Despite the versatile forms of colloidal aggregates, these spontaneously formed structures are often hard to find a suitable application in nanotechnology and materials science. A determinate reason is the lack of a suitable method to capture the transiently formed and quickly evolving colloidal structures in solution. To address this challenge, a simple but highly efficient strategy is herein reported to capture the dynamic and metastable colloidal assemblies formed in an aqueous or nonaqueous solution. This process takes advantage of a recently developed Ag ion soldering reaction to realize a rapid fixation of as‐formed metastable assemblies. This method works efficiently for both solid (3D) nanoparticle aggregates and weakly bonded fractal nanoparticle chains (1D). In both cases, very high capturing speed and close to 100% efficiency are achieved to fully retain a quickly growing structure. The soldered nanochains further enable a fabrication of discrete, uniform, and functionalizable nanoparticle clusters with enriched linear conformation by mechanical shearing, which would otherwise be difficult to make. The captured products are water dispersible and mechanically robust, favoring an exploration of their properties toward possible applications. The work paves a way to previously untouched aspects of colloidal science and thus would create new chances in nanotechnology.

中文翻译：

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冻结片刻：通过银离子焊接对溶液中弱结合的动态纳米粒子组件进行高速捕获

尽管胶体聚集体具有多种形式，但这些自发形成的结构通常很难在纳米技术和材料科学中找到合适的应用。一个确定的原因是缺乏一种合适的方法来捕获溶液中瞬态形成的快速发展的胶体结构。为了解决该挑战，本文报道了一种简单但高效的策略，以捕获在水溶液或非水溶液中形成的动态且亚稳态的胶体组件。该过程利用了最近开发的银离子焊接反应的优势，可以快速固定形成的亚稳组件。此方法对于固体（3D）纳米粒子聚集体和弱结合的分形纳米粒子链（1D）均有效。在这两种情况下 实现了非常高的捕获速度和接近100％的效率，以完全保留快速增长的结构。焊接的纳米链进一步使得能够通过机械剪切来制造具有丰富的线性构象的离散的，均匀的和可官能化的纳米颗粒簇，否则将难以制造。所捕集的产品具有水分散性和机械坚固性，有利于探索其性能，以适应可能的应用。这项工作为以前未触及的胶体科学领域铺平了道路，因此将为纳米技术创造新的机会。否则很难做到。所捕集的产品具有水分散性和机械坚固性，有利于探索其性能，以适应可能的应用。这项工作为以前未触及的胶体科学领域铺平了道路，因此将为纳米技术创造新的机会。否则很难做到。所捕集的产品具有水分散性和机械坚固性，有利于探索其性能，以适应可能的应用。这项工作为以前未触及的胶体科学领域铺平了道路，因此将为纳米技术创造新的机会。