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New limits in ultrasensitive trace detection by surface enhanced Raman scattering (SERS)

โœ Scribed by P Etchegoin; R.C Maher; L.F Cohen; H Hartigan; R.J.C Brown; M.J.T Milton; J.C Gallop

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
342 KB
Volume
375
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

We show the possibility of chemical tracing in solution down to a concentration of a fraction of an atto mol (10 ร€18 ) by means of non-resonant surface enhanced Raman scattering (SERS). The experiments are demonstrated with rhodamine 6G dissolved in water. Based on our results here, we propose a technique for counting a small number of SERS active molecules in micro-droplets of liquid. It is argued that, by choosing the appropriate SERS enhancement condition, the technique could be used and implemented as a routine analytical method with unprecedented detection capabilities for the monitoring and tracing of important families of biomolecules.

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