Abstract
The demand of continuous detection technology for gas phase trace explosives (GPTE) in explosion-proof stability maintenance, public security, explosive security storage and other occasions is summarized. By studying the development status and research trends of surface enhanced Raman scattering (SERS) detection technology to detect GPTE, an application of a double enhanced Raman scattering (DERS) substrate consisted of a novel 1D composite silver grating and gold nanospheres colloids in the GPTE detection was presented. The detection sensitivity of 2,4,6-trinitrotoluene (TNT) and cyclotrimethyltrinitroamine (RDX) was 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-11</sup> mol/L. Combining with microfluidic technology, it can realize in-situ and continuous GPTE detection. This DERS substrate has a significant reference for the application of SERS detection technology in food safety, health care and environmental monitoring, et al.
Highlights
INTRODUCTIONWith the increasingly rampant global terrorist activities and the gradual intensification of local regional conflicts, a large number of hidden explosives, such as time bombs, landmines and other forms of explosive devices, are threatened in the process of peacekeeping, stability maintenance and riot handling
In recent years, with the increasingly rampant global terrorist activities and the gradual intensification of local regional conflicts, a large number of hidden explosives, such as time bombs, landmines and other forms of explosive devices, are threatened in the process of peacekeeping, stability maintenance and riot handling.it is necessary to search and locate these hidden explosives
A kind of continuous detection double enhanced Raman scattering (DERS) substrate combined with microfluidic technology is proposed
Summary
With the increasingly rampant global terrorist activities and the gradual intensification of local regional conflicts, a large number of hidden explosives, such as time bombs, landmines and other forms of explosive devices, are threatened in the process of peacekeeping, stability maintenance and riot handling. Traditional trace explosive detection technology mainly includes spectroscopic technology, chemical reaction sensor technology and biosensor technology. These technologies have problems such as large equipment quality and volume, inability to continuously repeat sampling, poor environmental adaptability, low selectivity, and environmental pollution [4-11]. The key to realize SERS detection of trace explosives was to study a SERS substrate with simple preparation process, good reproducibility and continuous detection. The substrate has the characteristics of simple preparation, good reproducibility and continuous detection. Continuous and real-time detection of GPTE can be realized. The GPTE can be continuously sampled to achieve high sensitivity and continuous SERS detection of the DERS substrate for airborne explosive molecules
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