Abstract
A prototype of a nitro compound vapor and trace detector, which uses the pyrolysis method and a capacitive gas sensor based on the metal–insulator–semiconductor (MIS) structure type Pd–SiO2–Si, was developed and manufactured. It was experimentally established that the detection limit of trinitrotoluene trace for the detector prototype is 1 × 10−9 g, which corresponds to concentration from 10−11 g/cm3 to 10−12 g/cm3. The prototype had a response time of no more than 30 s. The possibility of further improving the characteristics of the prototype detector by reducing the overall dimensions and increasing the sensitivity of the MIS sensors is shown.
Highlights
Modern problems of industrial and civil safety, environmental monitoring and health care are solved by a wide range of technical means, including devices for gas analysis
To solve the problem of the operational detection of explosives including nitroaromatics at critical infrastructure facilities portable detectors based on the method of ion-mobility spectrometry (IMS) are often used
The IMS instruments have high sensitivity in the ppb range, like gas chromatography (GC), and have the ability to operate at atmospheric pressure, a fast response in the order of seconds, and a relatively simple design [4,5,6]
Summary
Modern problems of industrial and civil safety, environmental monitoring and health care are solved by a wide range of technical means, including devices for gas analysis. In previously published works [36,37], the conditions for the detection of vapors and traces of nitro compounds (using the example of TNT) using the pyrolysis method and an MIS sensor with a Pd–SiO2 –Si structure (diameter of the Pd-gate dPd = 3 mm) are detailed, which recorded the Sensors 2020, 20, x FOR PEER REVIEW concentration of gaseous products of the thermal decomposition of nitro compounds. MIS structure.products corresponds to holding a gaseous sample in a responding to aTNT vapor decomposition prototype of a nitro-containing substance detector based on a microelectronic sensor device using the pyrolysis chamber a temperature of 500–550 °C for 1 second. Design and Manufacture of Prototype Nitro Compounds Detector agreement with the theoretical foundations of the thermal decomposition of TNT [3]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
