Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Strasse 6, 01069, Dresden, Germany.
Cluster of Excellence Centre for Advancing Electronics Dresden, Technische Universität Dresden, 01062, Dresden, Germany.
Angew Chem Int Ed Engl. 2017 Dec 11;56(50):15866-15870. doi: 10.1002/anie.201708398. Epub 2017 Nov 21.
To date, it has not been possible to combine the high optical quality of silver particles with the good chemical stability and synthetic convenience in a fully aqueous system, while simultaneously allowing chemical surface functionalization. We present a synthetic pathway for future developments in information, energy and medical technology where strong optical/electronic properties are crucial. Therefore, the advantages inherent to gold are fused with the plasmonic properties of silver in a fully aqueous Au/Ag/Au core-shell shell system. These nanoparticles inherit low dispersity from their masked gold cores, yet simultaneously exhibit the strong plasmonic properties of silver. Protecting the silver surface with a thin gold layer enables oxidant stability and functionality without altering the Ag-controlled optical properties. This combines both worlds-optical quality and chemical stability-and is not limited to a specific particle shape.
迄今为止，人们还不能在完全水性的体系中，将银纳米颗粒的高光学质量与良好的化学稳定性和合成便利性结合起来，同时还能进行化学表面功能化。我们提出了一种合成途径，用于未来的信息、能源和医疗技术发展，在这些领域中，强光学/电子性质是至关重要的。因此，将固有优势与金的等离子体性质融合在完全水性的 Au/Ag/Au 核壳壳层系统中。这些纳米粒子从其被掩蔽的金核继承了低分散性，但同时表现出银的强等离子体性质。通过在银表面覆盖一层薄薄的金层，在不改变银控制的光学性质的情况下，可以提高氧化稳定性和功能性。这将两个世界——光学质量和化学稳定性——结合在一起，并且不限于特定的颗粒形状。
