Cellulose Dialysis Membrane Tubing doped with Gold Nanoparticles as SERS Substrate

2022 ◽  
pp. 131718
Author(s):  
L.F. Gomez –Caballero ◽  
J.L. Pichardo-Molina ◽  
G. Basurto-Islas
Keyword(s):  
Gold Nanoparticles ◽  
Sers Substrate ◽  
Dialysis Membrane

scholarly journals Commercial Gold Nanoparticles on Untreated Aluminum Foil: Versatile, Sensitive, and Cost-Effective SERS Substrate

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Kristina Gudun ◽  
Zarina Elemessova ◽  
Laura Khamkhash ◽  
Ekaterina Ralchenko ◽  
Rostislav Bukasov
Keyword(s):  
Gold Nanoparticles ◽  
Low Cost ◽  
Aluminum Foil ◽  
Cost Effective ◽  
Sers Substrate ◽  
Au Film ◽  
Response Range ◽  
Sers Detection ◽  
Film Substrate ◽  
Linear Response Range

We introduce low-cost, tunable, hybrid SERS substrate of commercial gold nanoparticles on untreated aluminum foil (AuNPs@AlF). Two or three AuNP centrifugation/resuspension cycles are proven to be critical in the assay preparation. The limits of detection (LODs) for 4-nitrobenzenethiol (NBT) and crystal violet (CV) on this substrate are about 0.12 nM and 0.19 nM, respectively, while maximum analytical SERS enhancement factors (AEFs) are about 107. In comparative assays LODs for CV measured on AuNPs@Au film and AuNPs@glass are about 0.35 nM and 2 nM, respectively. The LOD for melamine detected on AuNPs@ Al foil is 27 ppb with 3 orders of magnitude for linear response range. Overall, AuNPs@AlF demonstrated competitive performance in comparison with AuNPs@ Au film substrate in SERS detection of CV, NBT, and melamine. To check the versatility of the AuNPs@AlF substrate we also detected KNO3 with LODs of 0.7 mM and SERS EF around 2 × 103, which is on the same order with SERS EF reported for this compound in the literature.

scholarly journals Gold Nanoparticles with Different Particle Sizes for the Quantitative Determination of Chlorpyrifos Residues in Soil by SERS

2019 ◽  
Vol 20 (11) ◽  
pp. 2817 ◽  
Author(s):  
Yong He ◽  
Shupei Xiao ◽  
Tao Dong ◽  
Pengcheng Nie
Keyword(s):  
Gold Nanoparticles ◽  
Limit Of Detection ◽  
Soil Surface ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Least Squares Regression ◽  
Simple Method ◽  
Good Linear ◽  
Relative Standard

Chlorpyrifos (CPF) is widely used in the prevention and control of crop pests and diseases in agriculture. However, the irrational utilization of pesticides not only causes environmental pollution but also threatens human health. Compared with the conventional techniques for the determination of pesticides in soil, surface-enhanced Raman spectroscopy (SERS) has shown great potential in ultrasensitive and chemical analysis. Therefore, this paper reported a simple method for synthesizing gold nanoparticles (AuNPs) with different sizes used as a SERS substrate for the determination of CPF residues in soil for the first time. The results showed that there was a good linear correlation between the SERS characteristic peak intensity of CPF and particle size of the AuNPs with an R2 of 0.9973. Moreover, the prepared AuNPs performed great ultrasensitivity, reproducibility and chemical stability, and the limit of detection (LOD) of the CPF was found to be as low as 10 μg/L. Furthermore, the concentrations ranging from 0.01 to 10 mg/L were easily observed by SERS with the prepared AuNPs and the SERS intensity showed a good linear relationship with an R2 of 0.985. The determination coefficient (Rp2) reached 0.977 for CPF prediction using the partial least squares regression (PLSR) model and the LOD of CPF residues in soil was found to be as low as 0.025 mg/kg. The relative standard deviation (RSD) was less than 3.69% and the recovery ranged from 97.5 to 103.3%. In summary, this simple method for AuNPs fabrication with ultrasensitivity and reproducibility confirms that the SERS is highly promising for the determination of soil pesticide residues.

