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Issue 28, 2013
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Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges

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Abstract

The adsorption orientation of the iron(III) tetrakis(1-methyl-4-pyridyl)porphine (FeTMPyP) μ-oxo-bridged dimer species located in the inter-particle gap of solid gold nanosphere (SGN) and hollow gold nanosphere (HGN) networks was studied using a combination of linear extinction and surface-enhanced Raman Scattering (SERS) measurements. Nanoparticle aggregation was accomplished by μM additions of iron porphyrin to the colloidal SGN and HGN solutions. Aggregation was monitored by measuring the UV-Visible-NIR extinction spectra of the nanoparticle systems; a broadened and red-shifted localized surface plasmon resonance (LSPR), relative to the LSPR of the isolated nanoparticles, indicated aggregate formation. In conjunction with the LSPR extinction measurements, wavelength-dependent SERS measurements were used to determine the orientation of the FeTMPyP with respect to the SGN and HGN surfaces.

Graphical abstract: Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges

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Publication details

The article was received on 03 Apr 2013, accepted on 29 May 2013 and first published on 30 May 2013


Article type: Paper
DOI: 10.1039/C3CP51420J
Citation: Phys. Chem. Chem. Phys., 2013,15, 11840-11845

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    Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges

    L. J. Williams, A. Dowgiallo and K. L. Knappenberger, Phys. Chem. Chem. Phys., 2013, 15, 11840
    DOI: 10.1039/C3CP51420J

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