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  • Electrospun nickel manganite ▫$(NiMn_2O_4)$▫ nanocrystalline fibers for humidity and temperature sensing
    Dojčinović, Milena P. ...
    Nickel manganite nanocrystalline fibers were obtained by electrospinning and subsequent calcination at 400 ◦C. As-spun fibers were characterized by TG/DTA, Scanning Electron Microscopy and FT-IR ... spectroscopy analysis. X-ray diffraction and FT-IR spectroscopy analysis confirmed the formation of nickel manganite with a cubic spinel structure, while N2 physisorption at 77 K enabled determination of the BET specific surface area as 25.3 m2/g and (BJH) mesopore volume as 21.5 m2/g. The material constant (B) of the nanocrystalline nickel manganite fibers applied by drop-casting on test interdigitated electrodes on alumina substrate, dried at room temperature, was determined as 4379 K in the 20–50 ◦C temperature range and a temperature sensitivity of −4.95%/K at room temperature (25 ◦C). The change of impedance with relative humidity was monitored at 25 and 50 ◦C for a relative humidity (RH) change of 40 to 90% in the 42 Hzπ1 MHz frequency range. At 100 Hz and 25 ◦C, the sensitivity of 327.36 ± 80.12 kΩ/%RH was determined, showing that nickel manganite obtained by electrospinning has potential as a multifunctional material for combined humidity and temperature sensing.
    Vir: Sensors [Elektronski vir]. - ISSN 1424-8220 (Vol. 21, iss. 13, [article no.] 4357, Jul. 2021, str. 1-13)
    Vrsta gradiva - e-članek
    Leto - 2021
    Jezik - angleški
    COBISS.SI-ID - 144702467

    Povezava(-e):

    https://www.mdpi.com/1424-8220/21/13/4357
    DOI

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