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1. Nisha, R. Development of semiconductor metal oxide gas sensors for the detection of NO2 and H2S gases.

Degree: instrumentation, 2013, Cochin University of Science and Technology

One of the main challenges in the development of metal-oxide gas sensors is enhancement of selectivity to a particular gas. Currently, two general approaches exist for enhancing the selective properties of sensors. The first one is aimed at preparing a material that is specifically sensitive to one compound and has low or zero cross-sensitivity to other compounds that may be present in the working atmosphere. To do this, the optimal temperature, doping elements, and their concentrations are investigated. Nonetheless, it is usually very difficult to achieve an absolutely selective metal oxide gas sensor in practice. Another approach is based on the preparation of materials for discrimination between several analyte in a mixture. It is impossible to do this by using one sensor signal. Therefore, it is usually done either by modulation of sensor temperature or by using sensor arrays. The present work focus on the characterization of n-type semiconducting metal oxides like Tungsten oxide (WO3), Zinc Oxide (ZnO) and Indium oxide (In2O3) for the gas sensing purpose. For the purpose of gas sensing thick as well as thin films were fabricated. Two different gases, NO2 and H2S gases were selected in order to study the gas sensing behaviour of these metal oxides. To study the problem associated with selectivity the metal oxides were doped with metals and the gas sensing characteristics were investigated. The present thesis is entitled “Development of semiconductor metal oxide gas sensors for the detection of NO2 and H2S gases” and consists of six chapters.

Cochin University of Science And Technology

Subjects/Keywords: Sensors; Chemical Sensor; Gas Sensors; Sensor Fabrication; Pure ZnO; Indium Doped ZnO

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APA (6th Edition):

Nisha, R. (2013). Development of semiconductor metal oxide gas sensors for the detection of NO2 and H2S gases. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/3481

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Nisha, R. “Development of semiconductor metal oxide gas sensors for the detection of NO2 and H2S gases.” 2013. Thesis, Cochin University of Science and Technology. Accessed July 17, 2019. http://dyuthi.cusat.ac.in/purl/3481.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Nisha, R. “Development of semiconductor metal oxide gas sensors for the detection of NO2 and H2S gases.” 2013. Web. 17 Jul 2019.

Vancouver:

Nisha R. Development of semiconductor metal oxide gas sensors for the detection of NO2 and H2S gases. [Internet] [Thesis]. Cochin University of Science and Technology; 2013. [cited 2019 Jul 17]. Available from: http://dyuthi.cusat.ac.in/purl/3481.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nisha R. Development of semiconductor metal oxide gas sensors for the detection of NO2 and H2S gases. [Thesis]. Cochin University of Science and Technology; 2013. Available from: http://dyuthi.cusat.ac.in/purl/3481

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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