Quantitative assessment of surface-enhanced resonance Raman scattering for the analysis of dyes on colloidal silver

J.C. Jones, C. McLaughlin, D. Littlejohn, D.A. Sadler, D. Graham, W.E. Smith

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Factors that affect quantitative analysis by surface-enhanced resonance Raman scattering (SERRS) have been investigated using azobenzotriazol and reactive dyes. Preaggregation of the silver colloid was the most effective method to obtain repeatable and reproducible scattering. Aggregation by poly(L-lysine) or spermine provided better precision than aggregation by sodium chloride or nitric acid. Repeatable quantitative analysis was achieved with the azobenzotriazol dyes. A linear calibration graph was obtained over different concentration ranges below 10(-8) M, depending on the nature of the colloid. Calculations estimate that 10(-8) M is the concentration at which monolayer coverage of the dye on the silver colloid is achieved. Above 10(-8) M, there was only a minor increase in the scattering intensity from the azobenzotriazol dyes. In contrast, the reactive dyes did not give a response proportional to concentration over the range studied. The different responses obtained for the two types of dye are believed to be caused by differences in the nature of the interaction of the molecules with the silver surface. The conclusion reached is that control of the colloid preparation, aggregation process, and surface chemistry are essential for successful quantitative analysis of dyes on colloidal silver by SERRS.
LanguageEnglish
Pages596-601
Number of pages5
JournalAnalytical Chemistry
Volume71
Issue number3
DOIs
Publication statusPublished - 1 Feb 1999

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Raman scattering
Coloring Agents
Agglomeration
Colloids
Chemical analysis
Scattering
Nitric Acid
Spermine
colloidal silver
Surface chemistry
Silver
Sodium Chloride
Lysine
Monolayers
Calibration
Molecules

Keywords

  • chemistry
  • analytical
  • Raman scattering
  • dyes
  • colloidal silver

Cite this

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abstract = "Factors that affect quantitative analysis by surface-enhanced resonance Raman scattering (SERRS) have been investigated using azobenzotriazol and reactive dyes. Preaggregation of the silver colloid was the most effective method to obtain repeatable and reproducible scattering. Aggregation by poly(L-lysine) or spermine provided better precision than aggregation by sodium chloride or nitric acid. Repeatable quantitative analysis was achieved with the azobenzotriazol dyes. A linear calibration graph was obtained over different concentration ranges below 10(-8) M, depending on the nature of the colloid. Calculations estimate that 10(-8) M is the concentration at which monolayer coverage of the dye on the silver colloid is achieved. Above 10(-8) M, there was only a minor increase in the scattering intensity from the azobenzotriazol dyes. In contrast, the reactive dyes did not give a response proportional to concentration over the range studied. The different responses obtained for the two types of dye are believed to be caused by differences in the nature of the interaction of the molecules with the silver surface. The conclusion reached is that control of the colloid preparation, aggregation process, and surface chemistry are essential for successful quantitative analysis of dyes on colloidal silver by SERRS.",
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Quantitative assessment of surface-enhanced resonance Raman scattering for the analysis of dyes on colloidal silver. / Jones, J.C.; McLaughlin, C.; Littlejohn, D.; Sadler, D.A.; Graham, D.; Smith, W.E.

In: Analytical Chemistry, Vol. 71, No. 3, 01.02.1999, p. 596-601.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Quantitative assessment of surface-enhanced resonance Raman scattering for the analysis of dyes on colloidal silver

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AU - McLaughlin, C.

AU - Littlejohn, D.

AU - Sadler, D.A.

AU - Graham, D.

AU - Smith, W.E.

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AB - Factors that affect quantitative analysis by surface-enhanced resonance Raman scattering (SERRS) have been investigated using azobenzotriazol and reactive dyes. Preaggregation of the silver colloid was the most effective method to obtain repeatable and reproducible scattering. Aggregation by poly(L-lysine) or spermine provided better precision than aggregation by sodium chloride or nitric acid. Repeatable quantitative analysis was achieved with the azobenzotriazol dyes. A linear calibration graph was obtained over different concentration ranges below 10(-8) M, depending on the nature of the colloid. Calculations estimate that 10(-8) M is the concentration at which monolayer coverage of the dye on the silver colloid is achieved. Above 10(-8) M, there was only a minor increase in the scattering intensity from the azobenzotriazol dyes. In contrast, the reactive dyes did not give a response proportional to concentration over the range studied. The different responses obtained for the two types of dye are believed to be caused by differences in the nature of the interaction of the molecules with the silver surface. The conclusion reached is that control of the colloid preparation, aggregation process, and surface chemistry are essential for successful quantitative analysis of dyes on colloidal silver by SERRS.

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