Simultaneously Intensified Plasmonic and Charge Transfer Effects in Surface Enhanced Raman Scattering Sensors Using MXene-Blanketed Au Nanoparticles Assembly

2022 ◽  
Author(s):  
Seong Soo Yoo ◽  
Jeong-Won Ho ◽  
Dong-In Shin ◽  
Minjun Kim ◽  
Sung Hwan Hong ◽  
...  
Keyword(s):  
Signal Amplification ◽  
Au Nanoparticles ◽  
Surface Enhanced Raman Spectroscopy ◽  
Plasmonic Resonance ◽  
Transfer Effects ◽  
Surface Plasmonic Resonance ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Surface enhanced Raman spectroscopy (SERS) is an ultrasensitive tool for detecting wide range of analytes. The signal amplification is generally attributed by two different mechanisms of localized surface plasmonic resonance...

scholarly journals Local Surface Plasmonic Resonance, Surface-Enhanced Raman Scattering, Photoluminescence, and Photocatalytic Activity of Hydrothermal Titanate Nanotubes Coated with Ag Nanoparticles

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Pham Thi Thuy ◽  
Vo Cao Minh ◽  
Vo Quang Mai ◽  
Nguyen Tri Tuan ◽  
Pham Van Tuan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Ag Nanoparticles ◽  
Plasmonic Resonance ◽  
Local Surface ◽  
Ag Nps ◽  
Surface Plasmonic Resonance ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Resonance Surface

In this work, we successfully fabricated homogeneous hydrothermal titanate nanotubes (TNTs) coated with Ag nanoparticles (NPs) and elucidated the role of Ag NPs on local surface plasmonic resonance, surface-enhanced Raman scattering, and the enhanced photocatalytic activity of TNT/Ag nanocomposite. The results showed that the photodegradation process reached equilibrium in just ~5 min for the TNT/Ag nanocomposite, which was much shorter than that of the TNT sample (~90 min). TEM micrographs showed that Ag NPs were well dispersed on the walls of the nanotubes. XRD patterns and Raman spectra indicated that the TNTs were in the monoclinic structure of H2Ti3O7. Furthermore, Raman active modes of the TNTs were significantly enhanced in the TNT/Ag sample, which was attributed to surface-enhanced Raman spectroscopy. The enhanced photocatalytic activity of the TNT/Ag sample was explained by UV-vis diffuse reflectance spectroscopy and photoluminescence emission spectroscopy, which showed local surface plasmonic resonance-induced visible light absorption enhancement and effective charge separation, respectively.

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 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.

Surface-Enhanced Raman Scattering Dye-Labeled Au Nanoparticles for Triplexed Detection of Leukemia and Lymphoma Cells and SERS Flow Cytometry

Langmuir ◽  
2013 ◽  
Vol 29 (6) ◽  
pp. 1908-1919 ◽  
Author(s):  
Christina M. MacLaughlin ◽  
Nisa Mullaithilaga ◽  
Guisheng Yang ◽  
Shell Y. Ip ◽  
Chen Wang ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Raman Scattering ◽  
Au Nanoparticles ◽  
Surface Enhanced Raman Scattering ◽  
Lymphoma Cells ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A sensitive SERS assay for detecting proteins and nucleic acids using a triple-helix molecular switch for cascade signal amplification

2014 ◽  
Vol 50 (66) ◽  
pp. 9409-9412 ◽  
Author(s):  
Sujuan Ye ◽  
Yanying Wu ◽  
Wen Zhang ◽  
Na Li ◽  
Bo Tang
Keyword(s):  
Nucleic Acids ◽  
Signal Amplification ◽  
Triple Helix ◽  
Detection System ◽  
Molecular Switch ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Multiple Cycle ◽  
Enhanced Raman Scattering

A sensitive surface-enhanced Raman scattering (SERS) detection system is developed for proteins and nucleic acids based on a triple-helix molecular switch for multiple cycle signal amplification.

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.

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