Functionalized Gold Nanoparticles Coated Polymer Spheres as SERS Substrate for the Detection of TNT Explosives

2014 ◽  
Vol 924 ◽  
pp. 366-370 ◽  
Author(s):  
Hai Xin Gu ◽  
Lin Xue ◽  
Ya Heng Zhang ◽  
Yong Feng Zhang ◽  
Li Ying Cao
Keyword(s):  
Gold Nanoparticles ◽  
Sodium Citrate ◽  
Polymer Surface ◽  
Sers Substrate ◽  
Conjugation System ◽  
Sers Detection ◽  
Polymer Sphere ◽  
Real World Situation ◽  
Tnt Detection ◽  
Polymer Spheres

In this paper, we fabricated the 4-aminobenzenethiol modified gold nanoparticles onto polymer spheres as SERS substrate to selectively detect 2,4,6-trinitrotoluene (TNT) explosives. The gold nanoseeds were fixed on polymer surface by reduction of HAuCl4·3H2O with sodium citrate. About 60~100nm nanoparticles were formed from the previous seeds and self-assembled by 4-aminobenzenethiol. The functionalized gold nanopartilces aggregation coated on large polymer sphere surface not only absorbed more TNT molecules via conjugation system, but also generated numerous "hot spots". It was demonstrated that this substrate displayed high SERS activity for TNT detection. It could also be anticipated that the aforementioned material would be used for fast and sensitive SERS detection of TNT in real-world situation. Keywords: gold nanopartilces, SERS, TNT, functionalization

Opal-Type Photonic Crystals: Fabrication and Application

2010 ◽  
Vol 71 ◽  
pp. 50-57 ◽  
Author(s):  
Andrea Chiappini ◽  
Guillaume Alombert-Goget ◽  
Cristina Armellini ◽  
Simone Berneschi ◽  
Brigitte Boulard ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colloidal Crystal ◽  
Photonic Band Gap ◽  
Blue Shift ◽  
Optical Measurements ◽  
Localized Surface Plasmon ◽  
Raman Signal ◽  
Sers Substrate ◽  
Silica Network ◽  
Elastomeric Matrix

We report on fabrication and characterization of two different opal-like structures: (i) crystal exhibiting mechanochromism, i.e. change of colour when subjected to mechanical stress, composed of closely packed colloidal polystyrene particles (CPCP) embedded in a poly-dimethylsiloxane (PDMS) elastomeric matrix; (ii) metallo-dielectric systems (MDCS), based on the realization of inverse silica opal and following attachment of gold nanoparticles on the silica network of the inverse colloidal structure. Optical measurements, performed on the two structures, have demonstrated that: (i) when an horizontal strain is applied on the CPCP embedded in PDMS, a blue shift of the diffraction peak occurs as a function of the applied strain and (ii) MDCS have unique optical properties that combine the localized surface plasmon resonance (LSPR) of gold nanoparticles (Au NPs) with the photonic band gap features of colloidal crystal structures. Finally, preliminary results on MDCS used as SERS substrate evidence a higher increase of the Raman signal in respect to that observed for others metallic structures.

A new heterostructured SERS substrate: free-standing silicon nanowires decorated with graphene-encapsulated gold nanoparticles

Nanoscale ◽  
2017 ◽  
Vol 9 (16) ◽  
pp. 5263-5272 ◽  
Author(s):  
Yuan Li ◽  
John Dykes ◽  
Todd Gilliam ◽  
Nitin Chopra
Keyword(s):  
Gold Nanoparticles ◽  
Silicon Nanowires ◽  
Sers Substrate ◽  
Free Standing

scholarly journals One Step Photochemical Synthesis of Surface-Supported Naked Gold Nanoparticles and Its Application as a SERS Substrate

2021 ◽  
Author(s):  
Pablo A. Mercadal ◽  
Sergio David Garcia Schejtman ◽  
Fernando P. Cometto ◽  
Alicia V. Veglia ◽  
Eduardo A. Coronado
Keyword(s):  
Gold Nanoparticles ◽  
Photochemical Synthesis ◽  
Raman Signal ◽  
Sers Substrate ◽  
Straightforward Method ◽  
Gold Precursor ◽  
One Step ◽  
Supported Gold Nanoparticles ◽  
Supported Gold ◽  
Pulsed Laser Irradiation

