Synthesis of Hybrid Au-In2O3 Nanoparticles Exhibiting Dual Plasmonic Resonance
Hybrid nanoparticles composed of multiple material systems provide a platform for studying the coupling between nanoparticles with distinct properties. Here, we describe a nontraditional synthetic pathway to Au-In2O3 hybrid nanoparticles that contain two distinct plasmonic domains: Au, with a locali...
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Published in | Chemistry of materials Vol. 26; no. 20; pp. 5900 - 5904 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
American Chemical Society
28.10.2014
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Online Access | Get full text |
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Abstract | Hybrid nanoparticles composed of multiple material systems provide a platform for studying the coupling between nanoparticles with distinct properties. Here, we describe a nontraditional synthetic pathway to Au-In2O3 hybrid nanoparticles that contain two distinct plasmonic domains: Au, with a localized surface plasmon resonance (LSPR) in the visible, and In2O3, with a LSPR in the mid-infrared. The hybrid nanocrystals are produced by slowly introduce In(III) stock solution to Au nanoparticle seeds using a syringe pump. Rather than forming through a traditional heterogeneous seeded-growth process, a series of in situ and ex situ studies reveal an alternate multistep pathway. The Au nanoparticles first combine with In to form an alloy of Au and In, which is colloidally stable up to 300 °C in 1-octadecene. The Au-In alloy nanoparticles then transform into intermetallic AuIn2 nanoparticles that are surrounded by a shell of amorphous indium oxide (AuIn2@InO x ), followed by the final Au-In2O3 heterodimers upon complete phase segregation. |
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AbstractList | Hybrid nanoparticles composed of multiple material systems provide a platform for studying the coupling between nanoparticles with distinct properties. Here, we describe a nontraditional synthetic pathway to Au-In2O3 hybrid nanoparticles that contain two distinct plasmonic domains: Au, with a localized surface plasmon resonance (LSPR) in the visible, and In2O3, with a LSPR in the mid-infrared. The hybrid nanocrystals are produced by slowly introduce In(III) stock solution to Au nanoparticle seeds using a syringe pump. Rather than forming through a traditional heterogeneous seeded-growth process, a series of in situ and ex situ studies reveal an alternate multistep pathway. The Au nanoparticles first combine with In to form an alloy of Au and In, which is colloidally stable up to 300 °C in 1-octadecene. The Au-In alloy nanoparticles then transform into intermetallic AuIn2 nanoparticles that are surrounded by a shell of amorphous indium oxide (AuIn2@InO x ), followed by the final Au-In2O3 heterodimers upon complete phase segregation. |
Author | Gordon, Thomas R Schaak, Raymond E |
AuthorAffiliation | The Pennsylvania State University Department of Chemistry and Materials Research Institute |
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ContentType | Journal Article |
DOI | 10.1021/cm502396d |
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Title | Synthesis of Hybrid Au-In2O3 Nanoparticles Exhibiting Dual Plasmonic Resonance |
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