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 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 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.

scholarly journals Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 21771-21776 ◽  
Author(s):  
Nan Zhao ◽  
Hefu Li ◽  
Cunwei Tian ◽  
Yanru Xie ◽  
Zhenbao Feng ◽  
...  
Keyword(s):  
High Performance ◽  
Direct Detection ◽  
Three Dimensional ◽  
Sers Substrate ◽  
Sers Substrates ◽  
Plasmonic Structures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Performance Surface

Three-dimensional (3D) plasmonic structures have been intensively investigated as high performance surface enhanced Raman scattering (SERS) substrates.

scholarly journals Facile Fabrication of Micro/Nano Hierarchical SERS Sensor via Anisotropic Etching and Electrochemical Treatment for Malachite Green Detection

2019 ◽  
Vol 9 (23) ◽  
pp. 5237
Author(s):  
Chu-Yu Huang ◽  
Chih-Hung Chien
Keyword(s):  
Malachite Green ◽  
Fem Simulation ◽  
High Sensitivity ◽  
Practical Method ◽  
Electrochemical Treatment ◽  
Sers Substrate ◽  
Sers Substrates ◽  
Surface Enhanced Raman ◽  
Nanostructured Gold ◽  
Facile Fabrication

We propose a facile method to produce micro/nano hierarchical surface-enhanced Raman scattering (SERS) active substrates using simple steps and inexpensive costs. The proposed SERS substrate is a silicon pyramid array covered by a nanostructured gold film (AuNS @ SiPA). Through finite element method (FEM) simulation, we showed that many strong local electric field enhancements (hot spots) were formed between the nano-gap of gold nanostructures. In addition, the micron-scale pyramid structure not only increases the sensing surface area of the sensor, but also helps trap light. By combining these micro and nano structures, the proposed micro/nano hierarchical SERS sensor exhibited high sensitivity. Experimental results confirmed that the AuNS @ SiPA substrate has high sensitivity. The SERS signal enhancement factor obtained from the Rhodamine 6G (R6G) probe molecules was as high as 1 × 107 and the SERS substrates were found to be able to detect a very low concentration of 0.01 nM malachite green (MG) solution. Therefore, this study provides a novel and practical method for fabricating SERS substrates that can facilitate the use of SERS in medicine, food safety, and biotechnology.

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.

scholarly journals Simultaneous Thermal Stability and Ultrahigh Sensitivity of Heterojunction SERS Substrates

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 830 ◽  
Author(s):  
Lingwei Ma ◽  
Jinke Wang ◽  
Hanchen Huang ◽  
Zhengjun Zhang ◽  
Xiaogang Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermally Stable ◽  
Capping Layer ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Ultrahigh Sensitivity ◽  
Reorientation Process

This paper reports the design of Ag-Al2O3-Ag heterojunctions based on Ag nanorods (AgNRs) and their applications as thermally stable and ultrasensitive substrates of surface-enhanced Raman scattering (SERS). Specifically, an ultrathin Al2O3 capping layer of 10 nm on top of AgNRs serves to slow down the surface diffusion of Ag at high temperatures. Then, an additional Ag layer on top of the capping layer creates AgNRs-Al2O3-Ag heterojunctions, which lead to giant enhancement of electromagnetic fields within the Al2O3 gap regions that could boost the SERS enhancement. As a result of this design, the SERS substrates are thermally stable up to 200 °C, which has been increased by more than 100 °C compared with bare AgNRs, and their sensitivity is about 400% that of pure AgNRs. This easy yet effective capping approach offers a pathway to fabricate ultrasensitive, thermally stable and easily prepared SERS sensors, and to extend SERS applications for high-temperature detections, such as monitoring in situ the molecule reorientation process upon annealing. Such simultaneous achievement of thermal stability and SERS sensitivity represents a great advance in the design of SERS sensors and will inspire the fabrication of novel hetero-nanostructures.

Large Area Au Decorated Multi-Walled CNTs Film for Surface Enhanced Raman Scattering

2013 ◽  
Vol 562-565 ◽  
pp. 826-831 ◽  
Author(s):  
Jie Zhang ◽  
Yu Lin Chen ◽  
Tuo Fan ◽  
Yong Zhu
Keyword(s):  
Raman Scattering ◽  
Resonance Effect ◽  
Surface Enhanced Raman Scattering ◽  
Fine Tuning ◽  
Sers Substrate ◽  
Large Area ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

We reported on a study upon a Surface-enhanced Raman Scattering (SERS) substrate produced from a large area multi-walled carbon nanotube (MWCNT) films decorated with Au nanoparticles. The morphology and spectrum of the MWCNTs/Au composite structure was characterized with scanning electron microscopy and spectrophotometer. The SERS signals of Rhodamine 6G (R6G) absorbed on the substrate were improved, which could contribute to the enlarged surface area for adsorption of molecules and Localized Plasmon Resonance Effect. The results indicated that it is potential to produce sensitive SERS substrates via further fine-tuning of size, shape of the nanostructure.

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