Room temperature hydrogen gas sensitivity of nanocrystalline pure tin oxide

    Authors

    S. Shukla;S. Seal

    Comments

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    Abbreviated Journal Title

    J. Nanosci. Nanotechnol.

    Keywords

    nanocrystalline; oxygen-ion vacancies; sensor; sol-gel; tin oxide; SOL-GEL PROCESS; SENSING CHARACTERISTICS; FILM THICKNESS; H-2 SENSOR; THIN-FILM; SNO2; CO; SIZE; NANOPARTICLES; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

    Abstract

    Nanocrystalline (6-8 nm) tin oxide (SnO2) thin film (100-150 nm) sensor is synthesized via sol-gel dip-coating process. The thin film is characterized using focused ion-beam microscopy (FIB) and high-resolution transmission electron microscopy (HRTEM) techniques to determine the film thickness and the nanocrystallite size. The utilization of nanocrystalline pure-SnO2 thin film to sense a typical reducing gas such as hydrogen, at room temperature, is demonstrated in this investigation. The grain growth behavior of nanocrystalline pure-SnO2 is analyzed, which shows very low activation energy (9 kJ/mol) for the grain growth within the nanocrystallite size range of 3-20 nm. This low activation energy value is correlated, via excess oxygen-ion vacancy concentration, with the room temperature hydrogen gas sensitivity of the nanocrystalline pure-SnO2 thin film sensor.

    Journal Title

    Journal of Nanoscience and Nanotechnology

    Volume

    4

    Issue/Number

    1-2

    Publication Date

    1-1-2004

    Document Type

    Article

    Language

    English

    First Page

    141

    Last Page

    145

    WOS Identifier

    WOS:000220646100020

    ISSN

    1533-4880

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