scholarly journals Linear chains of Ag nanoparticles embedded in dielectric films for SERS applications in analytical chemistry

2021 ◽  
Author(s):  
Sophie Camelio ◽  
David Babonneau ◽  
Elliot Vandenhecke ◽  
Guy Louarn ◽  
Bernard Humbert
Keyword(s):  
Analytical Chemistry ◽  
Ag Nanoparticles ◽  
Metallic Nanoparticles ◽  
Dielectric Films ◽  
Sers Substrate ◽  
Raman Amplification ◽  
Dielectric Surfaces ◽  
Linear Chains ◽  
Dielectric Shell

In line with the SHINERS approach, in which Raman amplification is provided by metallic nanoparticles with an ultrathin dielectric shell, we report on a SERS substrate consisting of lines of Ag nanoparticles embedded in dielectric surfaces.

scholarly journals Development of Effectual Substrates for SERS by Nanostructures-on flexible surfaces

2021 ◽  
Vol 2114 (1) ◽  
pp. 012084
Author(s):  
Hammad R. Humud ◽  
Fatimah Jumaah Moaen
Keyword(s):  
Raman Scattering ◽  
Ag Nanoparticles ◽  
Surface Enhanced Raman Scattering ◽  
Wave Number ◽  
Plasmonic Nanostructures ◽  
Sers Substrate ◽  
Two Dimensional ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Abstract The current study examines recent advancements in surface-enhanced Raman scattering (SERS), a technique that employs flexible surfaces as an active substrate, this surfaces consist from two-dimensional thermo-plasmonic grating. With 53 nm Au layer (was deposited on the 2D grating structure of the PDMS by the PVD method). The explosive wire technique was used to preparing Ag nanoparticles that were used for the purpose of SERS. The effect of the plasmonic nanostructures on the absorption spectra and Surface - Enhanced Raman Scattering (SERS) activities was examined. Rhodamine 6G dye was used as a probe molecule. X-Ray diffraction (XRD) was used to examine the structural characteristics of the nanoparticles. The morphology was assessed using Field Emission Scanning Electron Microscopy(FESEM). A twin beam UV-Vis Spectrophotometer was used to measure the absorption of the combined Rh6G dye (concentration 1×10“–6M) with the nanostructures. a Sunshine Raman microscope system and a 50mm objective lens, used for investigating the Raman spectra of the Rh6G combined with nanostructures. The results showed that the enhancement factor (EF) for SERS of R6G (1×M) reached to (2.2×10 3) When using Ag nanoparticles and (0.08 × 103) when R6G deposited directly on the flexible substrates without nanostructures at the wave number (1650 cm−1), we produced a recyclable, homogeneous, and highly sensitive SERS substrate with dependable reproducibility. For the SERS substrate, a surface made up of two-dimensional (2D) flexible grating substrates was chosen to provide multiple modalities in electrical and medicinal applications.

scholarly journals Organic Molecule Detection Based on SERS in Microfluidics

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Xin Zhang ◽  
Haiyan Zhang ◽  
Sheng Yan ◽  
Zugang Zeng ◽  
Anshou Huang ◽  
...  
Keyword(s):  
Environmental Monitoring ◽  
Ag Nanoparticles ◽  
Organic Molecule ◽  
Organic Molecules ◽  
Chemical Reduction ◽  
Fdtd Method ◽  
Great Influence ◽  
High Sensitivity ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate

AbstractSensitive in situ detection of organic molecules is highly demanded in environmental monitoring. In this work, the surface enhanced Raman spectroscopy (SERS) is adopted in microfluidics to detect the organic molecules with high accuracy and high sensitivity. Here the SERS substrate in microchannel consists of Ag nanoparticles synthesized by chemical reduction. The data indicates the fabrication conditions have great influence on the sizes and distributions of Ag nanoparticles, which play an important role on the SERS enhancement. This result is further confirmed by the simulation of electromagnetic field distributions based on finite difference time domain (FDTD) method. Furthermore, the SERS spectra of organic molecule (methylene blue) obtained in this plasmonic microfluidic system exhibit good reproducibility with high sensitivity. By a combination of SERS and microfluidics, our work not only explores the research field of plasmonics but also has broad application prospects in environmental monitoring.

SILAR grown Ag nanoparticles as an efficient large area SERS substrate

2018 ◽  
Vol 49 (8) ◽  
pp. 1274-1287 ◽  
Author(s):  
Imran M. Shaikh ◽  
Shrikrishna D. Sartale
Keyword(s):  
Ag Nanoparticles ◽  
Sers Substrate ◽  
Large Area

Reusable and long-life 3D Ag nanoparticles coated Si nanowire array as sensitive SERS substrate

2019 ◽  
Vol 494 ◽  
pp. 583-590 ◽  
Author(s):  
Jian Wu ◽  
Yongjun Du ◽  
Chunyan Wang ◽  
Shi Bai ◽  
Tian Zhang ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Nanowire Array ◽  
Sers Substrate ◽  
Si Nanowire ◽  
Si Nanowire Array ◽  
Long Life

Improved Label-Free Identification of Individual Exosome-like Vesicles with Au@Ag Nanoparticles as SERS Substrate

2019 ◽  
Vol 11 (43) ◽  
pp. 39424-39435 ◽  
Author(s):  
Juan C. Fraire ◽  
Stephan Stremersch ◽  
Davinia Bouckaert ◽  
Tinne Monteyne ◽  
Thomas De Beer ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Sers Substrate ◽  
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