<p>A direct and straightforward method is proposed to synthetize a surface-supported gold nanoparticles mediated by pulsed laser irradiation of quartz surfaces in contact with a gold precursor solutions. The substrates´ performance as SERS sensors is tested by the Rhodamine 6G (R6G) Raman signal enhancement.</p>

Carbon nanostructure (0-3 dimensional) supported isolated gold nanoparticles as an effective SERS substrate

2018 ◽  
Vol 273 ◽  
pp. 455-465 ◽  
Author(s):  
Shiju Abraham ◽  
Matthias König ◽  
Sunil K. Srivastava ◽  
Vinod Kumar ◽  
Bernd Walkenfort ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Sers Substrate ◽  
Carbon Nanostructure ◽  
3 Dimensional

scholarly journals Hydrophobic Paper-Based SERS Sensor Using Gold Nanoparticles Arranged on Graphene Oxide Flakes

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5471 ◽  
Author(s):  
Dong-Jin Lee ◽  
Dae Yu Kim
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Limit Of Detection ◽  
Point Of Care ◽  
Hydrophobic Surface ◽  
Sers Substrate ◽  
High Porosity ◽  
Paper Substrate ◽  
Surface Enhanced Raman ◽  
Hydrophobic Paper

Paper-based surface-enhanced Raman scattering (SERS) sensors have garnered much attention in the past decade owing to their ubiquity, ease of fabrication, and environmentally friendly substrate. The main drawbacks of a paper substrate for a SERS sensor are its high porosity, inherent hygroscopic nature, and hydrophilic surface property, which reduce the sensitivity and reproducibility of the SERS sensor. Here, we propose a simple, quick, convenient, and economical method for hydrophilic to hydrophobic surface modification of paper, while enhancing its mechanical and moisture-resistant properties. The hydrophobic paper (h-paper) was obtained by spin-coating diluted polydimethylsiloxane (PDMS) solution onto the filter paper, resulting in h-paper with an increased contact angle of up to ≈130°. To complete the h-paper-based SERS substrate, gold nanoparticles arranged on graphene oxide (AuNPs@GO) were synthesized using UV photoreduction, followed by drop-casting of AuNPs@GO solution on the h-paper substrate. The enhancement of the SERS signal was then assessed by attaching a rhodamine 6G (R6G) molecule as a Raman probe material to the h-paper-based SERS substrate. The limit of detection was 10 nM with an R2 of 0.966. The presented SERS sensor was also tested to detect a thiram at the micromolar level. We expect that our proposed AuNPs@GO/h-paper-based SERS sensor could be applied to point-of-care diagnostics applications in daily life and in spacecraft.

SERS properties of biogenic gold nanoparticles synthesized using Anemopsis californica extract.

MRS Advances ◽  
2020 ◽  
Vol 5 (63) ◽  
pp. 3397-3406
Author(s):  
R. D. Ávila-Avilés ◽  
Marco A. Camacho-López ◽  
E. Castro-Longoria ◽  
A. Dorazco-González ◽  
N. Hernández-Guerrero ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Raman Signal ◽  
Sers Substrate ◽  
Anemopsis Californica ◽  
Glass Slides ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Biological Methods

AbstractGold nanoparticles (AuNPs) have been classified as one of the most attractive nanotechnologies, thanks to their potential or already implemented applications; therefore, biological methods for their synthesis have been widely investigated. This study explores the synthesis of AuNPs using the extract of Anemopsis californica, and determinates the effect of the solvent used (water, methanol, and isopropanol) to obtain the AuNPs. Biogenic nanoparticles were analysed through UV-Vis spectroscopy and transmission electron microscopy (TEM, HRTEM, and SAED). Significant differences in polydispersity and morphology of AuNPs among the different methods used were found; the aqueous extract and the extract based on methanol formed nanotriangles and polyhedral nanoparticles; the shape of the nanoparticles is predominantly polyhedral when isopropanol is used as the solvent. The as obtained nanoparticles were placed on glass slides to perform Surface-Enhanced Raman Scattering (SERS) experiments, an amplification of the methylene blue Raman signal was observed when triangular nanoparticles cover the biogenic SERS substrate.

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