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Laboratoire de Réactivité de Surface
UMR 7197 Sorbonne Université-CNRS

Cover - The Journal of Physical Chemistry C


STEM elemental mapping reveals that pH-triggered reduction of silver ions occurs on the inner walls of porous gold nanoshell (AuNS) particles. The reduction initially relies on sacrificial silver ions released into the surrounding bath during galvanic replacement. The reduction proceeds upon the external addition of silver ions until a solid silver core is formed inside the AuNS particles. Subsequent reduction takes place on the external surface of the solidified AuNS particle, resulting in a layered and compositionally complex nanoparticle.




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