Synthesis of Silver Nanoparticles through the Soft Template Method and their Applications to Surface-Enhanced Raman Scattering

2013 ◽  
Vol 395-396 ◽  
pp. 158-161 ◽  
Author(s):  
Yu Dong Lu ◽  
Xia Xia Chen ◽  
Li Hui Chen
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Carboxymethyl Cellulose ◽  
Surface Enhanced Raman Scattering ◽  
Soft Template ◽  
Sers Spectrum ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Silver Nanoparticles has been prepared using the complex of carboxymethyl cellulose (CMC) and Polyvinylpyrrolidone (PVP) as a template and used as SERS substrate. The effect of the ratio of CMC to PVP on silver nanoparticles was discussed. Silver Nanoparticles were characterized by UV-visible spectroscopy, transmission electron microscopy and Raman spectroscopy. The results show that the ratio of CMC to PVP plays a crucial role in the performance of nanoparticles. TEM studies reveal that particles are mostly near-spherical in shape with an average size of 60-70 nm. The SERS enhancement of these silver nanoparticles was tested by using Rhodamine 6G (R6G) as a probe molecule. The silver nanoparticles prepared with the complex of CMC and PVP as a template have been shown to provide strong enhancements in the SERS spectrum of R6G. Keywords: Carboxymethyl cellulose; Polyvinylpyrrolidone; Surface-enhanced Raman scattering; silver; Template

scholarly journals Quasi-three-dimension Structured Surface-enhanced Raman Scattering Substrates Based on Silver Nanoparticles/ Porous Silicon Hybrid

2021 ◽  
Author(s):  
Thuy Van Nguyen ◽  
Duc Chinh Vu ◽  
Huy Bui ◽  
Thanh Binh Pham ◽  
Thi Hong Cam Hoang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Porous Silicon ◽  
Raman Scattering ◽  
Electrochemical Sensors ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Three Dimension ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Abstract Surface-enhanced Raman scattering (SERS) is a powerful spectroscopic technique for ultrasensitive and selective bio-chemical detection due to its capability of providing “fingerprint” information of molecular structures in low concentrations even at single molecular level. In this work, we present the silver nanoparticles/porous silicon (AgNPs/PSi) hybrid structures as SERS substrates prepared by a fast, straightforward and effective method using the PSi immersion plating in silver nitrate (AgNO3) solution. The nano-silvers can simultaneously grow on the surface and nano-pillars of porous silicon making quasi-three-dimension (quasi-3D) structural SERS substrate that has a large surface area to adsorb moleculars for SERS measurement. The proposed SERS substrate can detect Diphenylamine (DPA) with ultralow concentration of 10-9 M (~0.17 ppb), which would have higher enhancement than 2D surface SERS based on nano-silver deposited on silicon substrate and other electrochemical sensors.

scholarly journals Surface-Enhanced Raman Scattering Detection of Fipronil Pesticide Adsorbed on Silver Nanoparticles

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1355 ◽  
Author(s):  
Nguyễn Hoàng Ly ◽  
Thi Ha Nguyen ◽  
Ngô Đình Nghi ◽  
Young-Han Kim ◽  
Sang-Woo Joo
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Density Functional ◽  
Surface Enhanced Raman Scattering ◽  
Potential Energy Distribution ◽  
Raman Shift ◽  
Sers Spectrum ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

This work presents a surface-enhanced Raman scattering (SERS) and density functional theory (DFT) study of a fipronil adsorbed on colloidal silver nanoparticles (AgNPs). A standard curve was established to quantify fipronil within a range of 0.0001–0.1 ppm (r2 ≥ 0.985), relying on the unique fipronil Raman shift at ~2236 cm−1 adsorbed on AgNPs. DFT calculations suggest that the nitrile moiety (C≡N) binding should be slightly more favorable, by 1.92 kcal/mol, than those of the nitrogen atom of the pyrazole in fipronil and Ag6 atom clusters. The characteristic peaks of the SERS spectrum were identified, and both the calculated vibrational wavenumbers and the Raman intensity pattern were considered. The vibrational spectra of fipronil were obtained from the potential energy distribution (PED) analysis and selective Raman band enhancement.

Silver Nanoparticle-Doped Polyvinyl Alcohol Coating as a Mediumfor Surface-Enhanced Raman Scattering Analysis

2008 ◽  
Vol 8 (2) ◽  
pp. 955-960 ◽  
Author(s):  
Seher Karabıçak ◽  
Murat Kaya ◽  
Tuan Vo-Dinh ◽  
Mürvet Volkan
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Benzoic Acid ◽  
Polyvinyl Alcohol ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Experimental Conditions ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A simple polymer substrate for inducing Surface-Enhanced Raman Scattering (SERS) has been investigated. This SERS substrate consists of a solid support, such as a glass slide covered with polyvinyl alcohol (PVA) impregnated with fine silver nanoparticles. The preparation simply involves mixing aqueous PVA polymer with solid AgNO3 to produce a solution that can be easily spin coated on the glass substrate and dried to obtain a hard translucent coating. Aqueous solution of FeSO4·7H2O was used to reduce Ag+ ions to silver nanoparticles. The effects of various experimental conditions of sample preparation were investigated in order to improve the Raman enhancement efficiency of the substrate. The overall substrate performance was evaluated with the use of biologically important compounds: benzoic acid, p-amino benzoic acid, pyridine and dopamine. The spectral features of these compounds closely matched with those reported in literature. The use of the polymer matrix made the SERS substrate resistant to scratching, therefore, improving it to be more suitable for field applications. The hydrophilic nature of the polymer provides additional advantages for probing biological samples. The shelf-life of the dried, unreduced substrates is at least one month.

