REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

ADSORPTION-DESORPTION PROCESSES IN DEFENSE AGAINST CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR AND EXPLOSIVE THREATS

OLGA JAKŠIĆ

Center of Microelectronic Technologies and Single Crystals, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia, olga@nanosys.ihtm.bg.ac.rs

ZORAN JAKŠIĆ

DANIJELA RANDJELOVIĆ

IVANA JOKIĆ

MILOŠ FRANTLOVIĆ

Center of Microelectronic Technologies and Single Crystals, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia

Abstract: Chemical, biological, radiological, nuclear and explosive (CBRNe) agents may be encountered by military personnel on a variety of occasions, during intentional attacks or accidental exposure. Thus personal protection kits should include devices that recognize or rule out the presence of dangerous gases, vapors, airborne droplets or solid particles. Alerting, protection, avoidance and mitigation of CBRNe contamination are of prime interest in anti-terrorist measures. Another situation of interest is the detection of trace amounts of general hazardous materials. The interaction of CBRNe with materials mostly proceeds via adsorption-desorption (AD) that is omnipresent, taking place wherever agent encounters a surface, where it can stay adsorbed for some time and desorb afterwards. AD processes are thus often the fundamental principle of operation of various components (multi/mono analyte sensors, indicators, filters…) designed for a variety of purposes (preventive, protective, decontamination). Structures are basically the same but with appropriate modifications. This paper presents our analysis of adsorption-desorption from the design and optimization point of view (the influence of effective surface area, surface material, functionalization, self-cleaning, reusability...). A comparative analysis is given from the applicative point of view for different structures. The case of chemical, biochemical and biological sensors based on surface plasmon resonance is investigated.

Key words: adsorption, chemical sensing, plasmonic sensors, CBRNe agents.