Sendroiu, I.E. and Mertens, S.F.L. and Schiffrin, D.J. (2006) Plasmon interactions between gold nanoparticles in aqueous solution with controlled spatial separation. Physical Chemistry Chemical Physics, 8 (12). pp. 1430-1436. ISSN 1463-9076
Full text not available from this repository.Abstract
The effects of interparticle distance on the UV-visible absorption spectrum of gold nanocrystals aggregates in aqueous solution have been investigated. The aggregates were produced by ion-templated chelation of ω- mercaptocarboxylic acid ligands covalently attached to the nanoparticles surface. Variation of the ligand chain length provides control over the interparticle separation in the aggregates. The UV-visible spectra consist typically of a single particle band and a secondary band at higher wavelengths associated with the formation of aggregates in solution. The position of the latter depends on interparticle separation up to distances of ∼8 nm, in accordance with existing models. Potential applications therefore include distance sensitive labels or proximity probes. Conversely, variation of the ligand length allows the preparation of nanostuctured materials with tuned optical properties. © the Owner Societies 2006.