Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdS
In order to develop sensors capable to detect harmful gases at the ambient temperature, the semiconductor heterostructure PbS/CdS has been synthesized. Formation of CdS nanorods was conducted in the presence of ethylenediamine. An ion-exchange method was used to deposit PbS nanoparticles over the Cd...
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Chuiko Institute of Surface Chemistry of NAS of Ukraine
2017-02-01
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| Series: | Хімія, фізика та технологія поверхні |
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| Online Access: | https://cpts.com.ua/index.php/cpts/article/view/418 |
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| author | S. L. Prokopenko G. M. Gunja S. M. Makhno P. P. Gorbyk |
| author_facet | S. L. Prokopenko G. M. Gunja S. M. Makhno P. P. Gorbyk |
| author_sort | S. L. Prokopenko |
| collection | DOAJ |
| description | In order to develop sensors capable to detect harmful gases at the ambient temperature, the semiconductor heterostructure PbS/CdS has been synthesized. Formation of CdS nanorods was conducted in the presence of ethylenediamine. An ion-exchange method was used to deposit PbS nanoparticles over the CdS nanorods to produce a large area of the surface heterojunction. Series of samples of with variation in the PbS amount on the CdS surface (from 2.5 to 20mol.%) was obtained. Surface morphology, optical properties and performance characteristics of the PbS/CdS heterostructure gas sensors were studied. The sample performance characteristics were measured by means of change in electric resistance of sensor due to reaction between the surface of material and NH3 in saturated vapours of ammonia. The gas sensor based on the PbS/CdS heterostructures have shorter response and recovery time compared to a sensor based on the CdS solely. It has been shown that with increase in amount of PbS on the CdS surface from 2.5 to 20mol.% the sensor response rate becomes 1.7 times greater. |
| format | Article |
| id | doaj-art-b922c24afbc046aea9c774d60be6bd3e |
| institution | Kabale University |
| issn | 2079-1704 2518-1238 |
| language | English |
| publishDate | 2017-02-01 |
| publisher | Chuiko Institute of Surface Chemistry of NAS of Ukraine |
| record_format | Article |
| series | Хімія, фізика та технологія поверхні |
| spelling | doaj-art-b922c24afbc046aea9c774d60be6bd3e2025-08-20T03:31:24ZengChuiko Institute of Surface Chemistry of NAS of UkraineХімія, фізика та технологія поверхні2079-17042518-12382017-02-018110.15407/hftp08.01.098Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdSS. L. Prokopenko0G. M. Gunja1S. M. Makhno2P. P. Gorbyk3Chuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineChuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineChuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineChuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineIn order to develop sensors capable to detect harmful gases at the ambient temperature, the semiconductor heterostructure PbS/CdS has been synthesized. Formation of CdS nanorods was conducted in the presence of ethylenediamine. An ion-exchange method was used to deposit PbS nanoparticles over the CdS nanorods to produce a large area of the surface heterojunction. Series of samples of with variation in the PbS amount on the CdS surface (from 2.5 to 20mol.%) was obtained. Surface morphology, optical properties and performance characteristics of the PbS/CdS heterostructure gas sensors were studied. The sample performance characteristics were measured by means of change in electric resistance of sensor due to reaction between the surface of material and NH3 in saturated vapours of ammonia. The gas sensor based on the PbS/CdS heterostructures have shorter response and recovery time compared to a sensor based on the CdS solely. It has been shown that with increase in amount of PbS on the CdS surface from 2.5 to 20mol.% the sensor response rate becomes 1.7 times greater.https://cpts.com.ua/index.php/cpts/article/view/418sensorPbS/CdS heterostructuresammoniananowires |
| spellingShingle | S. L. Prokopenko G. M. Gunja S. M. Makhno P. P. Gorbyk Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdS Хімія, фізика та технологія поверхні sensor PbS/CdS heterostructures ammonia nanowires |
| title | Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdS |
| title_full | Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdS |
| title_fullStr | Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdS |
| title_full_unstemmed | Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdS |
| title_short | Room-temperature NH<sub>3</sub> gas sensors based on heterostructures PbS/CdS |
| title_sort | room temperature nh sub 3 sub gas sensors based on heterostructures pbs cds |
| topic | sensor PbS/CdS heterostructures ammonia nanowires |
| url | https://cpts.com.ua/index.php/cpts/article/view/418 |
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