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 Fabrication of nano/microstructures for SERS substrates using an electrochemical method

2020 ◽  
Vol 11 ◽  
pp. 1568-1576
Author(s):  
Jingran Zhang ◽  
Tianqi Jia ◽  
Xiaoping Li ◽  
Junjie Yang ◽  
Zhengkai Li ◽  
...  
Keyword(s):  
Electrochemical Method ◽  
Treatment Time ◽  
Low Cost ◽  
Three Dimensional ◽  
Electrochemical Process ◽  
Sers Substrate ◽  
Raman Intensity ◽  
Experimental Conditions ◽  
Sers Substrates ◽  
Au Film

Based on an electrochemical method, three-dimensional arrayed nanopore structures are machined onto a Mg surface. The structured Mg surface is coated with a thin gold (Au) film, which is used as a surface-enhanced Raman scattering (SERS) substrate. A rhodamine 6G (R6G) probe molecule is used as the detection agent for the SERS measurement. Different sizes of arrayed micro/nanostructures are fabricated by different treatment time using the electrochemical process. The topographies of these micro/nanostructures and the thickness of the Au film have an influence on the Raman intensity of the Mg substrate. Furthermore, when the thickness of Au film coating is held constant, the Raman intensity on the structured Mg substrates is about five times higher after a treatment time of 1 min when compared with other treatment times. The SERS enhancement factor ranges from 106 to 1.75 × 107 under these experimental conditions. Additionally, a 10−6 mol·L−1 solution of lysozyme was successfully detected using the Mg–Au nanopore substrates. Our low-cost method is reproducible, homogeneous, and suitable for the fabrication of SERS substrates.

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

scholarly journals Fabrication of gold-coated PDMS surfaces with arrayed triangular micro/nanopyramids for use as SERS substrates

2017 ◽  
Vol 8 ◽  
pp. 2271-2282 ◽  
Author(s):  
Jingran Zhang ◽  
Yongda Yan ◽  
Peng Miao ◽  
Jianxiong Cai
Keyword(s):  
Low Cost ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Raman Intensity ◽  
Pdms Substrate ◽  
Pdms Surface ◽  
Sers Substrates ◽  
Au Film ◽  
Indentation Process ◽  
Continuous Indentation

Using the tip-based continuous indentation process, arrays of three-dimensional pyramidal cavities have been successfully machined on a copper template and the structures were successfully transferred to a polydimethylsiloxane (PDMS) surface using a reverse nanoimprinting approach. The structured PDMS surface is coated with a thin Au film, and the final substrate is demonstrated as a surface-enhanced Raman spectroscopy (SERS) substrate. Rhodamine 6G (R6G) was used as a probe molecule in the present study to confirm the SERS measurements. Arrays of micro/nanostructures of different dimensions were formed by the overlap of pyramidal cavities with different adjacent distances using the tip-based continuous indentation process. The effects of the reverse nanoimprinting process and coating process on the final topography of the structures are studied. The experimental results show that the Raman intensity of the Au-film-coated PDMS substrate is influenced by the topography of the micro/nanostructures and by the thickness of the Au film. The Raman intensity of 1362 cm−1 R6G peak on the structured Au-film-coated PDMS substrate is about 8 times higher than the SERS tests on a commercial substrate (Q-SERS). A SERS enhancement factor ranging from 7.5 × 105 to 6 × 106 was achieved using the structured Au-film-coated PDMS surface, and it was demonstrated that the method proposed in this paper is reliable, replicable, homogeneous and low-cost for the fabrication of SERS substrates.

scholarly journals Facilely Flexible Imprinted Hemispherical Cavity Array for Effective Plasmonic Coupling as SERS Substrate

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3196
Author(s):  
Jihua Xu ◽  
Jinmeng Li ◽  
Guangxu Guo ◽  
Xiaofei Zhao ◽  
Zhen Li ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Mechanical Stability ◽  
Coupling Effect ◽  
Low Cost ◽  
Flexible Substrate ◽  
Localized Surface Plasmon ◽  
Sers Substrate ◽  
Ag Nps ◽  
Surface Enhanced Raman ◽  
Sers Detection

