scholarly journals Microfluidic setup for on-line SERS monitoring using laser induced nanoparticle spots as SERS active substrate

2017 ◽  
Vol 8 ◽  
pp. 237-243 ◽  
Author(s):  
Oana-M Buja ◽  
Ovidiu D Gordan ◽  
Nicolae Leopold ◽  
Andreas Morschhauser ◽  
Jörg Nestler ◽  
...  
Keyword(s):  
Sodium Citrate ◽  
Sers Substrate ◽  
Gold Chloride ◽  
Glass Capillary ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
On Line ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate

A microfluidic setup which enables on-line monitoring of residues of malachite green (MG) using surface-enhanced Raman scattering (SERS) is reported. The SERS active substrate was prepared via laser induced synthesis of silver or gold nanoparticles spot on the bottom of a 200 μm inner dimension glass capillary, by focusing the laser beam during a continuous flow of a mixture of silver nitrate or gold chloride and sodium citrate. The described microfluidic setup enables within a few minutes the monitoring of several processes: the synthesis of the SERS active spot, MG adsorption to the metal surface, detection of the analyte when saturation of the SERS signal is reached, and finally, the desorption of MG from the spot. Moreover, after MG complete desorption, the regeneration of the SERS active spot was achieved. The detection of MG was possible down to 10−7 M concentration with a good reproducibility when using silver or gold spots as SERS substrate.

Ag dendritic nanostructures for rapid detection of thiram based on surface-enhanced Raman scattering

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70553-70557 ◽  
Author(s):  
Qiang Wang ◽  
Dun Wu ◽  
Zhidong Chen
Keyword(s):  
Rapid Detection ◽  
Agricultural Products ◽  
Raman Signal ◽  
Surface Enhanced ◽  
Dendritic Nanostructures ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate ◽  
Signal Readout

We have developed a SERS-active substrate based on Ag dendritic nanostructures for sensitive Raman signal readout and fingerprint identification of pesticide residues in agricultural products and environments.

scholarly journals Template Stripping Method-Based Au Nanoarray for Surface-Enhanced Raman Scattering Detection of Antiepileptic Drug

Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 936
Author(s):  
Tatsuro Endo ◽  
Hirotaka Yamada ◽  
Kenji Yamada
Keyword(s):  
Raman Scattering ◽  
Antiepileptic Drug ◽  
High Reproducibility ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Stripping Method ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate

Surface-enhanced Raman scattering (SERS) is a potential candidate for highly sensitive detection of target molecules. A SERS active substrate with a noble metal nanostructure is required for this. However, a SERS active substrate requires complicated fabrication procedures. This in turn makes it difficult to fabricate highly sensitive SERS active substrates with high reproducibility. To overcome this difficulty, a plasmonic crystal (PC) with periodic noble metal nanostructures was fabricated via the template-stripping method using a polymer-based template. Using SERS active substrates, SERS was successfully achieved using the PC by detecting low concentrations of phenobarbital which is an antiepileptic drug using a commercially available portable Raman module. The PC can be fabricated by demolding the deposited gold layer from a polymer-based template. This method is rapid, economic, and has high reproducibility. SERS can be achieved easily using this PC for a wide variety of applications such as medical, pharmaceutical, and environmental protection.

scholarly journals Tunable Silver Nanoparticle Arrays by Hot Embossing and Sputter Deposition for Surface-Enhanced Raman Scattering

2019 ◽  
Vol 9 (8) ◽  
pp. 1636 ◽  
Author(s):  
Chu-Yu Huang ◽  
Ming-Shiuan Tsai
Keyword(s):  
Raman Scattering ◽  
Silver Nanoparticle ◽  
Enhancement Factor ◽  
Low Cost ◽  
Nanoparticle Arrays ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate

Surface-enhanced Raman scattering (SERS) spectroscopy has attracted a lot of attention over the past 30 years. Due to its extreme sensitivity and label-free detection capability, it has shown great potential in areas such as analytical chemistry, biochemistry, and environmental science. However, the major challenge is to manufacture large-scale highly SERS active substrates with high controllability, good reproducibility, and low cost. In this study, we report a novel method to fabricate uniform silver nanoparticle arrays with tunable particle sizes and interparticle gaps. Using hot embossing and sputtering techniques, we were able to batch produce the silver nanoparticle arrays SERS active substrate with consistent quality and low cost. We showed that the proposed SERS active substrate has good uniformity and high reproducibility. Experimental results show that the SERS enhancement factor is affected by silver nanoparticles size and interparticle gaps. Furthermore, the enhancement factor of the SERS signal obtained from Rhodamine 6G (R6G) probe molecules was as high as 1.12 × 107. Therefore, the developed method is very promising for use in many SERS applications.

Anisotropic gold nanoassembly: a study on polarization-dependent and polarization-selective surface-enhanced Raman scattering

2015 ◽  
Vol 17 (6) ◽  
pp. 4268-4276 ◽  
Author(s):  
Mohammad Kamal Hossain ◽  
Genin Gary Huang ◽  
Yoshita Tanaka ◽  
Tadaaki Kaneko ◽  
Yukihiro Ozaki
Keyword(s):  
Gold Nanoparticles ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Active Substrate ◽  
Enhanced Raman Scattering ◽  
Sers Active Substrate

Anisotropic nanoassembly of gold nanoparticles as SERS-active substrate self-depicting a tiny gaps at interstitials responsible for giant SERS enhancement.

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