What question did this study set out to answer?

To investigate the surface-enhanced Raman scattering behavior, adsorption modes, and orientation of o-mercaptobenzoic acid on colloidal silver nanoparticles across different pH levels and concentrations.

December 1, 1991Journal of Raman Spectroscopy

Surface‐enhanced Raman scattering of o‐mercaptobenzoic acid in silver sol

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Authors

SLSang Bok LeeUniversity of Maryland, College Park KKKwan KimKorea Maritime and Ocean University MKMyoung Soo KimYonsei University

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Implication

Spectroscopic analysis reveals pH-dependent binding of o-mercaptobenzoic acid on silver sol nanoparticles, indicating packing density governs surface orientation.

Key Points

To investigate the surface-enhanced Raman scattering behavior, adsorption modes, and orientation of o-mercaptobenzoic acid on colloidal silver nanoparticles across different pH levels and concentrations.
Measured surface-enhanced Raman scattering (SERS) spectra of o-mercaptobenzoic acid (OMBA) adsorbed on silver sol particles.
Adjusted solution conditions across basic, neutral, and strongly acidic environments (down to pH 1.2).
Varied bulk OMBA concentrations to evaluate the influence of molecular surface packing versus solution pH.
At neutral and basic pH, OMBA adsorbs dissociatively to the silver surface through both its sulfur and carboxylate groups as o-sulphidobenzoate.
At pH 1.2, protonation occurs at the carboxylate group while the thiolate remains deprotonated, restricting silver surface coordination solely to the sulfur atom.
Higher bulk concentrations favor dense surface packing, which dominates over pH in dictating the orientation of adsorbed OMBA.

Cite This Study

Lee et al. (1991) studied this question.

synapsesocial.com/papers/6a6f9b6ee5469ee92be0811f https://doi.org/10.1002/jrs.1250221214

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Implication

Spectroscopic analysis reveals pH-dependent binding of o-mercaptobenzoic acid on silver sol nanoparticles, indicating packing density governs surface orientation.

Surface‐enhanced Raman scattering of o‐mercaptobenzoic acid in silver sol

Discussion

Member takes

Implication

Key Points

Cite This Study

Surface‐enhanced Raman scattering of o‐mercaptobenzoic acid in silver sol

Discussion

Member takes

Implication

Key Points

Cite This Study

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