Study of TNT Sensor Based on Fluorescence Quenching of Conjugated Polymer MEH-PPV
A nitro aromatic explosives sensor based on fluorescence quenching was studied in this paper. U-shaped plastic optical fiber was used as sensor head and light emitting conjugated polymer MEH-PPV as fluorescence indictor. The light source was modulated sinusoidal to eliminate the external light disturbance. TNT quenching characteristics of fluorescence intensity were measured; When TNT concentration was lower than 10mg/ml, the relationship between fluorescence intensity and TNT concentration was linearly, when TNT concentration was higher than 10mg/100ml the obtained characteristics showed deviation from linear relation described by Stern-Volmer equation.
F. H. Chu et al., "Study of TNT Sensor Based on Fluorescence Quenching of Conjugated Polymer MEH-PPV", Applied Mechanics and Materials, Vols. 58-60, pp. 2688-2692, 2011