Abstract
The study demonstrates the fabrication of magnetite (Fe3O4) microspheres (MS) based magneto resistor (MR), for the detection of as low as 10 parts per billion (ppb) nitric oxide (NO) at room temperature. The Fe3O4 MS with a diameter of nearly 430 nm, have been synthesized by a solvothermal method. The MR based gas sensor shows excellent sensitivity, fast response, and high recovery to NO at room temperature. Moreover after the interaction with NO, Fe3O4 MS show an enhanced magnetic moment due to the increase in spin value from Fe 2+ (s = 2) to Fe 3+ (s = 5/2). MR sensor exhibits a limit of detection of 1.69 ppb with the highest sensitivity of 14.43% for the detection of 500 ppb of NO, with a response time of 10 to 20 seconds. The work aims to develop a proof-of-concept for the detection of NO using a simple method, and more effort would be needed to refine the device for a biological application.
| Original language | English |
|---|---|
| Article number | 9127506 |
| Pages (from-to) | 13341-13348 |
| Number of pages | 8 |
| Journal | IEEE Sensors Journal |
| Volume | 20 |
| Issue number | 22 |
| DOIs | |
| State | Published - 15 Nov 2020 |
Bibliographical note
Publisher Copyright:© 2001-2012 IEEE.
Funding
Manuscript received May 18, 2020; revised June 10, 2020; accepted June 17, 2020. Date of publication June 29, 2020; date of current version October 16, 2020. This work was supported in part by the Ministry of Electronics and Information Technology (MeitY), Government of India, under Grant 5(9)/2012-NANO, Vol. II, in part by the Centre for Excellence in Nanoelectronics and Theranostic Devices (CENTD), Indian Institute of Technology (IIT) Guwahati, and in part by the Central Instruments Facility (CIF), IIT Guwahati. The associate editor coordinating the review of this article and approving it for publication was Prof. Boby George. (Corresponding author: Thomas T. Daniel.) Thomas T. Daniel is with the Centre for Nanotechnology (CNT), IIT Guwahati, Guwahati 781039, India (e-mail: [email protected]). This work was supported in part by the Ministry of Electronics and Information Technology (MeitY), Government of India, under Grant 5(9)/2012-NANO, Vol. II, in part by the Centre for Excellence in Nanoelectronics and Theranostic Devices (CENTD), Indian Institute of Technology (IIT) Guwahati, and in part by the Central Instruments Facility (CIF), IIT Guwahati.
| Funders | Funder number |
|---|---|
| IIT Guwahati | |
| Indian Institute of Technology Delhi | |
| Ministry of Electronics and Information technology | 5(9)/2012-NANO |
| Indian Institute of Technology Mandi |
Keywords
- Magnetite microsphere
- magneto resistor
- niric oxide
- sensor