An examination of the relationship between surface enhanced Raman scattering (SERS) intensities and surface concentration for pyridine adsorbed at the polycrystalline gold/aqueous solution interface

1991 ◽  
Vol 300 (1-2) ◽  
pp. 563-584 ◽  
Author(s):  
L. Stolberg ◽  
J. Lipkowski ◽  
D.E. Irish
Keyword(s):  
Aqueous Solution ◽  
Raman Scattering ◽  
Surface Concentration ◽  
Surface Enhanced Raman Scattering ◽  
Solution Interface ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polycrystalline Gold ◽  
Enhanced Raman Scattering ◽  
The Relationship

Measurement of the Surface-Enhanced Coherent Anti-Stokes Raman Scattering (SECARS) Due to the 1574 cm−1 Surface-Enhanced Raman Scattering (SERS) Mode of Benzenethiol Using Low-Power (<20 mW) CW Diode Lasers

2013 ◽  
Vol 67 (2) ◽  
pp. 132-135 ◽  
Author(s):  
Roshan L. Aggarwal ◽  
Lewis W. Farrar ◽  
Nathan G. Greeneltch ◽  
Richard P. Van Duyne ◽  
Dennis L. Polla
Keyword(s):  
Raman Scattering ◽  
Laser Power ◽  
Surface Concentration ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Nonlinear Optical Susceptibility ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Anti Stokes

The surface-enhanced coherent anti-Stokes Raman scattering (SECARS) from a self-assembled monolayer (SAM) of benzenethiol on a silver-coated surface-enhanced Raman scattering (SERS) substrate has been measured for the 1574 cm−1 SERS mode. A value of 9.6 ± 1.7 × 10−14 W was determined for the resonant component of the SECARS signal using 17.8 mW of 784.9 nm pump laser power and 7.1 mW of 895.5 nm Stokes laser power; the pump and Stokes lasers were polarized parallel to each other but perpendicular to the grooves of the diffraction grating in the spectrometer. The measured value of resonant component of the SECARS signal is in agreement with the calculated value of 9.3 × 10−14 W using the measured value of 8.7 ± 0.5 cm−1 for the SERS linewidth Γ (full width at half-maximum) and the value of 5.7 ± 1.4 × 10−7 for the product of the Raman cross section σSERS and the surface concentration Ns of the benzenethiol SAM. The xxxx component of the resonant part of the third-order nonlinear optical susceptibility |3χ(3) R xxxx| for the 1574 cm−1 SERS mode has been determined to be 4.3 ± 1.1 × 10−5 cmg−1·s2. The SERS enhancement factor for the 1574 cm−1 mode was determined to be 3.6 ± 0. 9 × 107 using the value of 1.8 × 1015 molecules/cm2 for Ns.

scholarly journals Improved Surface-Enhanced-Raman Scattering Sensitivity Using Si Nanowires/Silver Nanostructures by a Single Step Metal-Assisted Chemical Etching

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1760
Author(s):  
Ioannis Kochylas ◽  
Spiros Gardelis ◽  
Vlassis Likodimos ◽  
Konstantinos Giannakopoulos ◽  
Polycarpos Falaras ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Raman Scattering ◽  
Chemical Etching ◽  
Surface Enhanced Raman Scattering ◽  
Single Step ◽  
Silver Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Metal Assisted Chemical Etching

In this study, we developed highly sensitive substrates for Surface-Enhanced-Raman-Scattering (SERS) spectroscopy, consisting of silicon nanowires (SiNWs) decorated by silver nanostructures using single-step Metal Assisted Chemical Etching (MACE). One-step MACE was performed on p-type Si substrates by immersion in AgNO3/HF aqueous solutions resulting in the formation of SiNWs decorated by either silver aggregates or dendrites. Specifically, dendrites were formed during SiNWs’ growth in the etchant solution, whereas aggregates were grown after the removal of the dendrites from the SiNWs in HNO3 aqueous solution and subsequent re-immersion of the specimens in a AgNO3/HF aqueous solution by adjusting the growth time to achieve the desired density of silver nanostructures. The dendrites had much larger height than the aggregates. R6G was used as analyte to test the SERS activity of the substrates prepared by the two fabrication processes. The silver aggregates showed a considerably lower limit of detection (LOD) for SERS down to a R6G concentration of 10−13 M, and much better uniformity in terms of detection in comparison with the silver dendritic structures. Enhancement factors in the range 105–1010 were calculated, demonstrating very high SERS sensitivities for analytic applications.

SERS-active Au NR oligomer sensor for ultrasensitive detection of mercury ions

RSC Advances ◽  
2015 ◽  
Vol 5 (100) ◽  
pp. 81802-81807 ◽  
Author(s):  
Xiaoling Wu ◽  
Lijuan Tang ◽  
Wei Ma ◽  
Liguang Xu ◽  
Liqiang Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Ultrasensitive Detection ◽  
Mercury Ions ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Self Assembled

In this study, we developed a sensitive surface-enhanced Raman scattering (SERS) sensor based on a self-assembled Au NR oligomer for the detection of mercury ions (Hg2+) in aqueous solution.

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