Sensor with combined plasmonic and magnetic activities

• Published in: Biosensors and bioelectronics. X Vol. 19; p. 100506
• Main Authors: Sapkota, Raju, Isik, Sadna, Suyanto, Hery, Rupiasih, Ni Nyoman, Ingles, Nahara, Rizal, Conrad
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2024; Elsevier
• Subjects: Kerr effect; Magneto-optics; Magneto-plasmonics; Real-time detection; Sensor technology; Kerr effect; Sensor technology; Real-time detection; Magneto-optics; Magneto-plasmonics
• ISSN: 2590-1370; 2590-1370
• DOI: 10.1016/j.biosx.2024.100506

Sensors utilizing magneto-optical surface plasmon resonance are gaining increasing scientific and practical attention to detect atmospheric gases and humidity. The magneto-optic surface plasmon resonance wavelength is defined by the plasmonic structure's geometry and structure, making it immune to electromagnetic interference outside its resonance frequency range. The present study investigates their application for the detection of atmospheric gases including humidity. In contrast to conventional sensors, magneto-optic sensors exhibited excellent performance in terms of sensitivity (10 times greater), higher quality factor (up to 76 times higher) and design simplicity in terms of layer thickness optimization, integration, and robustness. These results suggest significant potential for utilization of magneto-optic sensors across multiple industries. •High quality factor and sensitivity: MOSPR sensors boost gas and humidity detection.•Enhanced performance: Outperforming SPR sensors in sensitivity, flexibility, and electromagnetic interference tolerance.•Media Analysis: Study examines factors affecting MOSPR sensor performance, offering insights for liquid and gas detection.•Precision: MOSPR sensitivity surpasses existing SPR sensors by several orders of magnitude, enabling precise parameter detection.•Future Targets: Focus on enhancing sensor sensitivity, detection limit, and selectivity.