摘要
While thiolate-protected Au nanoclusters （NCs） have drawn considerable interest in various fields, their poor stability in aqueous solution remains a major hurdle for practical applications. Here, we report a unique strategy based on ligand-shell engineering to improve the stability of thiolated Au NCs in solution. By employing two thiol-terminated ligands having oppositely charged functional groups on the surface of the NCs, we demonstrate that the electrostatic attraction between the oppositely charged functional groups of neighboring ligands could amplify the coordination among surface ligands, leading to the formation of pseudo-cage-like structures on the NC surface that could offer higher protection to the Au core in aqueous solution. The strategy developed in this study could be extended to toward practical applications. other metal NCs, further paving the way
当保护 thiolate 的 Au nanoclusters (NC ) 在各种各样的领域里拉了可观的兴趣时，他们在水的答案的差的稳定性为实际应用仍然是一个主要障碍。这里，我们基于设计在答案改进 thiolated Au NC 的稳定性的 ligand 壳报导唯一的策略。由采用二 终止thiol 的 ligands 相对地在 NC 的表面上为功能的组充电了，我们证明在附近的 ligands 的相对地为充电的功能的组之间的静电的吸引力能在表面 ligands 之中放大协作，在能在水的答案把更高的保护提供给 Au 核心的 NC 表面上导致 pseudo-cage-like 结构的形成。在这研究开发的策略能被扩大到另外的金属 NC，进一步向实际应用程序铺平道路。
