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Core type as a factor of gap-enhanced Raman tags SERS response

Andrey M. Burov IBPPM RAS, Boris N. Khlebtsov IBPPM RAS, Nikolai G. Khlebtsov IBPPM RAS

Abstract

Among the many active SERS nanosystems, gap-enhanced Raman tags occupy a special niche. GERTs demonstrate high performance of the SERS enhanced factor, and therefore can be easily used in high-speed modes of bioimaging. In general, their structure is based on a noble metal nanocore surface coated with molecules of the Raman reporter and forming a gap between the core and the outer secondary shell. Total fundamental SERS enhancement factor of GERTs particles depends on a number of factors, including single or multilayer (nanomatryoshka) type of nanostructures, the type of nanocore, thickness of the gap, the type and structure of the outer layer and variety of Raman molecules used as reporters. In this regard, we synthesized GERTs based on nanospheres (AuNS), polygonal nanoparticles (AuNP), and gold nanorods, and studied the effect of the core shape on the SERS response.

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Burov Andrey M.
IBPPM RAS
Russia

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