J. Semicond. > 2015, Volume 36 > Issue 2 > 023002
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SEMICONDUCTOR MATERIALS

Synthesis of metal oxide composite nanosheets and their pressure sensing properties

Muhammad Tariq Saeed Chani1, Sher Bahadar Khan1, 2, Kh. S. Karimov3, 4, M. Abid3, Abdullah M. Asiri1, 2 and Kalsoom Akhtar5

+ Author Affiliations

 Corresponding author: Muhammad Tariq Saeed Chani, E-mail: tariqchani@hotmail.com

DOI: 10.1088/1674-4926/36/2/023002

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Abstract: This study presents the synthesis of metal oxides composite nanosheets (oxides of cobalt, zinc and iron) and their pressure sensing properties. A transducer has been fabricated to directly measure the resistance—pressure and impedance—pressure relationships of pristine nanopowder. At the initial stage, a nanopowder sample of 10 mm diameter and 1 mm height was placed in the transducer and by applying pressure of up to 8.15 kN/m2; the DC resistance and the impedance are reduced by 44% on average. It can be explained by the densification of the samples and a decrease in porosity due to the effect of pressure. It was also observed that the DC resistance increases with time and saturated within 8 min. It is considered that this phenomenon is based on the effect of displacement currents of bound charges. The dependences of the impedance phase (θ) on frequency and pressure have also been investigated.

Key words: nanostructures, oxides, chemical synthesis, optical properties, electron microscopy



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Fig. 1.  Transducer for investigation of the impedance of the powder under pressure.

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Fig. 2.  Morphology of synthesized doped metal oxide composite nanosheets.

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Fig. 3.  EDS spectrum of the synthesized doped metal oxide composite nanosheets.

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Fig. 4.  (a) X-ray diffraction and (b) FTIR spectra of doped metal oxide composite nanosheets.

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Fig. 5.  (a) UV-vis absorption spectrum and (b) energy band gap plot of doped metal oxide composite nanosheets.

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Fig. 6.  (a) DC resistance-pressure relationship and (b) impedance-pressure relationships for the doped metal oxide nano-powder at various frequencies.

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Fig. 7.  DC resistance-time relationship for the pristine doped metal oxide nanopowder at different pressures.

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Fig. 8.  Comparison of experimental and simulated results.

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Fig. 9.  Equivalent electric circuit of the nanopowder samples.

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Table 1.   The values of the phases ($\theta )$ of the impedance at initial state and largest pressure ($p)$ at different frequencies.

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    Received: 15 June 2014 Revised: Online: Published: 01 February 2015

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      Article Navigation >  Journal of Semiconductors  > 2015  >  36(2): 023002
      Muhammad Tariq Saeed Chani, Sher Bahadar Khan, Kh. S. Karimov, M. Abid, Abdullah M. Asiri, Kalsoom Akhtar. Synthesis of metal oxide composite nanosheets and their pressure sensing properties[J]. Journal of Semiconductors, 2015, 36(2): 023002. doi: 10.1088/1674-4926/36/2/023002 ****M T S Chani, S B Khan, Kh. S. Karimov, M. Abid, A. M. Asiri, K Akhtar. Synthesis of metal oxide composite nanosheets and their pressure sensing properties[J]. J. Semicond., 2015, 36(2): 023002. doi:  10.1088/1674-4926/36/2/023002.
      Citation:
      Muhammad Tariq Saeed Chani, Sher Bahadar Khan, Kh. S. Karimov, M. Abid, Abdullah M. Asiri, Kalsoom Akhtar. Synthesis of metal oxide composite nanosheets and their pressure sensing properties[J]. Journal of Semiconductors, 2015, 36(2): 023002. doi: 10.1088/1674-4926/36/2/023002 ****
      M T S Chani, S B Khan, Kh. S. Karimov, M. Abid, A. M. Asiri, K Akhtar. Synthesis of metal oxide composite nanosheets and their pressure sensing properties[J]. J. Semicond., 2015, 36(2): 023002. doi:  10.1088/1674-4926/36/2/023002.
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      Synthesis of metal oxide composite nanosheets and their pressure sensing properties

      DOI: 10.1088/1674-4926/36/2/023002
      • 1.

        Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah 21589, Saudi Arabia

      • 2.

        Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia

      • 3.

        Interdisciplinary Research Center, COMSATS Institute of Information Technology, Wah Cantt, Pakistan

      • 4.

        Physical Technical Institute of Academy of Sciences, Dushanbe 734025, Tajikistan

      • 5.

        Division of Nano Sciences and Department of Chemistry, Ewha Womans University, Seoul, Korea

      Funds:

      Project supported by King Abdulaziz University (No. T-001/431).

      More Information
      • Corresponding author: E-mail: tariqchani@hotmail.com
      • Received Date: 2014-06-15
      • Accepted Date: 2014-08-19
      • Published Date: 2015-01-25

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