scholarly journals Ag Nanoparticle-Decorated Cu2S Nanosheets for Surface Enhanced Raman Spectroscopy Detection and Photocatalytic Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2508
Author(s):  
Osama Nasr ◽  
Jian-Ru Jiang ◽  
Wen-Shuo Chuang ◽  
Sheng-Wei Lee ◽  
Chih-Yen Chen
Keyword(s):  
Reduction Method ◽  
Organic Pollutant ◽  
Surface Enhanced Raman Spectroscopy ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering ◽  
New Generation ◽  
Photocatalytic Applications

In this article, we demonstrate a facile, rapid, and practical approach to growing high-quality Cu2S nanosheets decorated with Ag nanoparticles (NPs) through the galvanic reduction method. The Ag/Cu2S nanosheets were efficiently applied to the surface-enhanced Raman scattering (SERS) and photocatalytic degradation applications. The photodegradation of RhB dye with the Ag/Cu2S nanosheets composites occurred at a rate of 2.9 times faster than that observed with the undecorated Cu2S nanosheets. Furthermore, the Ag/Cu2S nanosheets displayed highly sensitive SERS detection of organic pollutant (R6G) as low as 10−9 M. The reproducibility experiments indicated that the Ag/Cu2S nanosheets composites could be used for dual functionality in a new generation of outstandingly sensitive SERS probes for detection and stable photocatalysts.

Simultaneous extraction and surface enhanced Raman spectroscopy detection for rapid and reliable identification of nicotine release of snus products

2021 ◽  
Author(s):  
Yongfeng Tian ◽  
Xianghu Tang ◽  
Ya-Ning Fu ◽  
Shanzhai Shang ◽  
Gaofeng Dong ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Structural Information ◽  
Surface Enhanced Raman Spectroscopy ◽  
Simultaneous Extraction ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Target Molecules ◽  
Unique Chemical

Surface enhanced Raman spectroscopy (SERS) is a highly sensitive analytical detection technique that provides unique chemical and structural information on target molecules. Here, simultaneous extraction and SERS detection of nicotine...

A highly sensitive microfluidics system for multiplexed surface-enhanced Raman scattering (SERS) detection based on Ag nanodot arrays

RSC Advances ◽  
2014 ◽  
Vol 4 (97) ◽  
pp. 54434-54440 ◽  
Author(s):  
Gang Chen ◽  
Yuyang Wang ◽  
Hailong Wang ◽  
Ming Cong ◽  
Lei Chen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Low Concentration ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Nanodot Arrays ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering

We present a microfluidics system with Ag nanodot arrays as the enhancement substrate for multiplexed SERS detection of low-concentration mixtures of thiram and adenine.

scholarly journals 3D Hotspot Matrix of Au Nanoparticles on Au Nanostructures with a Spacer Layer of Dithiol Molecules for Highly Sensitive Surface-Enhanced Raman Spectroscopy

2021 ◽  
Author(s):  
Dong-Jin Lee ◽  
Dae Yu Kim
Keyword(s):  
Au Nanoparticles ◽  
Three Dimensional ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Signal ◽  
Large Area ◽  
Spacer Layer ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Abstract Engineering of efficient plasmonic hotspots has been receiving great attention to enhance the sensitivity of surface-enhanced Raman scattering (SERS). In the present study, we propose a highly sensitive SERS platform based on Au nanoparticles (AuNPs) on Au nanostructures (AuNSs) with a spacer layer of 1,4-benzenedimethanethiol (BDMT). The three-dimensional (3D) hotspot matrix has been rationally designed based on the idea of employing 3D hotspots with a vertical nanogap between AuNSs and AuNPs after generating large area two-dimensional hotspots of AuNSs. AuNP@BDMT@AuNSs are fabricated by functionalizing BDMT on AuNSs and then immobilizing AuNPs. The Raman signal of the AuNP@BDMT@AuNSs is approximately twelve times higher than that of AuNSs at 100 nM of rhodamine 6G. The AuNP@BDMT@AuNSs are then employed to detect thiram, which is used as a fungicide, with a detection limit of 13 nM. Our proposed platform thus shows significant potential for use in highly sensitive SERS sensors.

scholarly journals A highly sensitive surface-enhanced Raman scattering substrate prepared on a hydrophobic surface using controlled evaporation

RSC Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 331-337
Author(s):  
Rajeev K. Sinha
Keyword(s):  
Raman Spectroscopy ◽  
Raman Scattering ◽  
Hydrophobic Surface ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In the present work, we report the fabrication of a surface-enhanced Raman spectroscopy (SERS) substrate on a simple and easily fabricable hydrophobic surface.

scholarly journals 3D hotspot matrix of Au nanoparticles on Au island film with a spacer layer of dithiol molecules for highly sensitive surface-enhanced Raman spectroscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dong-Jin Lee ◽  
Dae Yu Kim
Keyword(s):  
Au Nanoparticles ◽  
Three Dimensional ◽  
Surface Enhanced Raman Spectroscopy ◽  
Island Film ◽  
Large Area ◽  
Spacer Layer ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

