Solid-State Gas Sensors: Sensor System Challenges in the Civil Security Domain

Materials

Angelika Hackner¹  Sebastian Beer¹  Johann Göbel¹  Gerhard Müller² 

[1] Airbus Group Innovations, Munich D-81663, Germany;Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences, Lothstraße 34, München D-80335, Germany;

关键词: explosives;    drugs;    gas sensor;    electrostatic precipitation;    solid-vapor conversion;    surface ionization;   

DOI  :  10.3390/ma9010065

来源: DOAJ

【 摘 要 】

The detection of military high explosives and illicit drugs presents problems of paramount importance in the fields of counter terrorism and criminal investigation. Effectively dealing with such threats requires hand-portable, mobile and affordable instruments. The paper shows that solid-state gas sensors can contribute to the development of such instruments provided the sensors are incorporated into integrated sensor systems, which acquire the target substances in the form of particle residue from suspect objects and which process the collected residue through a sequence of particle sampling, solid-vapor conversion, vapor detection and signal treatment steps. Considering sensor systems with metal oxide gas sensors at the backend, it is demonstrated that significant gains in sensitivity, selectivity and speed of response can be attained when the threat substances are sampled in particle as opposed to vapor form.

【 授权许可】

Unknown