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SUMMARY:Resistivity of Metal Oxides - Lakshay Jethi (TFM)
DTSTART:20111208T143000Z
DTEND:20111208T153000Z
UID:TALK33986@talks.cam.ac.uk
CONTACT:Kimberly Cole
DESCRIPTION:Cobalt ferrite nanoparticles prepared by chemical co-precipita
 tion route were synthesized and characterized using XRD\, infra-red spectr
 oscopy and electron paramagnetic resonance spectroscopy. These nanoparticl
 es can be used for sensing ethanol vapours. The physical properties releva
 nt to sensing aspects are investigated. The resistance\, responsiveness\, 
 sensitivity\, optimum working temperature and response time of cobalt ferr
 ite nanoparticle based semiconductor ethanol vapour sensor are obtained fr
 om the response and recovery curves. They are practically the same with mi
 nor deviations in the studied temperature range. The results show that the
  largest resistance increase was observed in the 25ºC measurements. On va
 rying the alcohol vapour concentration\, the resistance of the sensor vari
 es slightly in a particular temperature operating range. The mechanism for
  sensing ethanol will also be described.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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