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Electric field assisted growth of highly surface enhanced Raman active gold nanotriangles
Panikkanvalappil Ravindranathan Sajanlal,
Published in
2009
Volume: 9
   
Issue: 9
Pages: 5283 - 5287
Abstract
A comparative study of the surface-enhanced Raman scattering (SERS) effect of the spherical gold nanoparticles (NPs) and highly uniform and oriented gold nanotriangles (NTs), anchored on indium tin oxide (ITO) coated conducting glass surfaces is reported. Contact and non-contact mode atomic force microscopic (AFM) analyses confirmed that all the triangles observed are equilateral and uniformly stacked. The NTs-coated ITO exhibited intense near-infrared (NIR) absorption and showed an extremely strong SERS activity than the spherical NPs. The NTs showed a very good SERS enhancement factor on the order of 4 × 10 8. The results are interpreted in terms of the increased density of hot spots on the NTs-coated surface. © 2009 American Scientific Publishers.
About the journal
JournalJournal of Nanoscience and Nanotechnology
ISSN15334880
Open AccessNo
Concepts (25)
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    AFM
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    Atomic force
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    COATED SURFACE
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    Comparative studies
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    CONDUCTING GLASS
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    ELECTRIC-FIELD ASSISTED GROWTH
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    Gold nanoparticles
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    Gold nanotriangles
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    Hot spot
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    Indium tin oxide
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    ITO
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    Near-infrared absorption
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    NON-CONTACT MODE
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    SEED-MEDIATED METHOD
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    SERS
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    SERS ENHANCEMENT
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    SURFACE ENHANCED RAMAN
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    Surface-enhanced raman scattering
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    Atomic force microscopy
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    Electric fields
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    Gold
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    Infrared devices
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    Raman scattering
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    Tin
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    Surfaces