AbstractEngineering of efficient plasmonic hotspots has been receiving great attention to enhance the sensitivity of surface-enhanced Raman scattering (SERS). In the present study, we propose a highly sensitive SERS platform based on Au nanoparticles (AuNPs) on Au island film (AuIF) with a spacer layer of 1,4-benzenedimethanethiol (BDMT). The three-dimensional (3D) hotspot matrix has been rationally designed based on the idea of employing 3D hotspots with a vertical nanogap between AuIF and AuNPs after generating large area two-dimensional hotspots of AuIF. AuNPs@BDMT@AuIF are fabricated by functionalizing BDMT on AuIF and then immobilizing AuNPs. The SERS performance is investigated with Rhodamine 6G as a probe molecule and the determined enhancement factor is 1.3 × 105. The AuNPs@BDMT@AuIF are then employed to detect thiram, which is used as a fungicide, with a detection limit of 13 nM. Our proposed platform thus shows significant potential for use in highly sensitive SERS sensors.

scholarly journals Hydrophobic multiscale cavities for high-performance and self-cleaning surface-enhanced Raman spectroscopy (SERS) sensing

Nanophotonics ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaofei Zhao ◽  
Chundong Liu ◽  
Jing Yu ◽  
Zhen Li ◽  
Lu Liu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Performance ◽  
Light Trapping ◽  
Organic Pollutant ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrates ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Self Cleaning

AbstractCavity array, with excellent optical capture capability, has received increasing attention for the surface-enhanced Raman spectroscopy (SERS)-active substrates. Here, we proposed molybdenum disulfide (MoS2) nanocavities growing on pyramid Si (PSi) composed of in situ reduced Au nanoparticles (AuNPs), which can form the multiscale cavities (MSCs), and is facile for the couple of the plasmon. We demonstrated that the PSi/MoS2/Au MSCs can serve as highly sensitive, uniform, and stable SERS substrates for rhodamine 6G (R6G), crystal violet, and adenosine triphosphate detection, benefiting from the synergistic effect of the enhanced light trapping and the effective plasmonic couple. The couple of the plasmon in the MSCs is evidently proved by finite-difference time domain simulation, showing the strong electromagnetic field is located around the cavity wall. Moreover, the excellent hydrophobicity of the PSi/MoS2/AuNPs substrate endows it with the ability for the directional monitoring of organic pollutant in a mixture of oil and water. Finally, we demonstrated the MSCs with outstanding photocatalytic performance could achieve the renewable utilization by self-cleaning, which was attributed to the fast electron transfer and effective light absorption. The proposed PSi/MoS2/AuNPs MSC represents a robust mean using the plasmonic metal/semiconductor heterostructure for high-performance SERS sensors and photodegradation.

Multivariate Analysis Aided Surface-Enhanced Raman Spectroscopy (MVA-SERS) Multiplex Quantitative Detection of Trace Fentanyl in Illicit Drug Mixtures Using a Handheld Raman Spectrometer

2021 ◽  
pp. 000370282110329
Author(s):  
Ling Wang ◽  
Mario O. Vendrell-Dones ◽  
Chiara Deriu ◽  
Sevde Doğruer ◽  
Peter de B. Harrington ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Principal Component ◽  
Surface Enhanced Raman Spectroscopy ◽  
Quantitative Detection ◽  
Least Squares Regression ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Current Screening

Recently there has been upsurge in reports that illicit seizures of cocaine and heroin have been adulterated with fentanyl. Surface-enhanced Raman spectroscopy (SERS) provides a useful alternative to current screening procedures that permits detection of trace levels of fentanyl in mixtures. Samples are solubilized and allowed to interact with aggregated colloidal nanostars to produce a rapid and sensitive assay. In this study, we present the quantitative determination of fentanyl in heroin and cocaine using SERS, using a point-and-shoot handheld Raman system. Our protocol is optimized to detect pure fentanyl down to 0.20 ± 0.06 ng/mL and can also distinguish pure cocaine and heroin at ng/mL levels. Multiplex analysis of mixtures is enabled by combining SERS detection with principal component analysis and super partial least squares regression discriminate analysis (SPLS-DA), which allow for the determination of fentanyl as low as 0.05% in simulated seized heroin and 0.10% in simulated seized cocaine samples.

scholarly journals A surface-enhanced Raman scattering-based approach for rapid and highly sensitive quantitative analysis of 3-carboxy-4-methyl-5-propyl-2-furanpropionate and indole-3-acetic acid in saline, human serum and uremic serum of patients with chronic kidney disease

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43489-43496
Author(s):  
Shaghayegh Saadati ◽  
Ubong Eduok ◽  
Amira Abdelrasoul ◽  
Ahmed Shoker
Keyword(s):  
Chronic Kidney Disease ◽  
Acetic Acid ◽  
Quantitative Analysis ◽  
Kidney Disease ◽  
Uremic Serum ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Indole 3 Acetic Acid

Rapid and highly sensitive quantitative analysis of 3-carboxy-4-methyl-5-propyl-2-furanpropionate and indole-3-acetic acid in uremic serum of patients with chronic kidney disease.

Combining vancomycin-modified gold nanorod arrays and colloidal nanoparticles as the sandwich model for discrimination of gram-positive bacteria and their detection via surface-enhanced Raman spectroscopy (SERS)

The Analyst ◽  
2021 ◽  
Author(s):  
Araz Norouz Dizaji ◽  
Nihal Simsek Ozek ◽  
Ferhunde Aysin ◽  
Ayfer Calis ◽  
Asli Yilmaz ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Colloidal Nanoparticles ◽  
Nanorod Arrays ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
Sensor Platform ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

This study reports the development of a highly sensitive antibiotic-based discrimination and sensor platform for the detection of gram-positive bacteria through surface-enhanced Raman spectroscopy (SERS). Herein, the combination of gold...

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