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 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 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.

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...

Integrated real-time optofluidic SERS via a liquid-core/liquid-cladding waveguide

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 922-927 ◽  
Author(s):  
Jeongan Choi ◽  
Kang Soo Lee ◽  
Jin Ho Jung ◽  
Hyung Jin Sung ◽  
Sang Soo Kim
Keyword(s):  
Raman Spectroscopy ◽  
Real Time ◽  
Liquid Core ◽  
Three Dimensional ◽  
Surface Enhanced Raman Spectroscopy ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

This paper describes the realization of highly sensitive surface-enhanced Raman spectroscopy (SERS) via an integrated three-dimensional liquid-core/liquid-cladding waveguide.

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.

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