The focusing field effect excited by the cavity mode has a positive coupling effect with the metal localized surface plasmon resonance (LSPR) effect, which can stimulate a stronger local electromagnetic field. Therefore, we combined the self-organizing process for component and array manufacturing with imprinting technology to construct a cheap and reproducible flexible polyvinyl alcohol (PVA) nanocavity array decorating with the silver nanoparticles (Ag NPs). The distribution of the local electromagnetic field was simulated theoretically, and the surface-enhanced Raman scattering (SERS) performance of the substrate was evaluated experimentally. The substrate shows excellent mechanical stability in bending experiments. It was proved theoretically and experimentally that the substrate still provides a stable signal when the excited light is incident from different angles. This flexible substrate can achieve low-cost, highly sensitive, uniform and conducive SERS detection, especially in situ detection, which shows a promising application prospect in food safety and biomedicine.

SERS detection of polycyclic aromatic hydrocarbons using a bare gold nanoparticles coupled film system

The Analyst ◽  
2016 ◽  
Vol 141 (14) ◽  
pp. 4359-4365 ◽  
Author(s):  
Hai-Xin Gu ◽  
Kai Hu ◽  
Da-Wei Li ◽  
Yi-Tao Long
Keyword(s):  
Gold Nanoparticles ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Sers Substrate ◽  
Film System ◽  
System P ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Polycyclic Aromatic ◽  
Bare Gold

A facile approach based on a bare gold nanoparticles (Au NPs) coupled film system as the surface-enhanced Raman scattering (SERS) substrate was developed for the effective detection of polycyclic aromatic hydrocarbons (PAHs).

A flexible transparent Ag-NC@PE film as a cut-and-paste SERS substrate for rapid in situ detection of organic pollutants

The Analyst ◽  
2016 ◽  
Vol 141 (20) ◽  
pp. 5864-5869 ◽  
Author(s):  
Ningning Zhou ◽  
Guowen Meng ◽  
Zhulin Huang ◽  
Yan Ke ◽  
Qitao Zhou ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Sers Substrate ◽  
Sers Detection ◽  
Film Substrate ◽  
In Situ Detection

A flexible transparent Ag-NC@PE film substrate is pasted onto contaminated fruits for rapid in situ SERS detection of organic pollutants.

scholarly journals Surface enhanced Raman scattering analysis with filter-based enhancement substrates: A mini review

2021 ◽  
Vol 40 (1) ◽  
pp. 75-92
Author(s):  
Fugang Xu ◽  
Mengren Xuan ◽  
Zixiang Ben ◽  
Wenjuan Shang ◽  
Guangran Ma
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
High Sensitivity ◽  
Cost Effective ◽  
Laboratory Research ◽  
Great Promise ◽  
Sers Substrate ◽  
Filter Membrane ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Abstract Surface enhanced Raman is a powerful analytical tool with high sensitivity and unique specificity and promising applications in various branches of analytical chemistry. Despite the fabrication of ingenious enhancement substrate used in laboratory research, the development of simple, flexible, and cost-effective substrate is also great important for promoting the application of SERS in practical analysis. Recently, paper and filter membrane as support to fabricate flexible SERS substrates received considerable attentions. Paper-based SERS substrate has been reviewed but no summary on filter-based SERS substrate is available. Compared with paper, filter membrane has unique advantage in robust mechanics, diverse component, and tunable pore size. These characteristics endow the filter-based substrates great advantages for practical SERS analysis including simple and low-cost substrate preparation, high efficiency in preconcentration, separation and detection procedure. Therefore, filter-based substrates have shown great promise in SERS analysis in environment monitoring, food safety with high sensitivity and efficiency. As more and more work has been emerged, it is necessary to summarize the state of such a research topic. Here, the research on filter involved SERS analysis in the past eight years is summarized. A short introduction was presented to understand the background, and then the brief history of filter-based substrate is introduced. After that, the preparation of filter-based substrate and the role of filter are summarized. Then, the application of filter involved SERS substrate in analysis is presented. Finally, the challenges and perspective on this topic is discussed.

