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Title: Hybrid nanorattles of metal core and stimuli-responsive polymer shell for confined catalytic reactions
Authors: Li, G.L.
Tai, C.A.
Neoh, K.G. 
Kang, E.T. 
Yang, X.
Issue Date: Jun-2011
Source: Li, G.L., Tai, C.A., Neoh, K.G., Kang, E.T., Yang, X. (2011-06). Hybrid nanorattles of metal core and stimuli-responsive polymer shell for confined catalytic reactions. Polymer Chemistry 2 (6) : 1368-1374. ScholarBank@NUS Repository.
Abstract: Narrowly-dispersed silver@silica@poly(methacrylic acid) (Ag@SiO 2@PMAA) core-double shell hybrid nanoparticles (NPs) were first synthesized by distillation-precipitation polymerization, using silver@silica core-shell NPs from the sol-gel reaction as templates. Selective removal of the inorganic silica inner-shell from the Ag@SiO2@PMAA core-double shell hybrid NPs by HF etching produces the Ag@air@PMAA hybrid nanorattles with a Ag nanocore, PMAA shell and free space in between. The Ag nanocores, Ag@SiO 2 core-shell NPs, Ag@SiO2@PMAA core-double shell NPs and Ag@air@PMAA hybrid nanorattles were characterized by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier-transform infrared (FT-IR) spectroscopy and energy-dispersive X-ray (EDX) analysis. The as-synthesized Ag@air@PMAA hybrid nanorattles were explored as a nanoreactor system for confined catalytic reaction. The rate of catalytic reaction can be further regulated by controlling molecule diffusion in and out of the stimuli-responsive PMAA shell through the simple variation of environmental stimuli, such as salt (NaCl) concentration of the medium. © 2011 The Royal Society of Chemistry.
Source Title: Polymer Chemistry
ISSN: 17599954
DOI: 10.1039/c1py00054c
Appears in Collections:Staff Publications

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