Electrochemical adsorption and covalent attachment of erythrosin to modified tin dioxide electrodes and measurement of the photocurrent sensitization to visible wavelength light

David D. Hawn, Neal R Armstrong

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Erythrosin (2,4,5,7-tetraiodofluorescein) has been attached to SnO2 electrode surfaces either through electrochemical adsorption or covalent attachment. SnO2 electrodes modified with mercaptopropyltrimethoxysilane, 3-(2-aminoethyl)propyltriethoxysilane, or γ-aminopropyltrimethoxysilane showed a considerable enhancement of the currents passed during oxidation of erythrosin and a deposition of several monolayers of active chromophore. Erythrosin was covalently attached to the silane-modified SnO2 surfaces by means of an amide bond or by the formation of a thiol bond. Small surface concentrations of the adsorbed and covalently attached dye were easily detected by monitoring the I(3d3/2,5/2) x-ray photoelectron transitions. Sensitization of the SnO2 current/voltage response to visible wavelength light was observed for both the adsorbed and covalently attached dye electrodes. Enhanced stability and efficiency of the photocurrent response was observed for the covalently attached vs. adsorbed dye molecules.

Original languageEnglish (US)
Pages (from-to)1288-1295
Number of pages8
JournalJournal of Physical Chemistry
Volume82
Issue number11
StatePublished - 1978
Externally publishedYes

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Erythrosine
Tin dioxide
dioxides
Photocurrents
attachment
photocurrents
tin
Coloring Agents
Dyes
dyes
Adsorption
Wavelength
Fluoresceins
Electrodes
adsorption
electrodes
wavelengths
Silanes
Chromophores
Electron transitions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

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title = "Electrochemical adsorption and covalent attachment of erythrosin to modified tin dioxide electrodes and measurement of the photocurrent sensitization to visible wavelength light",
abstract = "Erythrosin (2,4,5,7-tetraiodofluorescein) has been attached to SnO2 electrode surfaces either through electrochemical adsorption or covalent attachment. SnO2 electrodes modified with mercaptopropyltrimethoxysilane, 3-(2-aminoethyl)propyltriethoxysilane, or γ-aminopropyltrimethoxysilane showed a considerable enhancement of the currents passed during oxidation of erythrosin and a deposition of several monolayers of active chromophore. Erythrosin was covalently attached to the silane-modified SnO2 surfaces by means of an amide bond or by the formation of a thiol bond. Small surface concentrations of the adsorbed and covalently attached dye were easily detected by monitoring the I(3d3/2,5/2) x-ray photoelectron transitions. Sensitization of the SnO2 current/voltage response to visible wavelength light was observed for both the adsorbed and covalently attached dye electrodes. Enhanced stability and efficiency of the photocurrent response was observed for the covalently attached vs. adsorbed dye molecules.",
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TY - JOUR

T1 - Electrochemical adsorption and covalent attachment of erythrosin to modified tin dioxide electrodes and measurement of the photocurrent sensitization to visible wavelength light

AU - Hawn, David D.

AU - Armstrong, Neal R

PY - 1978

Y1 - 1978

N2 - Erythrosin (2,4,5,7-tetraiodofluorescein) has been attached to SnO2 electrode surfaces either through electrochemical adsorption or covalent attachment. SnO2 electrodes modified with mercaptopropyltrimethoxysilane, 3-(2-aminoethyl)propyltriethoxysilane, or γ-aminopropyltrimethoxysilane showed a considerable enhancement of the currents passed during oxidation of erythrosin and a deposition of several monolayers of active chromophore. Erythrosin was covalently attached to the silane-modified SnO2 surfaces by means of an amide bond or by the formation of a thiol bond. Small surface concentrations of the adsorbed and covalently attached dye were easily detected by monitoring the I(3d3/2,5/2) x-ray photoelectron transitions. Sensitization of the SnO2 current/voltage response to visible wavelength light was observed for both the adsorbed and covalently attached dye electrodes. Enhanced stability and efficiency of the photocurrent response was observed for the covalently attached vs. adsorbed dye molecules.

AB - Erythrosin (2,4,5,7-tetraiodofluorescein) has been attached to SnO2 electrode surfaces either through electrochemical adsorption or covalent attachment. SnO2 electrodes modified with mercaptopropyltrimethoxysilane, 3-(2-aminoethyl)propyltriethoxysilane, or γ-aminopropyltrimethoxysilane showed a considerable enhancement of the currents passed during oxidation of erythrosin and a deposition of several monolayers of active chromophore. Erythrosin was covalently attached to the silane-modified SnO2 surfaces by means of an amide bond or by the formation of a thiol bond. Small surface concentrations of the adsorbed and covalently attached dye were easily detected by monitoring the I(3d3/2,5/2) x-ray photoelectron transitions. Sensitization of the SnO2 current/voltage response to visible wavelength light was observed for both the adsorbed and covalently attached dye electrodes. Enhanced stability and efficiency of the photocurrent response was observed for the covalently attached vs. adsorbed dye molecules.

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