title: SERRS labelled beads for multiplex detection.
abstract: Beads labelled using surface enhanced resonance Raman scattering (SERRS) are highly sensitive and specific tags, with potential applications in biological assays, including molecular diagnostics. The beads consist of a nucleus containing dye labelled silver-nanoparticle aggregates surrounded by a polymer core. The nuclei generate strong SERRS signals. To illustrate the coding advantage created by the sharp, molecularly specific SERRS signals, four specially designed SERRS dyes have been used as labels and three of these have been combined in a multiplex analysis. These dyes use specific groups such as benzotriazole and 8-hydroxyquinoline to improve binding to the surface of the silver particles. The aggregation state of the particles is held constant by the polymer core, this nucleus also contains many dye labels, yielding a very high Raman scattering intensity for each bead. To functionalise these beads for use in biological assays an outer polymer shell can be added, which allows the attachment of oligonucleotide probes. Oligonucleotide modified beads can then be used for detection of specific oligonucleotide targets. The specificity of SERRS will allow for the detection of multiple targets within a single assay.
authors.affiliation: Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, UK.
authors.forename: Ailie F
authors.initials: AF
authors.lastname: McCabe
authors.forename: Charlotte
authors.initials: C
authors.lastname: Eliasson
authors.forename: R Arun
authors.initials: RA
authors.lastname: Prasath
authors.forename: Aaron
authors.initials: A
authors.lastname: Hernandez-Santana
authors.forename: Lorna
authors.initials: L
authors.lastname: Stevenson
authors.forename: Ian
authors.initials: I
authors.lastname: Apple
authors.forename: Peter A G
authors.initials: PA
authors.lastname: Cormack
authors.forename: Duncan
authors.initials: D
authors.lastname: Graham
authors.forename: William E
authors.initials: WE
authors.lastname: Smith
authors.forename: Peter
authors.initials: P
authors.lastname: Corish
authors.forename: Sarah J
authors.initials: SJ
authors.lastname: Lipscomb
authors.forename: Edward R
authors.initials: ER
authors.lastname: Holland
authors.forename: Paul D
authors.initials: PD
authors.lastname: Prince
mesh_terms: D053768:Metal Nanoparticles / Q000737:chemistry; D015345:Oligonucleotide Probes; D012834:Silver / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
chemical_list: D015345:Oligonucleotide Probes; D012834:Silver