A facile surface enhanced Raman scattering substrate based on silver deposited sandpaper

2019 ◽  
Vol 33 (21) ◽  
pp. 1950239 ◽  
Author(s):  
Dongdong Yuan ◽  
Shu Chen ◽  
Yanan Wu ◽  
Junqiao Wang
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Excitation Wavelength ◽  
Enhancement Effect ◽  
Sers Substrate ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Flexible surface enhanced Raman scattering (SERS) substrate was prepared by modification of sandpaper with silver nanoparticles. Under 633 nm excitation wavelength, the SERS enhancement effect of sandpapers which were treated with silver nanoparticles were evaluated by collecting Raman signals of probed molecules. The results demonstrate that the SERS enhancement effect of white (12,000 meshes) is better than that of pink (8000 meshes) sandpaper under the same condition; when the concentration of probe molecules is [Formula: see text] mol/L, white sandpaper has the best SERS enhancement; the Raman scattering spectrum has better signal when the silver sol is 15 [Formula: see text].

scholarly journals A DFT Approach to the Surface-Enhanced Raman Scattering of 4-Cyanopyridine Adsorbed on Silver Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1211 ◽  
Author(s):  
Isabel López-Tocón ◽  
Samuel Valdivia ◽  
Juan Soto ◽  
Juan Carlos Otero ◽  
Francesco Muniz-Miranda ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Active Sites ◽  
Density Functional ◽  
Surface Enhanced Raman Scattering ◽  
Sers Spectrum ◽  
Functional Theory ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A Surface-Enhanced Raman Scattering (SERS) spectrum of 4-cyanopyridine (4CNPy) was recorded on silver plasmonic nanoparticles and analyzed by using Density Functional Theory (DFT) calculations. Two simple molecular models of the metal–4CNPy surface complex with a single silver cation or with a neutral dimer (Ag+–4CNPy, Ag2–4CNPy), linked through the two possible interacting sites of 4CNPy (aromatic nitrogen, N, and nitrile group, CN), were considered. The calculated vibrational wavenumbers and intensities of the adsorbate and the isolated species are compared with the experimental Raman and SERS results. The analysis of the DFT predictions and the experimental data indicates that 4CNPy adsorbs preferentially on neutral/charged active sites of the silver nanoparticles through the nitrogen atom of the aromatic ring with a perpendicular orientation.

Surface-enhanced Raman scattering activities of carbon nanotubes decorated with silver nanoparticles

The Analyst ◽  
2016 ◽  
Vol 141 (19) ◽  
pp. 5527-5534 ◽  
Author(s):  
Xiaolei Zhang ◽  
Jie Zhang ◽  
Jiamin Quan ◽  
Ning Wang ◽  
Yong Zhu
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Reduction Method ◽  
Low Cost ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Citrate Reduction

We synthesized a carbon nanotube (CNT) loaded with silver nanoparticles (AgNPs) composite as an effective surface enhanced Raman scattering (SERS) substrate via a low-cost, simple citrate reduction method.

scholarly journals DETECTION OF ADENOVIRUS ANTIGEN BY A SURFACE-ENHANCED RAMAN SCATTERING ENZYME-LINKED IMMUNOSORBENT ASSAY

2019 ◽  
Vol 1 (3) ◽  
pp. 25-31 ◽  
Author(s):  
A. M. Kudryashova ◽  
A. G. Galstian ◽  
E. B. Faizuloev ◽  
A. Yu. Olenin ◽  
G. V. Lisichkin ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Colorimetric Detection ◽  
Surface Enhanced Raman Scattering ◽  
Enzyme Linked Immunosorbent Assay ◽  
Sers Substrate ◽  
Healthy Children ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Aim. Study of the possibility of adenovirus antigen detection by recording of surface-enhanced Raman scattering (SERS) spectra of enzyme oxidized product of 3,3',5,5'-tetramethylbenzidine. Materials and methods. Clinical fecal samples containing adenoviruses, group A rotaviruses, noroviruses and healthy children samples, as well as laboratory strains of adenoviruses with a titer of 5 — 6 lg TCD50/ml were used. Sandwich immunoassay was used, the Raman spectra were recorded by a Raman spectrometer (532 nm) after incubation with silver nanoparticles. Results. The concordance of the adenovirus detection results was obtained in comparison with the enzyme immunoassay method with colorimetric detection and PCR. Conclusion. The possibility of TMB+ using as a SERS reporter and silver nanoparticles as a SERS substrate for the detection of adenovirus antigen in complex biological samples was shown.

Determination of the illegal adulteration of natural healthcare products with chemical drugs using surface-enhanced Raman scattering

The Analyst ◽  
2018 ◽  
Vol 143 (21) ◽  
pp. 5202-5209 ◽  
Author(s):  
Jiawei Wu ◽  
Lixia Zhang ◽  
Xiangfeng Bu ◽  
Peng Li ◽  
Bing Zhao ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Sodium Alginate ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Coffee Ring Effect

Silver nanoparticles stabilized using sodium alginate were synthesized as SERS substrate to determine vardenafil and rosiglitazone maleate based on the coffee ring effect.

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