Magnetoelastic Contactless Gas Sensor
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  • Release Date: 2022-11-01
  • remote sensing
  • gas sensor
  • breath analysis
  • magnetoelastic resonance
  • biomarkers
  • diabetes
  • soft magnet
  • polyvinylpyrrolidone
  • nanofiber
  • humidity
Video Introduction

This video is adapted from 10.3390/bios12100871

In the quest for effective gas sensors for breath analysis, magnetoelastic resonance-based gas sensors (MEGSs) are remarkable candidates. Thanks to their intrinsic contactless operation, they can be used as non-invasive and portable devices. However, traditional monitoring techniques are bound to slow detection, which hinders their application to fast bio-related reactions.
Here researchers present a method for real-time monitoring of the resonance frequency, with a proof of concept for real-time monitoring of gaseous biomarkers based on resonance frequency. This method was validated with a MEGS based on a Metglass 2826 MB microribbon with a polyvinylpyrrolidone (PVP) nanofiber electrospun functionalization.
The device provided a low-noise (RMS = 1.7 Hz), fast (< 2 min), and highly reproducible response to humidity (Δf = 46–182 Hz for 17–95% RH), ammonia (Δf = 112 Hz for 40 ppm), and acetone (Δf = 44 Hz for 40 ppm). These analytes are highly important in biomedical applications, particularly ammonia and acetone, which are biomarkers related to diseases such as diabetes. Furthermore, the capability of distinguishing between breath and regular air was demonstrated with real breath measurements. The sensor also exhibited strong resistance to benzene, a common gaseous interferent in breath analysis.
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Peña, A.;  Aguilera, J.D.;  Matatagui, D.; De La Presa, P.; Horrillo, C.;  Hernando, A.; Marín, P. Magnetoelastic Contactless Gas Sensor. Encyclopedia. Available online: (accessed on 17 April 2024).
Peña A,  Aguilera JD,  Matatagui D, De La Presa P, Horrillo C,  Hernando A, et al. Magnetoelastic Contactless Gas Sensor. Encyclopedia. Available at: Accessed April 17, 2024.
Peña, Alvaro, Juan Diego Aguilera, Daniel Matatagui, Patricia De La Presa, Carmen Horrillo, Antonio Hernando, Pilar Marín. "Magnetoelastic Contactless Gas Sensor" Encyclopedia, (accessed April 17, 2024).
Peña, A.,  Aguilera, J.D.,  Matatagui, D., De La Presa, P., Horrillo, C.,  Hernando, A., & Marín, P. (2022, November 01). Magnetoelastic Contactless Gas Sensor. In Encyclopedia.
Peña, Alvaro, et al. "Magnetoelastic Contactless Gas Sensor." Encyclopedia. Web. 01 November, 2022.