Gold and alloy nanoparticles in solution and thin film assembly: Spectrophotometric determination of molar absorptivity

Mathew M. Maye; Li Han; Nancy N. Kariuki; Nam K. Ly; Wai Ben Chan; Jin Luo; Chuan Jian Zhong

doi:10.1016/S0003-2670(03)00986-3

Gold and alloy nanoparticles in solution and thin film assembly: Spectrophotometric determination of molar absorptivity

Mathew M. Maye, Li Han, Nancy N. Kariuki, Nam K. Ly, Wai Ben Chan, Jin Luo, Chuan Jian Zhong

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

112 Scopus citations

Abstract

The spectrophotometric determination of molar absorptivities of the surface plasmon (SP) resonance for gold and gold-silver nanoparticles is reported. The importance of the optical parameter for assessing concentrations of nanoparticles in solution reactions and for estimating thickness of thin film assembly of nanoparticles is highlighted. The high monodispersity (5.6±0.4nm) of decanethiolate-capped gold nanoparticles produced by thermally activated processing protocol served as a model system, which yielded an ε value of 1.1×10⁷M^-1cm^-1. This value was also compared with values determined similarly for nanoparticles of different core sizes and compositions, including decanethiolate-capped gold (1.9nm), gold-silver alloy (2.7 and 5.6nm), and citrate-capped gold nanoparticles (13.4nm). The determined ε values are used for the thickness estimation of thin film assembly of gold nanoparticles linked by 1,9-nonanedithiol (NDT) and the concentration calculation of nanoparticles in a solution reaction. The results have important implications for quantitative assessment of nanoparticle-related reactivities and structures.

Original language	English (US)
Pages (from-to)	17-27
Number of pages	11
Journal	Analytica Chimica Acta
Volume	496
Issue number	1-2
DOIs	https://doi.org/10.1016/S0003-2670(03)00986-3
State	Published - Oct 31 2003
Externally published	Yes

Keywords

Gold nanoparticles
Gold-silver alloy
Molar absorptivity
Spectrophotometric determination

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Environmental Chemistry
Spectroscopy

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10.1016/S0003-2670(03)00986-3

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title = "Gold and alloy nanoparticles in solution and thin film assembly: Spectrophotometric determination of molar absorptivity",

abstract = "The spectrophotometric determination of molar absorptivities of the surface plasmon (SP) resonance for gold and gold-silver nanoparticles is reported. The importance of the optical parameter for assessing concentrations of nanoparticles in solution reactions and for estimating thickness of thin film assembly of nanoparticles is highlighted. The high monodispersity (5.6±0.4nm) of decanethiolate-capped gold nanoparticles produced by thermally activated processing protocol served as a model system, which yielded an ε value of 1.1×107M-1cm-1. This value was also compared with values determined similarly for nanoparticles of different core sizes and compositions, including decanethiolate-capped gold (1.9nm), gold-silver alloy (2.7 and 5.6nm), and citrate-capped gold nanoparticles (13.4nm). The determined ε values are used for the thickness estimation of thin film assembly of gold nanoparticles linked by 1,9-nonanedithiol (NDT) and the concentration calculation of nanoparticles in a solution reaction. The results have important implications for quantitative assessment of nanoparticle-related reactivities and structures.",

keywords = "Gold nanoparticles, Gold-silver alloy, Molar absorptivity, Spectrophotometric determination",

author = "Maye, {Mathew M.} and Li Han and Kariuki, {Nancy N.} and Ly, {Nam K.} and Chan, {Wai Ben} and Jin Luo and Zhong, {Chuan Jian}",

note = "Funding Information: Financial support of this work from the Petroleum Research Fund administered by the American Chemical Society and the 3M Corporation is gratefully acknowledged. We also thank Dr. V. Jones for helpful discussion in nanoparticle size analysis. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2003",

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doi = "10.1016/S0003-2670(03)00986-3",

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T1 - Gold and alloy nanoparticles in solution and thin film assembly

T2 - Spectrophotometric determination of molar absorptivity

AU - Maye, Mathew M.

AU - Han, Li

AU - Kariuki, Nancy N.

AU - Ly, Nam K.

AU - Chan, Wai Ben

AU - Luo, Jin

AU - Zhong, Chuan Jian

N1 - Funding Information: Financial support of this work from the Petroleum Research Fund administered by the American Chemical Society and the 3M Corporation is gratefully acknowledged. We also thank Dr. V. Jones for helpful discussion in nanoparticle size analysis. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2003/10/31

Y1 - 2003/10/31

N2 - The spectrophotometric determination of molar absorptivities of the surface plasmon (SP) resonance for gold and gold-silver nanoparticles is reported. The importance of the optical parameter for assessing concentrations of nanoparticles in solution reactions and for estimating thickness of thin film assembly of nanoparticles is highlighted. The high monodispersity (5.6±0.4nm) of decanethiolate-capped gold nanoparticles produced by thermally activated processing protocol served as a model system, which yielded an ε value of 1.1×107M-1cm-1. This value was also compared with values determined similarly for nanoparticles of different core sizes and compositions, including decanethiolate-capped gold (1.9nm), gold-silver alloy (2.7 and 5.6nm), and citrate-capped gold nanoparticles (13.4nm). The determined ε values are used for the thickness estimation of thin film assembly of gold nanoparticles linked by 1,9-nonanedithiol (NDT) and the concentration calculation of nanoparticles in a solution reaction. The results have important implications for quantitative assessment of nanoparticle-related reactivities and structures.

AB - The spectrophotometric determination of molar absorptivities of the surface plasmon (SP) resonance for gold and gold-silver nanoparticles is reported. The importance of the optical parameter for assessing concentrations of nanoparticles in solution reactions and for estimating thickness of thin film assembly of nanoparticles is highlighted. The high monodispersity (5.6±0.4nm) of decanethiolate-capped gold nanoparticles produced by thermally activated processing protocol served as a model system, which yielded an ε value of 1.1×107M-1cm-1. This value was also compared with values determined similarly for nanoparticles of different core sizes and compositions, including decanethiolate-capped gold (1.9nm), gold-silver alloy (2.7 and 5.6nm), and citrate-capped gold nanoparticles (13.4nm). The determined ε values are used for the thickness estimation of thin film assembly of gold nanoparticles linked by 1,9-nonanedithiol (NDT) and the concentration calculation of nanoparticles in a solution reaction. The results have important implications for quantitative assessment of nanoparticle-related reactivities and structures.

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KW - Spectrophotometric determination

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Gold and alloy nanoparticles in solution and thin film assembly: Spectrophotometric determination of molar absorptivity

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