Wide range temperature detection with hybrid nanoparticles traced by surface-enhanced Raman scattering

2013 ◽  
Vol 57 (3) ◽  
pp. 417-425 ◽  
Author(s):  
Jun Yin ◽  
YaGuang He ◽  
Wei Li ◽  
ZongQuan Wu ◽  
YunSheng Ding
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Hybrid Nanoparticles ◽  
Temperature Detection ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals Surface-Enhanced Raman Scattering-Based Lateral-Flow Immunoassay

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2228
Author(s):  
Boris Khlebtsov ◽  
Nikolai Khlebtsov
Keyword(s):  
Raman Scattering ◽  
Point Of Care ◽  
Surface Enhanced Raman Scattering ◽  
Environmental Safety ◽  
Lateral Flow ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Low Sensitivity

Lateral flow immunoassays (LFIAs) have been developed and used in a wide range of applications, in point-of-care disease diagnoses, environmental safety, and food control. However, in its classical version, it has low sensitivity and can only perform semiquantitative detection, based on colorimetric signals. Over the past decade, surface-enhanced Raman scattering (SERS) tags have been developed in order to decrease the detection limit and enable the quantitative analysis of analytes. Of note, these tags needed new readout systems and signal processing algorithms, while the LFIA design remained unchanged. This review highlights SERS strategies of signal enhancement for LFIAs. The types of labels used, the possible gain in sensitivity from their use, methods of reading and processing the signal, and the prospects for use are discussed.

Surface-Enhanced Raman Scattering: A Technique of Choice for Molecular Detection

2013 ◽  
Vol 754 ◽  
pp. 143-169 ◽  
Author(s):  
Mohammad Kamal Hossain
Keyword(s):  
Raman Scattering ◽  
Cost Effective ◽  
Surface Enhanced Raman Scattering ◽  
Localized Surface Plasmon ◽  
Raman Signal ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Effective Development

Although surface-enhanced Raman scattering (SERS) has crossed its infancy long ago, it is yet to persuade different challenges to make it available in day-to-day applications. SERS is being criticized mainly due to the quality of the SERS analyses that uses substrates to get the giant enhancement for respective Raman signal of the target molecule. Hence, understanding the phenomena behind substrates, cost-effective development and optimization of such substrates for routine analytical purposes and utilization of modern modalities to get the insights out has become a very wide-spreading and interesting area of research. In this piece of work, several key terminologies related to SERS have been presented in brief. Since SERS is a localized surface plasmon resonance (LSPR) mediated signal-enhancing phenomena, it is indispensable to understand the correlation between LSPR excitations originated from substrate and SERS signal originated from molecules. A wide range of SERS-active substrates including scattered nanoaggregates, anisotropic assembly, two-dimensional nanostructure, multi-layered nanostructure of gold nanoparticles and colloidal approach have been used to interpret such correlation between LSPR excitations and SERS characteristics. Few exemplary applications of SERS have been also mentioned followed by typical simulative work how nanoobject behaves at different excitations and polarizations.

scholarly journals Magnetic Fe3O4/Ag Hybrid Nanoparticles as Surface-Enhanced Raman Scattering Substrate for Trace Analysis of Furazolidone in Fish Feeds

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Wansong Yu ◽  
Yiqun Huang ◽  
Lu Pei ◽  
Yuxia Fan ◽  
Xiaohui Wang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Trace Analysis ◽  
Surface Enhanced Raman Scattering ◽  
Magnetic Activity ◽  
Hybrid Nanoparticles ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Fish Feeds ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Nanoparticles (NPs) composed of ferromagnetic and noble metal materials show dual functions of magnetic activity and local surface plasmon response and have great potential as substrates for surface-enhanced Raman scattering (SERS) in trace analysis. Easy-to-prepare superparamagnetic Fe3O4/Ag hybrid NPs were synthesized and optimized by adjusting the ratio of silver particles aggregated with APTMS-modified Fe3O4NPs. The hybrid NPs were assembled under an external magnetic field before being used as substrate for SERS analysis. The SERS spectral features of furazolidone standard solution were clearly identified at concentrations as low as 40 ng mL−1, and furazolidone in fish feeds could be detected at 500 ng g−1. The results indicated that the Fe3O4/Ag hybrid NPs as SERS substrates had a great potential for detection of trace amount of furazolidone and other prohibited or restricted antibiotics in the animal and fish feeds.

