Preparation and characterization of Ag colloid monolayers

Robin M. Bright; Michael D. Musick; Michael J. Natan

doi:10.1021/la980138j

Preparation and characterization of Ag colloid monolayers

Robin M. Bright, Michael D. Musick, Michael J. Natan

Pennsylvania State University

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

161 Scopus citations

Abstract

The Process of Ag colloid self-assembly onto organosilane-functionalized glass, carbon, and Au surfaces has been studied using UV-visible spectrophotometry, quartz crystal microgravimetry, and atomic force microscopy. Ag colloids prepared by citrate reduction and by ethylenediaminetetraacetic acid reduction of Ag⁺ yield different deposition kinetics, primarily a result of differences in particle concentration and monodispersity. The sticking probabilitics and equilibrium constants for each type of colloid were measured. Surface-enhanced Raman scattering (SERS) and electrochemical properties of Ag colloid monolayers were compared to buld Ag. Deposition of Ag colloid onto carvon electrodes improves the heterogeneous rate constant for electron transfer to [Ru(NH₃)₆]³⁺, but the modified electrodes still fall short of values obtained for bulk Ag. Likewise, Ag colloid monolayers are less SERS-active than roughened bulk Ag. The effects of particles polydispersity on these phenomena are discussed.

Original language	English
Pages (from-to)	5695-5700
Number of pages	6
Journal	Langmuir
Volume	14
Issue number	20
DOIs	https://doi.org/10.1021/la980138j
State	Published - 29 Sep 1998
Externally published	Yes

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abstract = "The Process of Ag colloid self-assembly onto organosilane-functionalized glass, carbon, and Au surfaces has been studied using UV-visible spectrophotometry, quartz crystal microgravimetry, and atomic force microscopy. Ag colloids prepared by citrate reduction and by ethylenediaminetetraacetic acid reduction of Ag+ yield different deposition kinetics, primarily a result of differences in particle concentration and monodispersity. The sticking probabilitics and equilibrium constants for each type of colloid were measured. Surface-enhanced Raman scattering (SERS) and electrochemical properties of Ag colloid monolayers were compared to buld Ag. Deposition of Ag colloid onto carvon electrodes improves the heterogeneous rate constant for electron transfer to [Ru(NH3)6]3+, but the modified electrodes still fall short of values obtained for bulk Ag. Likewise, Ag colloid monolayers are less SERS-active than roughened bulk Ag. The effects of particles polydispersity on these phenomena are discussed.",

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AU - Bright, Robin M.

AU - Musick, Michael D.

AU - Natan, Michael J.

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N2 - The Process of Ag colloid self-assembly onto organosilane-functionalized glass, carbon, and Au surfaces has been studied using UV-visible spectrophotometry, quartz crystal microgravimetry, and atomic force microscopy. Ag colloids prepared by citrate reduction and by ethylenediaminetetraacetic acid reduction of Ag+ yield different deposition kinetics, primarily a result of differences in particle concentration and monodispersity. The sticking probabilitics and equilibrium constants for each type of colloid were measured. Surface-enhanced Raman scattering (SERS) and electrochemical properties of Ag colloid monolayers were compared to buld Ag. Deposition of Ag colloid onto carvon electrodes improves the heterogeneous rate constant for electron transfer to [Ru(NH3)6]3+, but the modified electrodes still fall short of values obtained for bulk Ag. Likewise, Ag colloid monolayers are less SERS-active than roughened bulk Ag. The effects of particles polydispersity on these phenomena are discussed.

AB - The Process of Ag colloid self-assembly onto organosilane-functionalized glass, carbon, and Au surfaces has been studied using UV-visible spectrophotometry, quartz crystal microgravimetry, and atomic force microscopy. Ag colloids prepared by citrate reduction and by ethylenediaminetetraacetic acid reduction of Ag+ yield different deposition kinetics, primarily a result of differences in particle concentration and monodispersity. The sticking probabilitics and equilibrium constants for each type of colloid were measured. Surface-enhanced Raman scattering (SERS) and electrochemical properties of Ag colloid monolayers were compared to buld Ag. Deposition of Ag colloid onto carvon electrodes improves the heterogeneous rate constant for electron transfer to [Ru(NH3)6]3+, but the modified electrodes still fall short of values obtained for bulk Ag. Likewise, Ag colloid monolayers are less SERS-active than roughened bulk Ag. The effects of particles polydispersity on these phenomena are discussed.

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Preparation and characterization of Ag colloid monolayers

Abstract

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