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.

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.

Sign in / Sign up

Export Citation Format

Share Document