TY - JOUR
T1 - Role of ruthenium in the dielectric, magnetic properties of nickel ferrite (Ru-NiFe2O4) nanoparticles and their application in hydrogen sensors
AU - Manikandan, Venkatraman
AU - Mirzaei, Ali
AU - Vigneselvan, Sivasubramaniam
AU - Kavita, Srikanti
AU - Mane, Rajaram Sakharam
AU - Kim, Sang Sub
AU - Chandrasekaran, Joseph
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/7/31
Y1 - 2019/7/31
N2 - In this work, Ru-doped nickel ferrites (NiFe2O4) were synthesized by a chemical co-precipitation method. Subsequently, they were annealed at different temperatures. The crystallinity of the samples was evaluated using X-ray diffraction and the morphology of the samples was investigated by scanning electron microscopy and transmission electron microscopy. Dielectric constants and dielectric loss were studied. Ru-doped nickel ferrite samples showed relatively low dielectric constant and loss. Also, the dielectric constant and loss decreased with increasing annealing temperature. Vibrational sample magnetometer analysis shows the hysteresis loop of a soft magnetic nature and the relevant parameters (Mr, Ms and Hc) have low values that confirmed the nature of the material. Subsequently, gas sensors were fabricated to study hydrogen-sensing properties. The gas sensors showed a response to hydrogen gas at a low temperature (100 °C) with selective response in the presence of NH3 and C2H5OH gases. The reasons for electrical, magnetic, and sensing behavior of the samples were discussed in detail.
AB - In this work, Ru-doped nickel ferrites (NiFe2O4) were synthesized by a chemical co-precipitation method. Subsequently, they were annealed at different temperatures. The crystallinity of the samples was evaluated using X-ray diffraction and the morphology of the samples was investigated by scanning electron microscopy and transmission electron microscopy. Dielectric constants and dielectric loss were studied. Ru-doped nickel ferrite samples showed relatively low dielectric constant and loss. Also, the dielectric constant and loss decreased with increasing annealing temperature. Vibrational sample magnetometer analysis shows the hysteresis loop of a soft magnetic nature and the relevant parameters (Mr, Ms and Hc) have low values that confirmed the nature of the material. Subsequently, gas sensors were fabricated to study hydrogen-sensing properties. The gas sensors showed a response to hydrogen gas at a low temperature (100 °C) with selective response in the presence of NH3 and C2H5OH gases. The reasons for electrical, magnetic, and sensing behavior of the samples were discussed in detail.
UR - http://www.scopus.com/inward/record.url?scp=85070535695&partnerID=8YFLogxK
U2 - 10.1021/acsomega.9b01562
DO - 10.1021/acsomega.9b01562
M3 - Article
AN - SCOPUS:85070535695
SN - 2470-1343
VL - 4
SP - 12919
EP - 12926
JO - ACS Omega
JF - ACS Omega
IS - 7
ER -