制。此外，对多组分系统中强配体控制的进一步探索可能为设计和合成具有前景的复杂功能纳米材料打开新的大门。这将有助于精确控制双金属纳米结构。此外，对多组分系统中强配体控制的进一步探索可能为设计和合成具有前景的复杂功能纳米材料打开新的大门。这将有助于精确控制双金属纳米结构。此外，对多组分系统中强配体控制的进一步探索可能为设计和合成具有前景的复杂功能纳米材料打开新的大门。