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Humidity Sensing Properties of Hierarchical Fe Doped SnO2 Nanocoral-Like Structures

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Abstract

Present technical paper investigates the humidity sensing properties of Fe doped SnO2 nanocoral (FSNC)-like structures which were achieved by hydrothermal synthesis. The structural properties of FSNC samples were characterized using field emission scanning electron microscopy (Hitachi S–4800), energy-dispersive x-ray spectroscopy and x-ray diffraction (Rigaku Miniflex). FSNC with rod-, spherical-, and rod-shaped tentacles have been achieved using autoclave reactors of size 100 ml, 250 ml and 500 ml, respectively. The average crystallite size of FSNC with rod-, spherical-, and rod-shaped tentacles have been found to be ~ 6.51 nm, 7.26 nm and 4.93 nm, respectively. The sensing properties of the FSNC sensors have been established in a humidity chamber for a range of 20–80% relative humidity. The response/recovery time of sensors for FSNC with rod-, spherical-, and rod-shaped tentacles have been found to be 18/32 s, 25/40 s, and 20/30 s, respectively. The highest sensitivity has been achieved for FSNC with rod-shaped tentacles. The humidity sensing properties of FSNC sensors, such as response/recovery time, stability, hysteresis, and sensitivity have been investigated in detail.

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Acknowledgments

Author JJ is very thankful to the Department of Nanoscience and Technology, Mount Carmel College (Autonomous), Bengaluru, India, for providing lab facilities for synthesis and device fabrication.

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Authors and Affiliations

  1. Department of Physics, Saurashtra University, Rajkot, 360005, India

    Joyce Joseph, V. S. Vadgama, P. S. Solanki & N. A. Shah

  2. Department of Nanoscience and Technology, Mount Carmel College, Bangalore, 560052, India

    N. Pradeep

  3. Human Resource Development Centre, Saurashtra University, Rajkot, 360005, India

    D. D. Pandya

Authors
  1. Joyce Joseph
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  2. N. Pradeep
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  3. V. S. Vadgama
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  4. P. S. Solanki
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  6. D. D. Pandya
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Correspondence to D. D. Pandya.

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Joseph, J., Pradeep, N., Vadgama, V.S. et al. Humidity Sensing Properties of Hierarchical Fe Doped SnO2 Nanocoral-Like Structures. J. Electron. Mater. 50, 3949–3961 (2021). https://doi.org/10.1007/s11664-021-08911-x

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  • DOI: https://doi.org/10.1007/s11664-021-08911-x

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