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Title: Engineering inorganic hybrid nanoparticles: Tuning combination fashions of gold, platinum, and iron oxide
Authors: Zhang, H.-T. 
Ding, J. 
Chow, G.-M. 
Dong, Z.-L.
Issue Date: 18-Nov-2008
Citation: Zhang, H.-T., Ding, J., Chow, G.-M., Dong, Z.-L. (2008-11-18). Engineering inorganic hybrid nanoparticles: Tuning combination fashions of gold, platinum, and iron oxide. Langmuir 24 (22) : 13197-13202. ScholarBank@NUS Repository.
Abstract: Multistep colloidal chemical routes were employed to synthesize Pt/Au, Pt/iron oxide (IO), and Au/Pt/IO hybrid nanoparticles (NPs). The starting templates, Pt NPs, were synthesized by controlling the decomposition kinetics of platinum acetylacetonate in oleylamine. The morphologies of binary metal Pt/Au hybrid NPs were modulated by controllable attachment of Au nanoscale domains to Pt templates. Similarly, Pt/IO and Au/Pt/IO hybrid NPs were fabricated by the controllable attachment of Fe to the Pt or Pt/Au template NPs. The noble metal domains of as-prepared hybrid NPs had face center cubic crystal structures and did not alloy, as verified by high resolution transmission electron microscopy and X-ray diffraction spectrometry. X-ray diffraction spectrometry study indicates that the IO domains in the as-prepared NPs have a spinel structure. UV-vis study of binary metal Pt/Au hybrid NPs revealed that they have a characteristic plasmon resonance around 525 nm, while dumbbell-like Au/Pt/IO NPs had a plasmon resonance around 600 nm. Furthermore, magnetism study of the binary Pt-IO NPs clearly indicated that the interfacial interactions between Pt and IO domains could result in a shift of the blocking temperature. © 2008 American Chemical Society.
Source Title: Langmuir
ISSN: 07437463
DOI: 10.1021/la802805w
Appears in Collections:Staff Publications

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