Resistive NOx dosimeter to detect very low NOx concentrations—Proof-of-principle and comparison with classical sensing devices
| Autor: | Isabella Marr, Ralf Moos |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
Resistive touchscreen Dosimeter Chemistry 010401 analytical chemistry Metals and Alloys Analytical chemistry 02 engineering and technology respiratory system 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Storage material Air quality monitoring Proof of concept cardiovascular system Materials Chemistry Electrical and Electronic Engineering 0210 nano-technology Instrumentation NOx circulatory and respiratory physiology |
| Zdroj: | Sensors and Actuators B: Chemical. 248:848-855 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2016.12.112 |
| Popis: | Increasingly stringent emission and immission legislations for oxides of nitrogen demand a reliable air quality monitoring. Sensing devices following the resistive gas dosimeter principle may be an option for reliable long-term detection of toxic and harmful analyte gases like NOx. The presented resistive NOx dosimeter meets these requirements. During NOx exposure, a NOx storage material (potassium and manganese oxides on γ-alumina) adsorbs selectively NOx and changes its resistance, with a resistance change being proportional to the amount of adsorbed NOx, which is proportional to mean concentration average over time, i.e., it measures the NOx dose. Since the time derivative of the resistance change is proportional to the actual NOx concentration it can be also used as a NOx sensor. Besides a proof-of-principle, this work also compares the resistive NOx dosimeter with commercially available semiconducting and electrochemical NO2 gas sensors. |
| Databáze: | OpenAIRE |
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