Related Experiment Video
Updated: Feb 2, 2026

Biofilm Removal Using Carbon Dioxide Aerosols without Nitrogen Purge
Published on: November 6, 2016
V₂O₅ Thin Films as Nitrogen Dioxide Sensors †
Krystyna Schneider1, Wojciech Maziarz2
1AGH University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Department of Electronics, 30-059 Krakow, Poland. kryschna@agh.edu.pl.
Vanadium pentoxide (V₂O₅) thin films show promising gas sensing capabilities for nitrogen dioxide (NO₂). Sensitivity significantly increases above 545 K due to a metal-insulator transition (MIT).
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Vanadium pentoxide (V₂O₅) is a promising material for gas sensing applications.
- Thin film deposition techniques are crucial for developing efficient gas sensors.
- Understanding the influence of material properties on sensor performance is essential.
Purpose of the Study:
- To deposit vanadium pentoxide (V₂O₅) thin films using rf reactive sputtering.
- To investigate the gas sensing properties of V₂O₅ thin films towards nitrogen dioxide (NO₂).
- To explore the effect of metal-insulator transition (MIT) on sensor performance.
Main Methods:
- Radio frequency (rf) reactive sputtering for V₂O₅ thin film deposition.
- Glancing incidence X-ray diffraction (GIXD) for phase characterization.
- Scanning Electronic Microscopy (SEM) for structural analysis.
- Profilometry for film thickness measurement.
- Gas sensing measurements in the temperature range of 410–617 K with 4–20 ppm NO₂.
Main Results:
- V₂O₅ thin films were successfully deposited and confirmed to be of the V₂O₅ phase.
- The films exhibited good response and reversibility to nitrogen dioxide (NO₂).
- A significant increase in sensor sensitivity was observed above 545 K, linked to a metal-insulator transition (MIT).
Conclusions:
- V₂O₅ thin films are effective gas sensors for NO₂.
- The metal-insulator transition (MIT) at approximately 545 K enhances sensor sensitivity.
- This study highlights the potential of V₂O₅ for high-performance gas sensing applications.
More Related Videos
07:17Measurement of Dynamic Force Acted on Water Strider Leg Jumping Upward by the PVDF Film Sensor
Published on: August 3, 2018
09:15Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors
Published on: November 22, 2016
Related Concept Videos
The Nitrogen Cycle
Overview of Nitrogen Metabolism
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
Carbon-dioxide Fixation
Inorganic Nitrogen Assimilation
Carbon Dioxide Transport in the Blood
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...
Chirality at Nitrogen, Phosphorus, and Sulfur
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...