양자점을 이용한 폭발물 탐지

Abstract

Detection of explosives is desirable since there are approximately 120 million unexploded land mines worldwide. Detection of nitroaromatic compound based on adsorption into polymers has been reported. Chemo-selective polymers on SAW(surface acoustic wave) device, cyclic voltammetry using gold micro-electrode covered with non-volatile electrolyte, and organic polymer has been previously reported to detect TNT vapor. In this study, five CdSe quantum dots of blue, green, yellow, orange and red were synthesized and various wavelengths were obtained according to the reaction temperature. The synthesis of this CdSe quantum dots can be synthesized quickly at once. And we have performed a detection experiment on various explosive materials(PA, TNT, RDX and PETN) using the above CdSe quantum dots. Detection of the CdSe quantum dots for the four explosive materials is represented by the Stern-Volmer constant. As a result, firstly we confirmed that the CdSe quantum dots of this study were 38 times and 27 times better than the previously reported sensitivities of organic chemical chemosensor and Ⅱ-Ⅵ group quantum dots to TNT, respectively. Secondly Stern-Volmer constants for PA, TNT, RDX, and PETN were determined using CdSe quantum dots of blue, green, yellow, orange, and red, respectively. In particular, the Stern-Volmer constants of the CdSe quantum dots for PA RDX and PETN were found for the first time in this study. Finally the detection rate of CdSe quantum dots for explosives was in the order of PA> TNT> PETN> RDX, which means that the detection ability of nitrate aromatic compounds> nitrate ester compounds> nitrate amine compounds.