Paper-Based ZnO Oxygen Sensor
| Autor: | Isaac C. Sanchez, Alejandro J. Gimenez, J. M. Yáñez-Limón, Gabriel Luna-Bárcenas |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Photoconductivity chemistry.chemical_element medicine.disease_cause Oxygen chemistry Desorption medicine Optoelectronics Electrical and Electronic Engineering Current (fluid) Absorption (electromagnetic radiation) Porosity business Instrumentation Oxygen sensor Ultraviolet |
| Zdroj: | IEEE Sensors Journal. 15:1246-1251 |
| ISSN: | 2379-9153 1530-437X |
| Popis: | In this paper, we report the development of an oxygen sensor using a simple device made from a film of ZnO crystals dispersed over a paper surface. Due to the high porosity of this kind of device made from paper and ZnO, a large photoconductive effect is observed as result of the fast absorption and desorption of oxygen from the ZnO surface. To detect oxygen, we propose to use ultraviolet (UV) illumination over the photoconductive surface of the sensor, the applied UV light produces oxygen desorption causing current variations through the sensor that are proportional to the oxygen presence nearby the sensor surface. The sensor developed in this paper is attractive because it is remarkably easy to fabricate, employs only very low-cost materials for its construction, and shows a better sensitivity at low concentration of oxygen at partial vacuum environments. |
| Databáze: | OpenAIRE |
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