scholarly journals Facile fabrication of silver nanoparticle-coated silica-C18 core–shell microspheres and their applications in SERS detection

RSC Advances ◽  
2017 ◽  
Vol 7 (31) ◽  
pp. 19262-19266 ◽  
Author(s):  
Lin Xue ◽  
Hai-Xin Gu ◽  
Shou-Qi Yuan ◽  
Da-Wei Li
Keyword(s):  
Silver Nanoparticle ◽  
Sers Substrate ◽  
Step Method ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
One Step ◽  
Facile Fabrication ◽  
Functional Microspheres ◽  
Enhanced Raman Scattering

We present a one-step method to prepare silver nanoparticle (Ag NP) shell coated functional microspheres as a surface-enhanced Raman scattering (SERS) substrate.

An in situ approach for facile fabrication of robust and scalable SERS substrates

Nanoscale ◽  
2014 ◽  
Vol 6 (13) ◽  
pp. 7232-7236 ◽  
Author(s):  
Yi-Chung Wang ◽  
Joseph S. DuChene ◽  
Fengwei Huo ◽  
Wei David Wei
Keyword(s):  
High Sensitivity ◽  
Sers Substrate ◽  
Biological Detection ◽  
Sers Substrates ◽  
Widespread Implementation ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Facile Fabrication ◽  
Enhanced Raman Scattering

The widespread implementation of surface enhanced Raman scattering (SERS) techniques for chemical and biological detection requires an inexpensive, yet robust SERS substrate with high sensitivity and reproducibility.

β-Cyclodextrin coated SiO2@Au@Ag core–shell nanoparticles for SERS detection of PCBs

2015 ◽  
Vol 17 (33) ◽  
pp. 21149-21157 ◽  
Author(s):  
Yilin Lu ◽  
Guohua Yao ◽  
Kexi Sun ◽  
Qing Huang
Keyword(s):  
Ag Nanoparticles ◽  
Core Shell ◽  
Sers Substrate ◽  
Shell Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
New Type ◽  
Enhanced Raman Scattering ◽  
Core Shell Nanoparticles

A new type of surface-enhanced Raman scattering (SERS) substrate consisting of β-cyclodextrin (β-CD) coated SiO2@Au@Ag nanoparticles (SiO2@Au@Ag@CD NPs) has been achieved.

Tunable nanopillar array on a quartz-fiber tip for surface enhanced Raman scattering (SERS) detection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Evgeny Melekhov ◽  
Tatjana Penn ◽  
Tobias Weidauer ◽  
Valerius Abb ◽  
Martin Kammler ◽  
...  
Keyword(s):  
Diclofenac Sodium ◽  
Three Dimensional ◽  
Label Free ◽  
Step Method ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering ◽  
Optical Quartz Glass

Abstract In this work, a simple two-step method to create tunable self-assembled three-dimensional nanostructure array-like nanoantennas directly on the tip of an optical quartz glass fiber is described. The structures are prepared by using dry etching of the fiber tip. For the etching process, gold nanoparticles fabricated by thermal dewetting technique were used as template. The structures are applied as sensors for label-free analysis of organic substances in ppb range, such as drug residues in liquid solutions. The measurements are carried out by a portable Raman device with an exchangeable sensor head utilizing the SERS-effect. This method allows in situ applications. In order to characterize the SERS cells, para-thiocresol and diclofenac sodium are used as model substances. For optimization of the substrate performance, different thicknesses of the dewetting-layer (6, 9, 12 nm), different etching times for formation of the pillars (6, 8, 10 and 12 min), and different thicknesses of SERS-metallization (25, 50, 75 nm) of gold and silver are compared. In order to show the applicability of the structure on the tip of a fiber, measurements from the upper side and from the underside of the substrate on quartz plates are compared. Reproducible SERS enhancement factors up to 10 7 {10^{7}} were achieved.

A sensitive SERS assay for detecting proteins and nucleic acids using a triple-helix molecular switch for cascade signal amplification

2014 ◽  
Vol 50 (66) ◽  
pp. 9409-9412 ◽  
Author(s):  
Sujuan Ye ◽  
Yanying Wu ◽  
Wen Zhang ◽  
Na Li ◽  
Bo Tang
Keyword(s):  
Nucleic Acids ◽  
Signal Amplification ◽  
Triple Helix ◽  
Detection System ◽  
Molecular Switch ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Multiple Cycle ◽  
Enhanced Raman Scattering

A sensitive surface-enhanced Raman scattering (SERS) detection system is developed for proteins and nucleic acids based on a triple-helix molecular switch for multiple cycle signal amplification.

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