In this paper, we investigate the sensitivity and selectivity of lead sulphide colloidal quantum dots (CQDs) gas sensor. The benefits of CQDs, compared to commercial bulk sensor gas, are a large surface/volume ratio, a lower operating temperature, an easy deposition process and a precise control of dimensions to increase sensor sensitivity. The sensor is based on a chemo-resistive device with an active layer composed by PbS CQDs deposited on interdigitated metal contacts with a ligand exchange treatment. The sensor performance are validated on different gas pollutants (NO 2 , NO, CO 2 and CO) for increasing gas concentrations and times. The sensor shows high selectivity towards NO and NO 2 against CO and CO 2 at room temperature.
Maiolo, L., Bruno, S.A., Lucarini, I., Pecora, A., De Iacovo, A., Colace, L. (2018). Chemo-Resistive Gas Sensors Based on PbS Colloidal Quantum Dots. In Proceedings of IEEE Sensors (pp.1-4). Institute of Electrical and Electronics Engineers Inc. [10.1109/ICSENS.2018.8589724].
Chemo-Resistive Gas Sensors Based on PbS Colloidal Quantum Dots
Maiolo L.;BRUNO, SIMONE ANTONIO;LUCARINI, IVANO;De Iacovo A.;Colace L.
2018-01-01
Abstract
In this paper, we investigate the sensitivity and selectivity of lead sulphide colloidal quantum dots (CQDs) gas sensor. The benefits of CQDs, compared to commercial bulk sensor gas, are a large surface/volume ratio, a lower operating temperature, an easy deposition process and a precise control of dimensions to increase sensor sensitivity. The sensor is based on a chemo-resistive device with an active layer composed by PbS CQDs deposited on interdigitated metal contacts with a ligand exchange treatment. The sensor performance are validated on different gas pollutants (NO 2 , NO, CO 2 and CO) for increasing gas concentrations and times. The sensor shows high selectivity towards NO and NO 2 against CO and CO 2 at room temperature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
