Improving the SERS detection sensitivity of aromatic molecules by a PDMS-coated Au nanoparticle monolayer film

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53306-53312 ◽  
Author(s):  
Chen Qian ◽  
Qinghua Guo ◽  
Minmin Xu ◽  
Yaxian Yuan ◽  
Jianlin Yao
Keyword(s):  
Detection Sensitivity ◽  
Au Nanoparticle ◽  
Monolayer Film ◽  
Pdms Film ◽  
Aromatic Molecules ◽  
Composite Substrate ◽  
Sers Detection

In this paper, we reported a facile strategy to fabricate a PDMS film-coated Au nanoparticle monolayer film (Au MLF) composite substrate for improving SERS detection of aromatic molecules in water and in the atmosphere.

scholarly journals Flexible and Reusable Ag Coated TiO2 Nanotube Arrays for Highly Sensitive SERS Detection of Formaldehyde

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1199 ◽  
Author(s):  
Tong Zhu ◽  
Hang Wang ◽  
Libin Zang ◽  
Sila Jin ◽  
Shuang Guo ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Surface Enhanced Raman Spectroscopy ◽  
Catalytic Performance ◽  
Tio2 Nanotube ◽  
Detection Sensitivity ◽  
Sers Substrate ◽  
Environmental Media ◽  
Sensing Platform ◽  
Surface Enhanced Raman ◽  
Sers Detection

Quantitative analysis of formaldehyde (HCHO, FA), especially at low levels, in various environmental media is of great importance for assessing related environmental and human health risks. A highly efficient and convenient FA detection method based on surface-enhanced Raman spectroscopy (SERS) technology has been developed. This SERS-based method employs a reusable and soft silver-coated TiO2 nanotube array (TNA) material, such as an SERS substrate, which can be used as both a sensing platform and a degradation platform. The Ag-coated TNA exhibits superior detection sensitivity with high reproducibility and stability compared with other SERS substrates. The detection of FA is achieved using the well-known redox reaction of FA with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) at room temperature. The limit of detection (LOD) for FA is 1.21 × 10−7 M. In addition, the stable catalytic performance of the array allows the degradation and cleaning of the AHMT-FA products adsorbed on the array surface under ultraviolet irradiation, making this material recyclable. This SERS platform displays a real-time monitoring platform that combines the detection and degradation of FA.

Enhanced light–matter interaction of graphene–gold nanoparticle hybrid films for high-performance SERS detection

2014 ◽  
Vol 2 (23) ◽  
pp. 4683-4691 ◽  
Author(s):  
Yuanxin Du ◽  
Yuan Zhao ◽  
Yan Qu ◽  
Chia-Hao Chen ◽  
Chieh-Ming Chen ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
High Performance ◽  
Au Nanoparticle ◽  
Hybrid Films ◽  
High Quality ◽  
Matter Interaction ◽  
Sers Detection ◽  
Light Matter Interaction

We demonstrate enhanced light–matter interactions in graphene–Au nanoparticle hybrid films and the application for high-quality SERS detection.

Au nanoparticle-modified WO3 nanoflowers/TiO2 nanotubes used for the SERS detection of dyes

2017 ◽  
Vol 41 (22) ◽  
pp. 13968-13973 ◽  
Author(s):  
Bing Zhang ◽  
Xuehua Yin ◽  
Deshuai Zhen ◽  
Wenhong Gu ◽  
Yingju Liu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Tio2 Nanotubes ◽  
Au Nanoparticle ◽  
Sers Detection ◽  
First Time

WO3 nanoflowers were successfully fabricated for the first time on a TiO2 nanotube substrate via a hydrothermal method.

scholarly journals Bio-Specific Au/Fe3+ Porous Spongy Nanoclusters for Sensitive SERS Detection of Escherichia coli O157:H7

