Dual functional PDMS sponge SERS substrate for the on-site detection of pesticides both on fruit surfaces and in juice

The Analyst ◽  
2018 ◽  
Vol 143 (11) ◽  
pp. 2689-2695 ◽  
Author(s):  
Ji Sun ◽  
Lin Gong ◽  
Yuntao Lu ◽  
Dongmei Wang ◽  
Zhengjun Gong ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Pesticide Residues ◽  
Sample Pretreatment ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Dual Functional ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A versatile dual-functional polydimethylsiloxane (PDMS) sponge Surface Enhanced Raman Scattering (SERS) substrate has been fabricated for the on-site detection of pesticide residues both on the surface and in solution with minimum or no sample pretreatment.

scholarly journals Fast and Low-Cost Surface-Enhanced Raman Scattering (SERS) Method for On-Site Detection of Flumetsulam in Wheat

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4662
Author(s):  
Mingming Han ◽  
Hongmei Lu ◽  
Zhimin Zhang
Keyword(s):  
Raman Scattering ◽  
Pesticide Residues ◽  
Low Cost ◽  
Surface Enhanced Raman Scattering ◽  
Enhancement Effect ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Cost Surface ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The pesticide residues in agri-foods are threatening people’s health. This study aims to establish a fast and low-cost surface-enhanced Raman scattering (SERS) method for the on-site detection of flumetsulam in wheat. The two-step modified concentrated gold nanoparticles (AuNPs) acted as the SERS substrate with the aid of NaCl and MgSO4. NaCl is served as the activator to modify AuNPs, while MgSO4 is served as the aggregating agent to form high-density hot spots. The activation and aggregation are two essential collaborative procedures to generate remarkable SERS enhancement and achieve the trace-level detection of flumetsulam. This method exhibits good enhancement effect with an enhancement factor of 106 and wide linear range (5–1000 μg/L). With simple pretreatment, the flumetsulam residue in real wheat samples can be successfully detected with the limit of detection (LOD) down to 0.01 μg/g, which is below the maximum residue limit of flumetsulam in wheat (0.05 μg/g) set in China. The recovery of flumetsulam residue in wheat ranges from 88.3% to 95.6%. These results demonstrate that the proposed SERS method is a powerful technique for the detection of flumetsulam in wheat, which implies the great application potential in the rapid detection of other pesticide residues in various agri-foods.

Hydrophilic-hydrophobic graphitic carbon nitride@silver hybrid substrate for recyclable surface-enhanced Raman scattering-based detection without coffee ring effect

The Analyst ◽  
2021 ◽  
Author(s):  
Yanjia Jiang ◽  
Huimin Sun ◽  
Chenjie Gu ◽  
Yongling Zhang ◽  
Tao Jiang
Keyword(s):  
Raman Scattering ◽  
Carbon Nitride ◽  
Surface Enhanced Raman Scattering ◽  
Graphitic Carbon Nitride ◽  
Sers Substrate ◽  
Organic P ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Coffee Ring Effect

There is a growing interest in developing a multifunctional surface-enhanced Raman scattering (SERS) substrate to deal with the challenge of the pretreatment-free detection and degradation of hazardous molecules in organic...

scholarly journals Development of Effectual Substrates for SERS by Nanostructures-on flexible surfaces

2021 ◽  
Vol 2114 (1) ◽  
pp. 012084
Author(s):  
Hammad R. Humud ◽  
Fatimah Jumaah Moaen
Keyword(s):  
Raman Scattering ◽  
Ag Nanoparticles ◽  
Surface Enhanced Raman Scattering ◽  
Wave Number ◽  
Plasmonic Nanostructures ◽  
Sers Substrate ◽  
Two Dimensional ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Abstract The current study examines recent advancements in surface-enhanced Raman scattering (SERS), a technique that employs flexible surfaces as an active substrate, this surfaces consist from two-dimensional thermo-plasmonic grating. With 53 nm Au layer (was deposited on the 2D grating structure of the PDMS by the PVD method). The explosive wire technique was used to preparing Ag nanoparticles that were used for the purpose of SERS. The effect of the plasmonic nanostructures on the absorption spectra and Surface - Enhanced Raman Scattering (SERS) activities was examined. Rhodamine 6G dye was used as a probe molecule. X-Ray diffraction (XRD) was used to examine the structural characteristics of the nanoparticles. The morphology was assessed using Field Emission Scanning Electron Microscopy(FESEM). A twin beam UV-Vis Spectrophotometer was used to measure the absorption of the combined Rh6G dye (concentration 1×10“–6M) with the nanostructures. a Sunshine Raman microscope system and a 50mm objective lens, used for investigating the Raman spectra of the Rh6G combined with nanostructures. The results showed that the enhancement factor (EF) for SERS of R6G (1×M) reached to (2.2×10 3) When using Ag nanoparticles and (0.08 × 103) when R6G deposited directly on the flexible substrates without nanostructures at the wave number (1650 cm−1), we produced a recyclable, homogeneous, and highly sensitive SERS substrate with dependable reproducibility. For the SERS substrate, a surface made up of two-dimensional (2D) flexible grating substrates was chosen to provide multiple modalities in electrical and medicinal applications.

scholarly journals Performance Improving Method of Aligned Silver Nanorod by Grafting Au@Ag Core–Shell Nanoparticles for Surface-Enhanced Raman Scattering

