scholarly journals Highly ordered arrays of hat-shaped hierarchical nanostructures with different curvatures for sensitive SERS and plasmon-driven catalysis

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chao Zhang ◽  
Zhaoxiang Li ◽  
Si Qiu ◽  
Weixi Lu ◽  
Mingrui Shao ◽  
...  
Keyword(s):  
Hot Spots ◽  
Hybrid Structure ◽  
Sers Substrate ◽  
Polystyrene Spheres ◽  
Hierarchical Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Narrow Gaps

Abstract Regulation of hot spots exhibits excellent potential in many applications including nanolasers, energy harvesting, sensing, and subwavelength imaging. Here, hat-shaped hierarchical nanostructures with different space curvatures have been proposed to enhance hot spots for facilitating surface-enhanced Raman scattering (SERS) and plasmon-driven catalysis applications. These novel nanostructures comprise two layers of metal nanoparticles separated by hat-shaped MoS2 films. The fabrication of this hybrid structure is based on the thermal annealing and thermal evaporation of self-assembled polystyrene spheres, which are convenient to control the metal particle size and the curvature of hat-shaped nanostructures. Based on the narrow gaps produced by the MoS2 films and the curvature of space, the constructed platform exhibits superior SERS capability and achieves ultrasensitive detection for toxic molecules. Furthermore, the surface catalytic conversion of p-nitrothiophenol (PNTP) to p, p′-dimercaptobenzene (DMAB) was in situ monitored by the SERS substrate. The mechanism governing this regulation of hot spots is also investigated via theoretical simulations.

An in situ approach for facile fabrication of robust and scalable SERS substrates

Nanoscale ◽  
2014 ◽  
Vol 6 (13) ◽  
pp. 7232-7236 ◽  
Author(s):  
Yi-Chung Wang ◽  
Joseph S. DuChene ◽  
Fengwei Huo ◽  
Wei David Wei
Keyword(s):  
High Sensitivity ◽  
Sers Substrate ◽  
Biological Detection ◽  
Sers Substrates ◽  
Widespread Implementation ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Facile Fabrication ◽  
Enhanced Raman Scattering

The widespread implementation of surface enhanced Raman scattering (SERS) techniques for chemical and biological detection requires an inexpensive, yet robust SERS substrate with high sensitivity and reproducibility.

Electrospun flexible poly(bisphenol A carbonate) nanofibers decorated with Ag nanoparticles as effective 3D SERS substrates for trace TNT detection

The Analyst ◽  
2017 ◽  
Vol 142 (24) ◽  
pp. 4756-4764 ◽  
Author(s):  
Yi Li ◽  
Rui Lu ◽  
Jinyou Shen ◽  
Weiqing Han ◽  
Xiuyun Sun ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Ag Nanoparticles ◽  
Chemical Reduction ◽  
Sers Substrate ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Tnt Detection

A flexible 3D hybrid PC/Ag surface-enhanced Raman scattering (SERS) substrate was fabricated through the combination of electrospinning and in situ chemical reduction.

scholarly journals Facile In Situ Photochemical Synthesis of Silver Nanoaggregates for Surface-Enhanced Raman Scattering Applications

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 685 ◽  
Author(s):  
Zhen Yin ◽  
Huilin He ◽  
Zhenming Wang ◽  
Xiaoguo Fang ◽  
Chunxiang Xu ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Microfluidic Channel ◽  
Surface Enhanced Raman Scattering ◽  
Photochemical Synthesis ◽  
Sers Substrate ◽  
Relative Standard ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Recently, photochemical synthesis has attracted wide interest on in situ preparing the surface-enhanced Raman scattering (SERS) substrate with excellent performance, especially in a compact space and microfluidic channel. Herein, a facile, green and cost-effective approach to in situ photochemically synthesize silver nanoaggregates is demonstrated for SERS applications. By adjusting the photo-irradiation conditions, the morphologies and sizes of the silver nanoaggregates can be deliberately tailored. The synthesized silver nanoaggregates-based substrates exhibit a highly sensitive and reproducible SERS activity with a low detection limit of 10−8 M for 4-Aminothiophenol detection and relative standard deviation of 12.3%, paving an efficient and promising route for in situ SERS-based rapid detection in the environmental monitoring and food quality control.

