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

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.

Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 936
Author(s):  
Tatsuro Endo ◽  
Hirotaka Yamada ◽  
Kenji Yamada

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.


2015 ◽  
Vol 17 (6) ◽  
pp. 4268-4276 ◽  
Author(s):  
Mohammad Kamal Hossain ◽  
Genin Gary Huang ◽  
Yoshita Tanaka ◽  
Tadaaki Kaneko ◽  
Yukihiro Ozaki

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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