In situ thermally induced reduction of silver nitrate by polyvinyl alcohol to prepare a three-dimensional porous Ag substrate with excellent adsorption and surface-enhanced Raman scattering properties

2020 ◽  
Vol 8 (19) ◽  
pp. 6478-6487 ◽  
Author(s):  
Bin Yuan ◽  
Jia Guo ◽  
Shibing Bai
Keyword(s):  
Polyvinyl Alcohol ◽  
Three Dimensional ◽  
Thermally Induced ◽  
Surface Enhanced ◽  
Silver Substrate ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Porous Silver ◽  
Ag Substrate

A 3D porous silver substrate prepared using a PVA/AgNO3 composite film has excellent SERS properties.

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.

Highly active Au NP microarray films for direct SERS detection

2019 ◽  
Vol 7 (48) ◽  
pp. 15259-15268 ◽  
Author(s):  
Lingling Zhang ◽  
Xiaodie Li ◽  
Weihua Liu ◽  
Rui Hao ◽  
Hongrui Jia ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Au Nanoparticles ◽  
Three Dimensional ◽  
Pdms Film ◽  
Highly Active ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering

In this study, we demonstrated a flexible transparent three-dimensional (3D) ordered micro-hemisphere (MHS) array PDMS film with self-assembled Au nanoparticles (NPs) (an Au NP-MHS array film) as a surface-enhanced Raman scattering (SERS) platform for the in situ detection of pesticides in food.

In-Situ Detection of Fluid Media Based on Three-Dimensional Dendritic Silver Surface-Enhanced Raman Scattering Substrate

2022 ◽  
Author(s):  
Sha Li ◽  
Zezhou Wang ◽  
Yunpeng Shao ◽  
Kai Zhang ◽  
Linyu Mei ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Three Dimensional ◽  
Microfluidic Channel ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Silver Surface ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In this paper, a highly active surface enhanced Raman scattering (SERS) substrate based on three-dimensional (3D) dendritic silver nanostructure was constructed in microfluidic channel by one-step electrodisplacement reaction for in-situ...

Fast assessment of oxo-biodegradable polyethylene film oxidation by surface-enhanced Raman scattering with in situ formation of a silver nanoparticle substrate

2017 ◽  
Vol 5 (2) ◽  
pp. 463-469 ◽  
Author(s):  
Magdalena Wrona ◽  
Jesús Salafranca ◽  
Cristina Nerín
Keyword(s):  
Raman Scattering ◽  
Silver Nanoparticle ◽  
Surface Enhanced Raman Scattering ◽  
Polyethylene Film ◽  
Surface Enhanced ◽  
Silver Substrate ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
In Situ Formation

A silver substrate for SERS generatedin situon an oxo-biodegradable polyethylene film for assessment of its oxidation upon exposure to different agents.

Nitrogen-doped graphene network supported copper nanoparticles encapsulated with graphene shells for surface-enhanced Raman scattering

Nanoscale ◽  
2015 ◽  
Vol 7 (40) ◽  
pp. 17079-17087 ◽  
Author(s):  
Xiang Zhang ◽  
Chunsheng Shi ◽  
Enzuo Liu ◽  
Jiajun Li ◽  
Naiqin Zhao ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Chemical Vapor ◽  
Surface Enhanced Raman Scattering ◽  
Nitrogen Doped ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Enhanced Raman Scattering

Nitrogen-doped graphene network supported graphene shell encapsulated Cu nanoparticles for surface-enhanced Raman scattering were constructed by in situ chemical vapor deposition.

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