Effect of substituents on surface equilibria of thiophenols and isoquinolines on gold substrates studied using surface-enhanced Raman spectroscopy

2020 ◽  
Vol 22 (28) ◽  
pp. 15953-15965
Author(s):  
Erik D. Emmons ◽  
Jason A. Guicheteau ◽  
Augustus W. Fountain ◽  
Ashish Tripathi
Keyword(s):  
Raman Spectroscopy ◽  
Binding Affinity ◽  
Dipole Moments ◽  
Surface Adsorption ◽  
Surface Enhanced Raman Spectroscopy ◽  
Effect Of Substituents ◽  
Adsorption Equilibria ◽  
Gold Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The effect of substituents on the surface adsorption equilibria on gold substrates was studied using surface-enhanced Raman spectroscopy in order to determine the effects of the localized dipole moments and charge donating/withdrawing properties on the binding affinity.

A Practical Method to Fabricate Gold Substrates for Surface-Enhanced Raman Spectroscopy

2008 ◽  
Vol 62 (9) ◽  
pp. 992-1000 ◽  
Author(s):  
Ratna Tantra ◽  
Richard J. C. Brown ◽  
Martin J. T. Milton ◽  
Dipak Gohil
Keyword(s):  
Raman Spectroscopy ◽  
Practical Method ◽  
Surface Enhanced Raman Spectroscopy ◽  
Gold Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

scholarly journals Surface-Enhanced Raman Spectroscopy on Hybrid Graphene/Gold Substrates near the Percolation Threshold

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 164 ◽  
Author(s):  
Dmitry E. Tatarkin ◽  
Dmitry I. Yakubovsky ◽  
Georgy A. Ermolaev ◽  
Yury V. Stebunov ◽  
Artem A. Voronov ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Percolation Threshold ◽  
Surface Enhanced Raman Spectroscopy ◽  
Effective Dielectric Constant ◽  
Gold Films ◽  
Maximum Enhancement ◽  
Sers Signal ◽  
Gold Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Graphene is a promising platform for surface-enhanced Raman spectroscopy (SERS)-active substrates, primarily due to the possibility of quenching photoluminescence and fluorescence. Here we study ultrathin gold films near the percolation threshold fabricated by electron-beam deposition on monolayer CVD graphene. The advantages of such hybrid graphene/gold substrates for surface-enhanced Raman spectroscopy are discussed in comparison with conventional substrates without the graphene layer. The percolation threshold is determined by independent measurements of the sheet resistance and effective dielectric constant by spectroscopic ellipsometry. The surface morphology of the ultrathin gold films is analyzed by the use of scanning electron microscopy (SEM) and atomic force microscopy (AFM), and the thicknesses of the films in addition to the quartz-crystal mass-thickness sensor are also measured by AFM. We experimentally demonstrate that the maximum SERS signal is observed near and slightly below the percolation threshold. In this case, the region of maximum enhancement of the SERS signal can be determined using the figure of merit (FOM), which is the ratio of the real and imaginary parts of the effective dielectric permittivity of the films. SERS measurements on hybrid graphene/gold substrates with the dye Crystal Violet show an enhancement factor of ~105 and also demonstrate the ability of graphene to quench photoluminescence by an average of ~60%.

Laser writing of single-crystalline gold substrates for surface enhanced Raman spectroscopy

2017 ◽  
Vol 4 (7) ◽  
pp. 075027 ◽  
Author(s):  
Astha Singh ◽  
Geeta Sharma ◽  
Neeraj Ranjan ◽  
Kshitij Mittholiya ◽  
Anuj Bhatnagar ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Laser Writing ◽  
Single Crystalline ◽  
Gold Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Advanced silver and gold substrates for surface-enhanced Raman spectroscopy of pesticides

2021 ◽  
pp. 1-11
Author(s):  
Petar Asenov Atanasov ◽  
Nikolay Nedyalkov Nedyalkov ◽  
Naoki Fukata ◽  
Wipakorn Jevasuwan
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Gold Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman
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