title: Dynamic inclusion complexes of metal nanoparticles inside nanocups.
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.
authors.affiliation: Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart (Germany).|Inst. for Phys. Chem., Univ. Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany).
authors.forename: Mariana
authors.initials: M
authors.lastname: Alarcón-Correa
authors.affiliation: Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart (Germany). tungchun.lee@ucl.ac.uk.|Institute for Materials Discovery, University College London, Kathleen Lonsdale Building, Gower Place, London WC1E 6BT (UK). tungchun.lee@ucl.ac.uk.
authors.forename: Tung-Chun
authors.initials: TC
authors.lastname: Lee
authors.affiliation: Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart (Germany). fischer@is.mpg.de.|Inst. for Phys. Chem., Univ. Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany). fischer@is.mpg.de.
authors.forename: Peer
authors.initials: P
authors.lastname: Fischer
mesh_terms: D006046:Gold / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D010087:Oxides; D012834:Silver; D006046:Gold; D012822:Silicon Dioxide
keywords: Janus nanoparticles; host-guest systems; inclusion complexes; nanocups; nanostructures