• Two-stage adsorption and desorption processes in some nitroaromatic semiconductor-vapour systems : implications in compensation effect in dark conduction process

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    • Keywords


      Nitroaromatic semiconductor; adsorption kinetics; desorption kinetics; compensation effect

    • Abstract


      Adsorption and desorption ofn-hexane, cyclohexane, CCl4, C6H6 ethylacetate, methanol and ethanol vapours on the crystallite surfaces of 2-nitrofluorene and three isomeric nitrobenzoic acid semiconductors have been investigated using electrical conductivity as a probe. Kinetic analysis data show that in all these vapour-semiconductor systems, the adsorption is a two-stage process. Existence of any relationship between the adsorption process and the compensation effect in dark conduction process has been examined. The compensation effect is generally observed in cases where the change in semiconduction activation energy is caused by a two-stage adsorption process.

    • Author Affiliations


      K M Jain1 Alpana Ghosh1 T N Misra1

      1. Optics Department, Indian Association for the Cultivation of Science, Calcutta - 700 032, India
    • Dates

  • Journal of Chemical Sciences | News

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