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.

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.

Urchin-like Au-nanoparticles@Ag-nanohemisphere arrays as active SERS-substrates for recognition of PCBs

RSC Advances ◽  
2014 ◽  
Vol 4 (38) ◽  
pp. 19654-19657 ◽  
Author(s):  
Haibin Tang ◽  
Guowen Meng ◽  
Qing Huang ◽  
Chuhong Zhu ◽  
Zhulin Huang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Large Scale ◽  
Au Nanoparticles ◽  
Active Surface ◽  
Sers Substrates ◽  
Highly Active ◽  
Surface Enhanced ◽  
Nanodot Arrays ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Large-scale ordered urchin-like Au-nanoparticles decorated Ag-nanohemisphere nanodot arrays show highly active surface-enhanced Raman scattering effect for rapid recognition of PCB-3.

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...

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