Biosensors ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 354
Author(s):  
Yuzhi Li ◽  
Fei Gao ◽  
Chang Lu ◽  
Marie-Laure Fauconnier ◽  
Jinkai Zheng
Keyword(s):  
Escherichia Coli ◽  
Food Samples ◽  
Detection Sensitivity ◽  
Quantitative Detection ◽  
Raman Signal ◽  
Escherichia Coli O157 ◽  
E Coli ◽  
Fast Detection ◽  
Sers Detection ◽  
Modified Magnetic Nanoparticles

For sensitive and fast detection of Escherichia coli O157:H7, organic and inorganic hybrid Au/Fe3+ nanoclusters (NCs) were synthesized for the first time using gold nanoparticles (GNPs), bovine serum albumin, ferric chloride, phosphate-buffered saline, and antibodies. The Au/Fe3+ porous spongy NCs with large surface area showed excellent bio-specific capability for E. coli O157:H7. GNPs in Au/Fe3+ NCs functioned as signal enhancers, significantly increasing the Raman signal via the metathesis reaction product of Prussian blue and obviously improving the detection sensitivity. We combined the novel Au/Fe3+ NCs with antibody-modified magnetic nanoparticles to create a biosensor capable of sensitive detection of E. coli O157:H7, which showed a good linear response (101 to 106 cfu/mL), high detection sensitivity (2 cfu/mL), and good recovery rate (93.60–97.50%) in spiked food samples. These results make the biosensor well-suited for food safety monitoring. This strategy achieves the goal of sensitive and quantitative detection of E. coli O157:H7.

scholarly journals Ag@BiOCl super-hydrophobic nanostructure for enhancing SERS detection sensitivity

RSC Advances ◽  
2020 ◽  
Vol 10 (20) ◽  
pp. 11865-11870 ◽  
Author(s):  
Huimin Feng ◽  
Fengyou Yang ◽  
Jianjie Dong ◽  
Qian Liu
Keyword(s):  
Hydrophobic Surface ◽  
Detection Sensitivity ◽  
Large Area ◽  
Sers Detection

This large-area hierarchical Ag@BiOCl NSs SERS chip with a super-hydrophobic surface offers a great advantage in further enhancing SERS detection sensitivity.

scholarly journals A Versatile SERS Sensor for Multiple Determinations of Polycyclic Aromatic Hydrocarbons and Its Application Potential in Analysis of Fried Foods

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Shi Wang ◽  
Jie Cheng ◽  
Caiqin Han ◽  
Jianchun Xie
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Sample Pretreatment ◽  
Detection Sensitivity ◽  
Sers Detection ◽  
Layer Effect ◽  
Polycyclic Aromatic ◽  
Fried Foods ◽  
Application Potential ◽  
Binary Linear Regression

Polycyclic aromatic hydrocarbons (PAHs), due to their high hydrophobicity, have low affinity for metallic SERS-active surfaces, which leads to their low SERS detection sensitivity. Various functional groups have been used to improve the affinity of metallic substrates towards the target PAHs. However, a large portion of the signals generated from the “first-layer effect” of the functionalized substrates may complicate the spectrum, leading to a distortion in the assignment of the intrinsic SERS fingerprints of PAHs. In this study, a SERS sensor composed of Au nanoparticles (AuNPs) and reoxidized graphene oxide (rGO) was developed for the simultaneous determination of 16 EPA priority PAHs. The synthesis of the rGO/AuNP substrate can be realized without a complicated modification process. All the 16 PAHs could be identified based on their characteristic peaks in the presence of the composited substrate, with estimated LOD as low as 0.2–2 ng·mL−1. The binary linear regression was optimized as the fitting model for all PAHs except for benzo(k)fluoranthene, with the linear correlation coefficient ranging from 0.9889 to 0.9997. Based on the developed SERS substrates and sample pretreatment, the characteristic SERS peaks of four PAHs in Chinese traditional fried food (youtiao) were identified without any background interference. The whole detection process only takes approximately 15 minutes. The results demonstrate the potential of the multicomponent on-field detection of PAHs.

Sign in / Sign up

Export Citation Format

Share Document