Zinc Phthalocyanine Nanowires based Flexible Sensor For Room Temperature Cl-2 Detection

Abstract

We have fabricated highly sensitive and Cl-2 selective flexible sensor by depositing solution processed zinc phthalocyanine nanowires onto the flexible PET substrate and studied its Cl-2 sensing characteristics in Cl-2 concentration range 5-1500 ppb. The flexible sensor has a minimum detection limit as low as 5 ppb of Cl, and response as high as 550% within 10 seconds. Interestingly, the sensor exhibited enhanced and faster response kinetics under bending conditions. The gas sensing mechanism of sensor has been discussed on the basis of XPS and Raman spectroscopic studies which revealed that zinc ions were the preferred sites for Cl-2 interactions