The potentiodynamic bottom-up growth of the tin oxide nanostructured layer for gas-analytical multisensor array chips

Fedor S. Fedorov, Dmitry Podgainov, Alexey Varezhnikov, Andrey Lashkov, Michail Gorshenkov, Igor Burmistrov, Martin Sommer, Victor Sysoev

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    We report a deposition of the tin oxide/hydroxide nanostructured layer by the potentiodynamic method from acidic nitrate solutions directly over the substrate, equipped with multiple strip electrodes which is employed as a gas-analytical multisensor array chip. The electrochemical synthesis is set to favor the growth of the tin oxide/hydroxide phase, while the appearance of metallic Sn is suppressed by cycling. The as-synthesized tin oxide/hydroxide layer is characterized by mesoporous morphology with grains, 250–300 nm diameter, which are further crystallized into fine SnO2 poly-nanocrystals following heating to 300°C for 24 h just on the chip. The fabricated layer exhibits chemiresistive properties under exposure to organic vapors, which allows the generation of a multisensor vector signal capable of selectively distinguishing various vapors.

    Original languageEnglish
    Article number1908
    JournalSensors (Switzerland)
    Volume17
    Issue number8
    DOIs
    Publication statusPublished - 18 Aug 2017

    Keywords

    • Cyclic voltammetry
    • Electrochemical deposition
    • Gas sensor
    • Multisensor array
    • Tin oxide

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