Nitrogen-Doped Silver-Nanoparticle-Decorated Transition-Metal Dichalcogenides as Surface-Enhanced Raman Scattering Substrates for Sensing Polycyclic Aromatic Hydrocarbons

2018 ◽  
Vol 1 (7) ◽  
pp. 3625-3635 ◽  
Author(s):  
Malamatenia A. Koklioti ◽  
Carla Bittencourt ◽  
Xavier Noirfalise ◽  
Izcoatl Saucedo-Orozco ◽  
Mildred Quintana ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Silver Nanoparticle ◽  
Aromatic Hydrocarbons ◽  
Transition Metal Dichalcogenides ◽  
Nitrogen Doped ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polycyclic Aromatic ◽  
Metal Dichalcogenides ◽  
Enhanced Raman Scattering

CTAB micelles assisted rGO–AgNP hybrids for SERS detection of polycyclic aromatic hydrocarbons

2015 ◽  
Vol 17 (33) ◽  
pp. 21158-21163 ◽  
Author(s):  
Meng Jiang ◽  
Zhijiang Qian ◽  
Xufeng Zhou ◽  
Xing Xin ◽  
Jinghua Wu ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Raman Scattering ◽  
Aromatic Hydrocarbons ◽  
Surface Enhanced Raman Scattering ◽  
Ag Nanoparticle ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Polycyclic Aromatic ◽  
Enhanced Raman Scattering

A facile and convenient strategy to detect polycyclic aromatic hydrocarbons is presented, using graphene–Ag nanoparticle hybrids as a surface-enhanced Raman scattering substrate.

scholarly journals Detection of polycyclic aromatic hydrocarbons by surface enhanced Raman scattering on colloidal silver substrates

2020 ◽  
Vol 98 (2) ◽  
pp. 24-31
Author(s):  
R.Kh. Dzhanabekova ◽  
◽  
M.S. Kim ◽  
N.Kh. Ibrayev ◽  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Raman Scattering ◽  
Aromatic Hydrocarbons ◽  
Cetyltrimethylammonium Bromide ◽  
Surface Enhanced Raman Scattering ◽  
Colloidal Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polycyclic Aromatic ◽  
Enhanced Raman Scattering

The present work reports on the possibility of polycyclic aromatic hydrocarbons (PAHs) detection by surface enhanced Raman scattering (SERS) on substrates coated with colloidal silver stabilized with cetyltrimethylammonium bromide (CTAB). It was shown that cetyltrimethylammonium bromide acts not only as a stabilizer of metal nanoparticles, but also as modifying agent that promotes the concentration of hydrophobic PAH molecules near the amplified electromagnetic field of plasmon silver nanoparticles. Anthracene and pyrene were used as model analytes. To determine the sensitivity of the prepared SERS active coating, ethanol solutions of the analyzed substances with concentrations in the range of 2·10-4 — 10-6 mol/L were used. The lowest concentrations of solutions for which anthracene and pyrene are found on the tested substrates were equal to 2.5·10-6 M and 5·10-5 M, respectively. These results indicate that substrates are more sensitive to anthracene than to pyrene. The work also shows that various PAH molecules can be detected by characteristic peaks in a complex mixture without preliminary separation of the components.

Portable Surface-Enhanced Raman Scattering Sensor for the Rapid Detection of Polycyclic Aromatic Hydrocarbons in Coastal Seawater

2019 ◽  
Vol 53 (2) ◽  
pp. 46-55
Author(s):  
Xiaofeng Shi ◽  
Dahai Zhang ◽  
Wenjie Jia ◽  
Xia Yan ◽  
Jie Yang ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Raman Scattering ◽  
Aromatic Hydrocarbons ◽  
Colloid Solution ◽  
Gold Colloid ◽  
Coastal Seawater ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Polycyclic Aromatic ◽  
Enhanced Raman Scattering

AbstractTo rapidly detect polycyclic aromatic hydrocarbons (PAHs) in coastal seawater, a portable surface-enhanced Raman scattering (SERS) sensor was designed and assembled. A large number of halide ions are present in seawater, and they easily combine with gold nanoparticles, which results in a significant SERS enhancement effect for PAHs. Therefore, a mixture of a gold colloid solution and NaCl solution that forms a large number of highly sensitive SERS-active clusters was used in this study. The extinction intensity of the gold colloid solution at 785 nm—that is, the SERS excitation wavelength—was greatly increased by the addition of Cl−. The SERS sensor was applied in five different coastal environments, and six or seven types of PAHs were detected without further sample processing. The seawater samples were also analyzed using a gas chromatography-flame ionization detector (GC-FID) for comparison and confirmation of the results. Ten to 13 types of PAHs were detected by GC-FID after dehydration, purification, and concentration under nitrogen, and naphthalene was not detected because of its volatility. The SERS sensor was proven to be a suitable alarm sensor for the in-situ detection of PAHs in coastal seawater and is proposed for use as a real-time qualitative and quantitative PAH monitoring sensor in the near future based on its promising improvement in sensitivity.

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