Journal
RSC ADVANCES
Volume 4, Issue 65, Pages 34294-34302Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra07281b
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Funding
- National Natural Science Foundation of China [41273093, 21175101, 90913013]
- National Major Scientific Instruments and Device Development Project [2012YQ16000701]
- Foundation of China Geological Survey [12120113015200]
- Fundamental Research Funds for the Central Universities [2042014kf0260]
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Noble metal nanoparticles (NPs) are spontaneously enfolded by aqueous coordination networks generated by reacting 2,5-dimercapto-1,3,4-thiadiazole (DMcT) with silver nanostructures in zero-oxidation state, and finally form novel hollow Au@Ag@infinite coordination polymers core-shell nanostructures (Au@Ag@void@ICPs). In this synthesis, DMcT molecules not only act as the bridging ligands but also directly oxidize Ag-0 to Ag+ ions for the formation of amorphous DMcT-Ag ICPs. And, the sizes of the shell and void of Au@Ag@void@ICPs can be facilely tuned by modulating the amount of DMcT and the size ratio of Au@Ag NPs, respectively. Due to the high structural tailorability of DMcT-Ag ICPs, multi-encapsulation of Au@Ag NPs with either small organic molecules or biological macromolecules (e. g., enzymes) can be achieved to fabricate multi-functional core-shell nanostructures. A case in point is that a highly sensitive biosensor of H2O2 with a wider detection window has been constructed based on the prepared metal NPs-ICPs-enzyme composites and resonance Raman scattering. This study provides not only a new template for tailoring hollow core-shell nanomaterials but also a versatile platform for chemical (bio) sensing.
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