Synthesis of porous Au–Ag alloy nanorods with tunable plasmonic properties and intrinsic hotspots for surface-enhanced Raman scattering

CrystEngComm ◽  
2021 ◽  
Author(s):  
Shanlin Ke ◽  
Caixia Kan ◽  
Xingzhong Zhu ◽  
Changshun Wang ◽  
Xiu Wang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Highly Sensitive ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The tunability of longitudinal plasmonic bands of P-AuAgNRs is realized to cover a wide range of wavelengths. P-AuAgNRs exhibit numerous internal hotspots which favor highly sensitive surface-enhanced Raman scattering detection.

scholarly journals Binary Surfactant–Mediated Tunable Nanotip Growth on Gold Nanoparticles and Applications in Photothermal Catalysis

2021 ◽  
Vol 9 ◽  
Author(s):  
Xiaohu Mi ◽  
Tingting Zhang ◽  
Baobao Zhang ◽  
Min Ji ◽  
Bowen Kang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Au Nanoparticle ◽  
Plasmonic Nanostructures ◽  
Hexadecyltrimethylammonium Bromide ◽  
Strong Light ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Plasmonic nanostructures with sharp tips are widely used for optical signal enhancement because of their strong light-confining abilities. These structures have a wide range of potential applications, for example, in sensing, bioimaging, and surface-enhanced Raman scattering. Au nanoparticles, which are important plasmonic materials with high photothermal conversion efficiencies in the visible to near-infrared region, have contributed greatly to the development of photothermal catalysis. However, the existing methods for synthesizing nanostructures with tips need the assistance of poly(vinylpyrrolidone), thiols, or biomolecules. This greatly hinders signal detection because of stubborn residues. Here, we propose an efficient binary surfactant–mediated method for controlling nanotip growth on Au nanoparticle surfaces. This avoids the effects of surfactants and can be used with other Au nanostructures. The Au architecture tip growth process can be controlled well by adjusting the ratio of hexadecyltrimethylammonium bromide to hexadecyltrimethylammonium chloride. This is due to the different levels of attraction between Br−/Cl− and Au3+ ions. The surface-enhanced Raman scattering and catalytic abilities of the synthesized nanoparticles with tips were evaluated by electromagnetic simulation and photothermal catalysis experiments (with 4-nitrothiophenol). The results show good potential for use in surface-enhanced Raman scattering applications. This method provides a new strategy for designing plasmonic photothermal nanostructures for chemical and biological applications.

Raman Microprobe Analysis of Thin Films Formed on the Surface of Silver Electrical Contacts Utilizing the Surface-Enhanced Raman Scattering Effect

1983 ◽  
Vol 37 (5) ◽  
pp. 450-455 ◽  
Author(s):  
H. Ishida ◽  
A. Ishitani
Keyword(s):  
Thin Films ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Enhancement Effect ◽  
Thin Carbon ◽  
Wide Range ◽  
Surface Enhanced ◽  
Raman Microprobe ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

The laser Raman microprobe has been used in combination with Auger electron spectroscopy for the investigation of thin films formed on the surface of polycrystalline silver relay contacts to illustrate the analytical application of the surface-enhanced Raman scattering (SERS) phenomenon to the evaluation of industrial materials. Raman scattering of thin carbon layers on Ag evaporated films has also been examined in order to confirm the enhancement effect on the Ag surface. From the observed enhanced Raman scattering, carbon and sulfur compounds such as silver sulfate have been identified in the thin films formed on Ag contacts operated repeatedly under several kinds of controlled gas flows. These results demonstrate the possibility of a wide range of application of the SERS effect as an useful analytical method with a high surface sensitivity.

The Fabrication of Ag Nanostructure Array Integrated with Microfluidics for Surface Enhanced Raman Scattering

2011 ◽  
Vol 483 ◽  
pp. 281-286
Author(s):  
Zhao Xin Geng ◽  
Wen Liu ◽  
Xuan Ye Wang ◽  
Xiao Dong Wang ◽  
Zhi Hong Li ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Active Sites ◽  
Large Scale ◽  
Surface Enhanced Raman Scattering ◽  
Sers Substrate ◽  
Wide Range ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Surface-enhanced Raman scattering (SERS) with enormous enhancements has shown great potential in single-molecule detection, however, the fabrication of large-scale, controllable and reproducible substrates with high SERS activity is a major limitation. This paper provides method to create wafer level SERS substrate with tunable nanoparticle sizes and interparticle gaps. Silver films with different thicknesses were deposited by electron beam evaporation (EBE) and annealed at 260 °C for 15min in nitrogen gas. When annealed, the thin Ag films break up under surface tension to form isolated nanoparticle. The nanoparticle size, density, and shape are found to be dependent on the thickness of Ag and the condition of annealing. The selective deposition of Ag nanoparticle on the silicon substrate is applied to create SERS active sites before the integration with a PDMS microfluidic chip which functions as a sample delivery device and a transparent optical window for SERS. Detections of Rhodamine 6G SERS spectra are accomplished by using a 633nm laser with 300W excitation power. The results show that the fabrication protocol of such a SERS substrate is low-cost, easy-fabrication and inexpensive. Therefore, this substrate may anticipate a wide range of applications in SERS-based sensors.

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