Recent developments on gold nanostructures for surface enhanced Raman spectroscopy: particle shape, substrates and analytical applications. A review

AbstractWe report high optical enhancement in Ag/Au alloys and porous gold nanostructures using Surface Enhanced Raman Spectroscopy (SERS) technique. Scanning electron microscopy investigation shows the formation of Ag/Au alloys particles during irradiation of Ag–Au bilayer deposited on FTO (SnO2:F) substrate by laser fluency equal to 0.5 J/cm2 or 1.0 J/cm2 with 12 ns laser pulse duration. The dealloying process of these Au–Ag alloy particles leads to the formation of Au nanoporous particles. The obtained nanostructures were studied with SERS and revealed a promising enhancement factor in porous Au nanostructure and tunability of localized surface plasmon resonance. The highly dense strong hot spots and large specific area in porous structure of gold nanostructures is the origin of the highly enhancement factor observed experimentally and theoretically. A very good agreement between simulation and experimental results was found confirming the potential of Au/Ag alloys and particularly porous gold nanostructure in SERS application.

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Large-scale self-organized gold nanostructures with bidirectional plasmon resonances for SERS

RSC Advances ◽

10.1039/c8ra04031a ◽

2018 ◽

Vol 8 (40) ◽

pp. 22569-22576 ◽

Cited By ~ 10

Author(s):

Benjamin Schreiber ◽

Dimitra Gkogkou ◽

Lina Dedelaite ◽

Jochen Kerbusch ◽

René Hübner ◽

...

Keyword(s):

Raman Spectroscopy ◽

Large Scale ◽

Surface Enhanced Raman Spectroscopy ◽

Gold Nanostructures ◽

Self Organized ◽

Surface Enhanced ◽

Plasmon Resonances ◽

Surface Enhanced Raman

Here we present a two-step fabrication of large-scale self-organized gold nanostructures for multicolor surface-enhanced Raman spectroscopy (SERS). We studied the morphology and plasmonic responses of our substrates and performed optical simulations.

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A Review on Applications of Two-Dimensional Materials in Surface-Enhanced Raman Spectroscopy

International Journal of Spectroscopy ◽

10.1155/2018/4861472 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9 ◽

Cited By ~ 13

Author(s):

Ming Xia

Keyword(s):

Raman Spectroscopy ◽

2D Materials ◽

Surface Enhanced Raman Spectroscopy ◽

Great Promise ◽

Two Dimensional ◽

Raman Enhancement ◽

Two Dimensional Materials ◽

Surface Enhanced ◽

Surface Enhanced Raman ◽

Recent Developments

Two-dimensional (2D) materials, such as graphene and MoS2, have been attracting wide interest in surface enhancement Raman spectroscopy. This perspective gives an overview of recent developments in 2D materials’ application in surface-enhanced Raman spectroscopy. This review paper focuses on the applications of using bare 2D materials and metal/2D material hybrid substrate for Raman enhancement. The Raman enhancing mechanism of 2D materials will also be discussed. The progress covered herein shows great promise for widespread adoption of 2D materials in SERS application.

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