Identification of Listeria Species Using a Low-Cost Surface-Enhanced Raman Scattering System With Wavelet-Based Signal Processing

2009 ◽  
Vol 58 (10) ◽  
pp. 3713-3722 ◽  
Author(s):  
G.C. Green ◽  
A.D.C. Chan ◽  
B.S. Luo ◽  
Hanhong Dan ◽  
Min Lin
Keyword(s):  
Signal Processing ◽  
Raman Scattering ◽  
Low Cost ◽  
Surface Enhanced Raman Scattering ◽  
Scattering System ◽  
Listeria Species ◽  
Surface Enhanced ◽  
Cost Surface ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

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.

Hierarchical growth and morphological control of ordered Cu–Au alloy arrays with high surface enhanced Raman scattering activity

CrystEngComm ◽  
2020 ◽  
Vol 22 (1) ◽  
pp. 113-118 ◽  
Author(s):  
Zhezhe Wang ◽  
Ruihua Liu ◽  
Zhuohong Feng ◽  
Lin Lin ◽  
Rongrong Xie ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Low Cost ◽  
High Surface ◽  
Hierarchical Structures ◽  
Surface Enhanced Raman Scattering ◽  
Atom Ratio ◽  
Morphological Control ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Low-cost Cu–Au alloy hierarchical structures are fabricated by coelectrodeposition, and the highest SERS activity is obtained when the atom ratio of Cu and Au is about 88 : 12.

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