Journal
IEEE SENSORS JOURNAL
Volume 11, Issue 6, Pages 1395-1402Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2010.2093881
Keywords
Fiber-optic sensor; photoacoustics (PAs); refractive index; spinel ferrites
Funding
- University Grants Commission (UGC)-University with Potential for Excellence (UPE)
- Departmental Research Support (DRS)
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Undoped and Mn-doped cobalt ferrite (CoFe2O4) nanoparticles were synthesized and characterized for thermal conductivity and magnetic properties. Room temperature ferromagnetism and an increase in saturation magnetization due to Mn doping (65.4 emu/g for 3 at.% of Mn and 20.8 emu/g for undoped CoFe2O4 nanoparticles) are observed. The ethanol gas sensitivity of undoped and Mn-doped (3 at.%) CoFe2O4 nanoparticles were experimented at ambient temperature using optical fiber based on clad-modified method. By modifying the clad exposure to gas vapor, the sensitivities were estimated to be 7 and 12 counts/100 ppm for undoped and Mn-doped CoFe2O4 nanoparticles, respectively, showing significant enhancement in ethanol gas sensitivity.
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