scholarly journals Detection of Listeria innocua on roll-to-roll produced SERS substrates with gold nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62981-62989 ◽  
Author(s):  
S. Uusitalo ◽  
M. Kögler ◽  
A.-L. Välimaa ◽  
A. Popov ◽  
Yu. Ryabchikov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Pathogen Detection ◽  
Low Cost ◽  
Critical Role ◽  
Listeria Innocua ◽  
Early Prevention ◽  
Sers Substrates ◽  
Roll To Roll ◽  
Sensing Platforms ◽  
Sers Detection

The rapid and accurate detection of food pathogens plays a critical role in the early prevention of foodborne epidemics. Combination of low cost sensing platforms and SERS detection can offer a solution for the pathogen detection.

A New SERS Substrate Based on TiO2 Nanorods Thin Film Assembled Gold Nanoparticles

2015 ◽  
Vol 1096 ◽  
pp. 481-485
Author(s):  
Xu Feng Yu ◽  
Xiu Lan Cheng ◽  
Peng Yu Lv
Keyword(s):  
Thin Films ◽  
Gold Nanoparticles ◽  
Raman Scattering ◽  
Cost Effective ◽  
Noble Metal Nanoparticles ◽  
Sers Substrate ◽  
Sers Substrates ◽  
Physical Sputtering ◽  
Surface Enhanced Raman ◽  
Biochemical Detection

Surface enhanced Raman scattering (SERS) has been proved to be a highly sensitive method to detect organic molecules at very low concentrations. In recent years, many researchers have reported that 1-dimension semiconductor nanomaterials assembled noble metal nanoparticles can get a strong SERS effect. In this paper, we succeeded to synthesize TiO2 nanorod thin films on fluorine-doped tin oxide (FTO) glass with hydrothermal synthesis which were able to be used as SERS substrates. Gold nanoparticles were assembled to TiO2 nanorod thin films using the physical sputtering method and the citrate reduction method, respectively. The field emission scanning electron microscope (FESEM) images show that the later method could achieve the more desirable and uniform distribution of gold nanoparticles. Rhodamine 6G (R6G) was chosen as the probe molecule to study the SERS performance of our novel SERS substrates. Raman scattering measurement proved that the substrates were able to enhance Raman signals by several orders of magnitude and could be applied to biochemical detection. The whole fabrication process was facile and cost-effective, and the SERS activity and reproducibility of the substrates were pretty good.

scholarly journals Silver Inkjet-Printed Electrode on Paper for Electrochemical Sensing of Paraquat

Chemosensors ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 61
Author(s):  
Patricia Batista Deroco ◽  
Dagwin Wachholz Junior ◽  
Lauro Tatsuo Kubota
Keyword(s):  
Low Cost ◽  
Analytical Signal ◽  
Cost Effective ◽  
Electrode System ◽  
Electrochemical Sensing ◽  
Commercial Application ◽  
Chromatographic Paper ◽  
Silver Ink ◽  
Response Range ◽  
Electrochemical Monitoring

The use of fully printed electrochemical devices has gained more attention for the monitoring of clinical, food, and environmental analytes due to their low cost, great reproducibility, and versatility characteristics, serving as an important technology for commercial application. Therefore, a paper-based inkjet-printed electrochemical system is proposed as a cost-effective analytical detection tool for paraquat. Chromatographic paper was used as the printing substrate due its sustainable and disposable characteristics, and an inkjet-printing system deposited the conductive silver ink with no further modification on the paper surface, providing a three-electrode system. The printed electrodes were characterized with scanning electron microscopy, cyclic voltammetry, and chronopotentiometry. The proposed sensor exhibited a large surface area, providing a powerful tool for paraquat detection due to its higher analytical signal. For the detection of paraquat, square-wave voltammetry was used, and the results showed a linear response range of 3.0–100 μM and a detection limit of 0.80 µM, along with the high repeatability and disposability of the sensor. The prepared sensors were also sufficiently selective against interference, and high accuracy (recovery range = 96.7–113%) was obtained when applied to samples (water, human serum, and orange juice), showing the promising applicability of fully printed electrodes for electrochemical monitoring.

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