Polyethylenimine-Capped Ag Nanoparticle Film as a Platform for Detecting Charged Dye Molecules by Surface-Enhanced Raman Scattering and Metal-Enhanced Fluorescence

2012 ◽  
Vol 4 (10) ◽  
pp. 5498-5504 ◽  
Author(s):  
Kwan Kim ◽  
Ji Won Lee ◽  
Kuan Soo Shin
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Dye Molecules ◽  
Ag Nanoparticle ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Nanoparticle Film

Nanoparticle Tracers in Reservoir-On-A-chip by Surface-Enhanced Raman Scattering - Fluorescence SERS-SEF Imaging Technology

2021 ◽  
Author(s):  
Sehoon Chang ◽  
Shannon L. Eichmann ◽  
Wei Wang
Keyword(s):  
Porous Media ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Composite Nanoparticles ◽  
Dye Molecules ◽  
Enhanced Fluorescence ◽  
Surface Enhanced Fluorescence ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Abstract Nanoparticles or nanocomposite fluids are injected into oil reservoirs for reservoir tracing or to improve injectivity or recovery of oil. Effective application of nanoparticles in fluid flooding still needs to be investigated. Dual-mode surface-enhanced Raman scattering (SERS) - surface-enhanced fluorescence (SEF) composite nanoparticles have been developed as nanoparticle reservoir tracers. This presentation discusses their transport and detectability in porous media, providing valuable information for understanding the role of nanoparticles in EOR process. The dual-mode surface-enhanced Raman scattering (SERS) - surface-enhanced fluorescence (SEF) composite nanoparticles are synthesized composed of Ag or Au metal cores, specific dye molecules, and a SiO2 shell materials. To optimize maximum signal enhancement of both phenomena such as SERS and SEF, the distance between core metal nanoparticles and dye molecules are precisely controlled. The synthesized composite nanoparticles barcoded with dye molecules are detectable by both fluorescence and Raman spectroscopies due to the SERS-SEF phenomena. Both fluorescence and Raman microscopic images of dye embedded surfaceenhanced Raman scattering (SERS) surface-enhanced fluorescence (SEF) composite nanoparticles in water phase successfully were collected within microfluidic reservoir-on-a-chip. The reservoir-on-a-chip utilized in this study fabricated based on reservoir rock geometry and coated with calcium carbonate. The synthesized SERS-SEF composite nanoparticles in water solution have been flooded into the microfluidic reservoir-on-a-chip and imaged for probing interfacial behavior of fluids such as liquid-liquid interfaces and studying the behavior of nanoparticles at liquid-rock interfaces. The precise synthesis method to produce the composite nanoparticles has been developed for the embedded dye molecules to generate noticeably enhanced detectability due to the strong SERS phenomenon. In conclusion, SERS-SEF nanoparticles barcoded with the fingerprinted Raman and fluorescence signals can provide a possible pathway toward SERS-SEF nanoprobe as various barcoded tracers to understand fluid behavior in porous media. Composite nanoparticle synthesis and its detection in flow technologies have been developed for visualization of the fluid flow behavior in porous media representing reservoir rock geometry. The results of the high-resolution nanoparticle fluid imaging data in reservoir-on-a-chip can be applied to understand mechanism of nanoparticle fluid assisted chemical enhanced oil recovery.

scholarly journals Fabrication of transparent composites for non-invasive Surface Enhanced Raman Scattering (SERS) analysis of modern art works

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Abeer Alyami ◽  
Antonio Mirabile ◽  
Daniela Iacopino
Keyword(s):  
Raman Scattering ◽  
Self Assembly ◽  
Surface Enhanced Raman Scattering ◽  
Ag Nanoparticle ◽  
Non Invasive ◽  
Enhanced Sensitivity ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Invaluable Tool ◽  
Enhanced Raman Scattering

Abstract Surface Enhanced Raman Scattering (SERS) has become an invaluable tool for the identification of colorants in artworks, due to its enhanced sensitivity and ability to quench fluorescence interference compared to Raman spectroscopy. However, the application of SERS to artwork analysis is still limited by its inherent invasiveness and the need for extraction procedures. In this work non-invasive transparent SERS probes were fabricated by self-assembly of Ag nanoparticles into glass and PDMS surfaces and used for identification of dye content in artistic drawings. SERS measurements were performed directly on the selected analytical surfaces by laser back illumination through the SERS probe. The non-invasiveness of fabricated probes was tested by optical microscopy. It was found that Ag nanoparticle/glass probes left no Ag nanoparticle residue after four consecutive depositions on sacrificial surfaces, whereas Ag nanoparticle/PDMS composites could be deposited and subsequently peeled off the analytical surfaces leaving no contamination traces. The high conformability, flexibility and transparency of Ag nanoparticle/PDMS composites enabled good adhesion to the surface of analyzed artistic drawings and therefore the generation of in situ SERS spectra from artistic drawings. The use of this method allowed identification of main dye components in real artworks comprising a red BIC ballpoint drawing and a Japanese woodblock print.

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.

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