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Dynamic inclusion complexes of metal nanoparticles inside nanocups

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https://onlinelibrary.wiley.com/doi/10.1002/anie.201500635
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Citation

Alarcon-Correa, M., Lee, T. C., & Fischer, P. (2015). Dynamic inclusion complexes of metal nanoparticles inside nanocups. Angewandte Chemie International Edition, 54(23), 6730-6734. doi:10.1002/anie.201500635.


Cite as: https://hdl.handle.net/21.11116/0000-000B-09AE-8
Abstract
Host-guest inclusion complexes are abundant in molecular systems and of fundamental importance in living organisms. Realizing a colloidal analogue of a molecular dynamic inclusion complex is challenging because inorganic nanoparticles (NPs) with a well-defined cavity and portal are difficult to synthesize in high yield and with good structural fidelity. Herein, a generic strategy towards the fabrication of dynamic 1:1 inclusion complexes of metal nanoparticles inside oxide nanocups with high yield (>70%) and regiospecificity (>90%) by means of a reactive double Janus nanoparticle intermediate is reported. Experimental evidence confirms that the inclusion complexes are formed by a kinetically controlled mechanism involving a delicate interplay between bipolar galvanic corrosion and alloying-dealloying oxidation. Release of the NP guest from the nanocups can be efficiently triggered by an external stimulus.