Abstract

The self-assembly of monodisperse gold and silver colloid particles into monolayers on polymer-coated substrates yields macroscopic surfaces that are highly active for surface-enhanced Raman scattering (SERS). Particles are bound to the substrate through multiple bonds between the colloidal metal and functional groups on the polymer such as cyanide (CN), amine (NH 2 ), and thiol (SH). Surface evolution, which can be followed in real time by ultraviolet-visible spectroscopy and SERS, can be controlled to yield high reproducibility on both the nanometer and the centimeter scales. On conducting substrates, colloid monolayers are electrochemically addressable and behave like a collection of closely spaced microelectrodes. These favorable properties and the ease of monolayer construction suggest a widespread use for metal colloid-based substrates.

Keywords

MonolayerColloidDispersityMaterials scienceGold ColloidSubstrate (aquarium)PolymerNanotechnologyChemical engineeringMetalColloidal goldChemistryNanoparticlePolymer chemistryOrganic chemistry

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Publication Info

Year
1995
Type
article
Volume
267
Issue
5204
Pages
1629-1632
Citations
1274
Access
Closed

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Cite This

Ronit Freeman, Katherine C. Grabar, Keith J. Allison et al. (1995). Self-Assembled Metal Colloid Monolayers: An Approach to SERS Substrates. Science , 267 (5204) , 1629-1632. https://doi.org/10.1126/science.267.5204.1629

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DOI
10.1126/science.267.5204.1629