Synthesis of Silver Decorated Silica Nanospheres for Surface Enhanced Raman Scattering (SERS) Substrates

2016 ◽  
Vol 1133 ◽  
pp. 471-475
Author(s):  
Ahmad Shaharuddin Siti Shafiqah ◽  
Roslan Md Nor ◽  
Y.M. Amin ◽  
David A. Bradley
Keyword(s):  
Raman Scattering ◽  
Sol Gel ◽  
Surface Enhanced Raman Scattering ◽  
Silica Nanospheres ◽  
X Ray Diffraction ◽  
Raman Analysis ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A sol-gel technique has been used to synthesize silver decorated silica nanospheres for surface enhanced Raman scattering (SERS) substrates. X- Ray diffraction (XRD) spectra shows peak at 2θ = 38.1, 44.6, 64.7, and 77.5°confirming the presence of Ag nanoparticles on the substrates. The Ag- decorated silica nanospheres were applied as SERS substrates using Rhodamine 6G (R6G) as probe molecule. From Raman analysis, the highest SERS enhancement factor at R6G concentration of 102was calculated around ~1010.

Superhydrophobic Ag–Cu Composite Metal Film as Surface-Enhanced Raman Scattering Substrate

NANO ◽  
2018 ◽  
Vol 13 (07) ◽  
pp. 1850083 ◽  
Author(s):  
Jianchao Wang ◽  
Hongsheng Luo ◽  
Xuliang Song ◽  
Xihong Zu ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Metal Film ◽  
Surface Enhanced Raman Scattering ◽  
X Ray Diffraction ◽  
Characterization Methods ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Calculation Results ◽  
Enhanced Raman Scattering

In this paper, a superhydrophobic Ag–Cu composite metal film was fabricated as surface-enhanced Raman scattering substrate. Ag–Cu composite metal film was prepared from galvanic displacement on commercial copper foil. The prepared silver films were modified by PFDT to create a stable superhydrophobic SERS platform. Superhydrophobic substrates were characterized by a variety of characterization methods, including scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Vis, XPS and Raman spectra. The superhydrophobic substrate could enrich probing molecules with the volatilization of solvent. Mathematical model was presented and applied to investigate concentration factor of hydrophobic substrate. The measurements were in good agreement with the calculation results. The superhydrophobic Ag–Cu composite metal film can reduce the detection limits and provide a new way to prepare efficient SERS substrates for ultra-low concentration detection.

scholarly journals Large-Scale Fabrication of Ultrasensitive and Uniform Surface-Enhanced Raman Scattering Substrates for the Trace Detection of Pesticides

Nanomaterials ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 520 ◽  
Author(s):  
Jia Zhu ◽  
Guanzhou Lin ◽  
Meizhang Wu ◽  
Zhuojie Chen ◽  
Peimin Lu ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Large Scale ◽  
Capillary Flow ◽  
Surface Enhanced Raman Scattering ◽  
Ag Nps ◽  
Uniform Size ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Technology transfer from laboratory into practical application needs to meet the demands of economic viability and operational simplicity. This paper reports a simple and convenient strategy to fabricate large-scale and ultrasensitive surface-enhanced Raman scattering (SERS) substrates. In this strategy, no toxic chemicals or sophisticated instruments are required to fabricate the SERS substrates. On one hand, Ag nanoparticles (NPs) with relatively uniform size were synthesized using the modified Tollens method, which employs an ultra-low concentration of Ag+ and excessive amounts of glucose as a reducing agent. On the other hand, when a drop of the colloidal Ag NPs dries on a horizontal solid surface, the droplet becomes ropy, turns into a layered structure under gravity, and hardens. During evaporation, capillary flow was burdened by viscidity resistance from the ropy glucose solution. Thus, the coffee-ring effect is eliminated, leading to a uniform deposition of Ag NPs. With this method, flat Ag NPs-based SERS active films were formed in array-well plates defined by hole-shaped polydimethylsiloxane (PDMS) structures bonded on glass substrates, which were made for convenient detection. The strong SERS activity of these substrates allowed us to reach detection limits down to 10−14 M of Rhodamine 6 G and 10−10 M of thiram (pesticide).

Sol-gel SiO2 films containing colloidal copper particles for surface-enhanced raman scattering of graphite

1998 ◽  
Vol 29 (9) ◽  
pp. 763-771 ◽  
Author(s):  
F. J. García-Rodríguez ◽  
J. González-Hernández ◽  
F. Pérez-Robles ◽  
Y. V. Vorobiev ◽  
A. Manzano-Ramírez ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Sol Gel ◽  
Surface Enhanced Raman Scattering ◽  
Sio2 Films ◽  
Copper Particles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Binary “island” shaped arrays with high-density hot spots for surface-enhanced Raman scattering substrates

Nanoscale ◽  
2018 ◽  
Vol 10 (29) ◽  
pp. 14220-14229 ◽  
Author(s):  
Weidong Zhao ◽  
Shuyuan Xiao ◽  
Yuxian Zhang ◽  
Dong Pan ◽  
Jiahui Wen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Hot Spots ◽  
Surface Enhanced Raman Scattering ◽  
High Density ◽  
Self Assembled Monolayer ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Self Assembled

The BISA with high-density hot spots as reproducible SERS substrates by combining an opal structure with self-assembled monolayer AuNPs is demonstrated.

scholarly journals Application of Novel Plasmonic Nanomaterials on SERS

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2308
Author(s):  
Grégory Barbillon
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Plasmonic Materials ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Bimetallic Materials ◽  
Enhanced Raman Scattering

During these past two decades, the fabrication of ultrasensitive surface-enhanced Raman scattering (SERS) substrates has explosed by using novel plasmonic materials such bimetallic materials (e [...]

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