SERRS labelled beads for multiplex detection.
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.
McCabe
Ailie F
AF
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, UK.
Eliasson
Charlotte
C
Prasath
R Arun
RA
Hernandez-Santana
Aaron
A
Stevenson
Lorna
L
Apple
Ian
I
Cormack
Peter A G
PA
Graham
Duncan
D
Smith
William E
WE
Corish
Peter
P
Lipscomb
Sarah J
SJ
Holland
Edward R
ER
Prince
Paul D
PD
D053768:Metal Nanoparticles / Q000737:chemistry; D015345:Oligonucleotide Probes; D012834:Silver / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
D015345:Oligonucleotide Probes; D012834:Silver