NANO ◽  
2017 ◽  
Vol 12 (11) ◽  
pp. 1750131 ◽  
Author(s):  
Jian Chen ◽  
Peitao Dong ◽  
Chaoguang Wang ◽  
Chenyu Zhang ◽  
Junfeng Wang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Core Shell ◽  
Sers Substrate ◽  
Shell Nanoparticles ◽  
Simple Method ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Core Shell Nanoparticles

A simple method for improving surface-enhanced Raman scattering (SERS) performance of aligned silver nanorod (Ag NR) array was investigated. This method was to construct a kind of hybrid substrate by grafting Au@Ag core–shell nanoparticles (NPs) into Ag NR array using poly(2-vinylphridine) (P2VPy) as a bridging agent. The hybrid substrate yielded excellent SERS performance as its detection limit improved from 10[Formula: see text] M to 10[Formula: see text] M using trans-1,2-bis(4-pyridyl)ethylene (BPE) as probe molecule, which was increased by two orders of magnitude compared with Ag NR array substrate. The significant improvement of SERS performance of Ag NR arrays was attributed to the addition of Au@Ag core–shell NPs. As a result of surface plasmon resonance generated by the interaction of electromagnetic (EM) (IAEM) filed between NP and NR structures, increasing hotspots were found at the connections of NPs and NRs, the gaps of adjacent rods, and the gaps of two particles consequently. These results were validated by the finite difference time domain (FDTD) calculation. Besides, hybrid substrate shows good performance in stability and reproducibility. The proposed method was simple and robust, which promoted SERS performance of Ag NR array effectively, showing great potential in the application of SERS substrate fabrication and SERS-based bio-chemical sensing.

Tunable porous silver nanostructures for efficient surface-enhanced Raman scattering detection of trace pesticide residues

2018 ◽  
Vol 42 (21) ◽  
pp. 17750-17755 ◽  
Author(s):  
Ruoxuan Jiang ◽  
Wei Xu ◽  
Yifang Wang ◽  
Shaoming Yu
Keyword(s):  
Raman Scattering ◽  
Pesticide Residues ◽  
Surface Enhanced Raman Scattering ◽  
Silver Nanostructures ◽  
Porous Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering ◽  
Porous Silver

Silver porous nanostructures with tunable porosity were fabricated as an excellent enhancing substrate for SERS detection of trace pesticide residues.

scholarly journals Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance

2019 ◽  
Vol 73 (6) ◽  
pp. 665-677 ◽  
Author(s):  
Raymond A. Velez ◽  
Nickolay V. Lavrik ◽  
Ivan I. Kravchenko ◽  
Michael J. Sepaniak ◽  
Marco A. De Jesus
Keyword(s):  
Raman Scattering ◽  
Enhancement Factor ◽  
Surface Enhanced Raman Scattering ◽  
Analytical Performance ◽  
Interparticle Spacing ◽  
Localized Surface Plasmon ◽  
Sers Substrate ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The use of nanomachining methods capable of reproducible construction of nano-arrayed devices have revolutionized the field of plasmonic sensing by the introduction of a diversity of rationally engineered designs. Significant strides have been made to fabricate plasmonic platforms with tailored interparticle gaps to improve their performance for surface-enhanced Raman scattering (SERS) applications. Over time, a dichotomy has emerged in the implementation of SERS for analytical applications, the construction of substrates, optimization of interparticle spacing as a means to optimize electromagnetic field enhancement at the localized surface plasmon level, and the substrate sensitivity over extended areas to achieve quantitative performance. This work assessed the enhancement factor of plasmonic Ag/SiO2/Si disc-on-pillar (DOP) arrays of variable pitch with its analytical performance for quantitative applications. Experimental data were compared with those from finite-difference time-domain (FDTD) simulations used in the optimization of the array dimensions. A self-assembled monolayer (SAM) of benzenethiol rendered highly reproducible signals (RSD ∼4–10%) and SERS substrate enhancement factor (SSEF) values in the orders of 106–108 for all pitches. Spectra corresponding to rhodamine 6G (R6G) and 4-aminobenzoic acid demonstrated the advantages of using the more densely packed DOP arrays with a 160 nm pitch (gap = 40 nm) for quantitation in spite of the strongest SSEF was attained for a pitch of 520 nm corresponding to a 400 nm gap.

Optimizing gold nanostars as a colloid-based surface-enhanced Raman scattering (SERS) substrate

2015 ◽  
Vol 17 (11) ◽  
pp. 114013 ◽  
Author(s):  
Shuai He ◽  
Malvin Wei Cherng Kang ◽  
Fahima Jaleel Khan ◽  
Eddie Khay Ming Tan ◽  
Miguel Arnold Reyes ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Gold Nanostars ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Sensing trace arsenate by surface enhanced Raman scattering using a FeOOH doped dendritic Ag nanostructure

2015 ◽  
Vol 3 (19) ◽  
pp. 10254-10257 ◽  
Author(s):  
Mukul Pradhan ◽  
Siddhartha Maji ◽  
Arun Kumar Sinha ◽  
Soumen Dutta ◽  
Tarasankar Pal
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Probe Molecule ◽  
Sers Substrate ◽  
Arsenic Detection ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

SERS based arsenic detection at ∼10−10 M level with a FeOOH doped (3.5%) uniform dendritic Ag nanostructure. Area mapping shows the uniformity of the SERS substrate taking arsenate as the probe molecule.

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