Bismuth-doping Induced Enhanced Humidity Sensing Properties of Spinel NiFe2O4 Nanoparticles

Manjunatha, K and Hsu, T-E and Chiu, H-H and Ho, M-K and Chethan, B and Oliveira, MC and Longo, E and Ribeiro, RAP and Yu, S-L and Cheng, C-L and Nagabhushana, H and Chen, M-C and Wu, SY (2025) Bismuth-doping Induced Enhanced Humidity Sensing Properties of Spinel NiFe2O4 Nanoparticles. In: Sensors and Actuators B: Chemical, 422 .

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Abstract

Bi-doped NiFe2O4 nanoparticles were tested for humidity detection at various RH levels at room temperature. The findings indicated that sensors with higher Bi concentrations, particularly the ones with 20 Bi doping, showed significantly enhanced sensing response�up to 97 , a sixfold increase compared to undoped sensors. This significant improvement suggests that Bi contributes to synergistic effects that boost sensor performance. Density Functional Theory (DFT) calculations support this by showing that Bi introduces acceptor electronic states, heightening electrical responsiveness to moisture. These Bi-doped sensors exhibit quick response times, high accuracy, negligible hysteresis, and impressive stability, making them promising candidates for reliable humidity detection. © 2024 Elsevier B.V.

Item Type:	Journal Article
Publication:	Sensors and Actuators B: Chemical
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to publisher
Keywords:	Nanoparticles, BET analysis; Bi-doped; Bismuth doping; Density-functional-theory; Humidity detection; Humidity sensing; Humidity sensing property; Humidity sensing response; Sensing response; Spinel ferrites, Humidity sensors
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	17 Oct 2024 04:10
Last Modified:	17 Oct 2024 04:10
URI:	http://eprints.iisc.ac.in/id/eprint/86470

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