Bacteria encapsulation and rapid antibiotic susceptibility test using a microfluidic microwell device integrating surface-enhanced Raman scattering

Lab on a Chip ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 2520-2528 ◽  
Author(s):  
Hsiu-Kang Huang ◽  
Ho-Wen Cheng ◽  
Cheng-Chieh Liao ◽  
Shang-Jyun Lin ◽  
Yi-Zih Chen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
High Throughput ◽  
Antibiotic Susceptibility ◽  
Susceptibility Test ◽  
Sers Substrate ◽  
Antibiotic Susceptibility Test ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

We developed a microfluidic microwell device integrating SERS substrate for an efficient bacteria encapsulation and enrichment followed by in situ SERS-AST measurement, which can potentially apply for high throughput and multi-parallel AST.

Hybrid octahedral Au nanocrystals and Ag nanohole arrays as substrates for highly sensitive and reproducible surface-enhanced Raman scattering

2020 ◽  
Vol 8 (3) ◽  
pp. 1135-1142
Author(s):  
Tiancheng Gong ◽  
Yunfei Luo ◽  
Haibin Zhang ◽  
Chengwei Zhao ◽  
Weisheng Yue ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Hybrid Structure ◽  
Sers Substrate ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Nanohole Arrays ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

A 3D SERS substrate with a hybrid structure of octahedral AuNCs and AgNHs exhibits high enhancement and reproducibility.

scholarly journals Synthesis of Gold Nanoparticle Stabilized on Silicon Nanocrystal Containing Polymer Microspheres as Effective Surface-Enhanced Raman Scattering (SERS) Substrates

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1501
Author(s):  
Guixian Zhu ◽  
Lin Cheng ◽  
Gannan Liu ◽  
Lianqing Zhu
Keyword(s):  
Raman Scattering ◽  
Metal Nanoparticles ◽  
Hot Spots ◽  
Sers Substrate ◽  
Silicon Nanocrystal ◽  
Biological Detection ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Developing ideal surface-enhanced Raman scattering (SERS) substrates is significant in biological detection. Compared with free non-aggregated noble metal nanoparticles, loading metal nanoparticles on a large matrix can achieve a higher SERS effect due to the existence of many “hot spots”. A novel SERS substrate with intense “hot spots” was prepared through reducing gold ions with silicon nanocrystal containing polymer microspheres. The substrate exhibits high SERS sensitivity with an enhancement factor of 5.4 × 107. By applying 4-mercaptopyridine as a Raman reporter, the developed SERS substrate can realize measurement of pH values. The intensity ratio of 1574 to 1607 cm−1 of 4-mercaptopyridine showed excellent pH sensitivity, which increased as the surrounding pH increased. With good stability and reliability, the pH sensor is promising in the design of biological detection devices.

scholarly journals Flexible SERS substrate of silver nanoparticles on cotton swabs for rapid in-situ detection of melamine

2022 ◽  
Author(s):  
Wen-Chien Huang ◽  
Ken-Fa Cheng ◽  
Jing-Yuan Shyu
Keyword(s):  
Silver Nanoparticles ◽  
Food Safety ◽  
Raman Scattering ◽  
Sers Substrate ◽  
Fast Method ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
In Situ Detection

It is important to be able to detect melamine via a sensitive and fast method in the field of food safety. Surface-enhanced Raman scattering (SERS) has attracted much attention due...

In-Situ Detection of Fluid Media Based on Three-Dimensional Dendritic Silver Surface-Enhanced Raman Scattering Substrate

2022 ◽  
Author(s):  
Sha Li ◽  
Zezhou Wang ◽  
Yunpeng Shao ◽  
Kai Zhang ◽  
Linyu Mei ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Three Dimensional ◽  
Microfluidic Channel ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Silver Surface ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In this paper, a highly active surface enhanced Raman scattering (SERS) substrate based on three-dimensional (3D) dendritic silver nanostructure was constructed in microfluidic channel by one-step electrodisplacement reaction for in-situ...

scholarly journals In situ preparation of Ag nanoparticles on silicon wafer as highly sensitive SERS substrate

RSC Advances ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 2887-2891 ◽  
Author(s):  
Xinglong Tu ◽  
Zheng Li ◽  
Jing Lu ◽  
Yanpeng Zhang ◽  
Guilin Yin ◽  
...  
Keyword(s):  
Silicon Wafer ◽  
Ag Nanoparticles ◽  
Sers Substrate ◽  
Surface Modifier ◽  
In Situ Preparation ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

An intensive surface enhanced Raman scattering (SERS) effect is realized by ordered Ag nanoparticles (NPs) in situ grown on silicon wafer directly using (3-aminopropyl) trimethoxysilane (APS) as both the surface modifier and reducing agent.

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