Plasmon interactions between gold nanoparticles in aqueous solution with controlled spatial separation

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

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical Chemistry Chemical Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600/1606
Subjects:
ID Code:
133001
Deposited By:
Deposited On:
22 Apr 2019 11:10
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Sep 2020 08:49