Micro and Nano Scale Sensors for Room Temperature Detection of Methane

  • Author / Creator
    Rahimi, Mehrnaz
  • Detection of methane at room temperature is a challenge due to its inert properties, such as being non polar and showing little tendency to lose or gain electrons at room temperature. Here, we have shown two methods for detection of methane at room temperature via employing micro and nano scale sensing platforms. Nanomechanical IR spectroscopy for methane detection without using any chemoselective interface via measuring the photothermal effect of adsorbed methane on a thermally sensitive cantilever have been used to obtain molecular signature of femto gram quantities of adsorbed methane on the cantilever surface and absorbed mass of methane and residence time have been calculated using the kinetic theory of gases. In the second method a microfabricated interdigitated electrode coated with palladium-single walled carbon nanotubes composites (Pd-SWCNTs) have been used as room temperature methane sensor. Also, fabrications of Pd nanoparticles and incorporation into SWCNTs have been demonstrated.

  • Subjects / Keywords
  • Graduation date
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
    • Department of Chemical and Materials Engineering
  • Specialization
    • Chemical Engineering
  • Supervisor / co-supervisor and their department(s)
    • Thundat, Thomas ( Chemical and Materials Engineering)
  • Examining committee members and their departments
    • Mitra, Sushanta (Mechanical Engineering)
    • Chung, Hyun-Joong (Chemical and Materials Engineering)
    • Thundat, Thomas (Chemical and Materials Engineering)