Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges

Lenzi J. Williams; Anne Marie Dowgiallo; Kenneth L. Knappenberger

doi:10.1039/c3cp51420j

Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges

Lenzi J. Williams, Anne Marie Dowgiallo, Kenneth L. Knappenberger

Chemistry

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

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.

Original language	English (US)
Pages (from-to)	11840-11845
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	28
DOIs	https://doi.org/10.1039/c3cp51420j
State	Published - Jul 28 2013

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1039/c3cp51420j

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title = "Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges",

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.",

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T1 - Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges

AU - Williams, Lenzi J.

AU - Dowgiallo, Anne Marie

AU - Knappenberger, Kenneth L.

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Y1 - 2013/7/28

N2 - 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.

AB - 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.

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JO - Physical Chemistry Chemical Physics

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ER -

Plasmonic nanoparticle networks formed using iron porphyrin molecular bridges

Abstract

All Science Journal Classification (ASJC) codes

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