ZnO hierarchical nanostructures grown at room temperature and their C 2H5OH sensor applications

Kang Min Kim, Hae Ryong Kim, Kwon Il Choi, Hyo Joong Kim, Jong Heun Lee

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)

    Abstract

    Highly crystalline ZnO hierarchical nanostructures were prepared at room temperature through the alkaline hydrolysis of zinc salt by the forced mixing of two immiscible solutions: Zn-nitrate aqueous solution and oleic-acid-dissolved n-hexane solution. The oleic acid acted as a surfactant in the room-temperature formation of well-defined ZnO hierarchical nanostructures, which subsequently demonstrated a sensitive and selective detection of C2H 5OH. The responses of these hierarchical nanostructures to 10-100 ppm C2H5OH ranged from 15.7 to 177.7, which were 7-9 times higher than those of the agglomerated nanoparticles.

    Original languageEnglish
    Pages (from-to)745-751
    Number of pages7
    JournalSensors and Actuators, B: Chemical
    Volume155
    Issue number2
    DOIs
    Publication statusPublished - 2011 Jul 20

    Bibliographical note

    Funding Information:
    This work was supported by KOSEF NRL program grant funded by the Korean government (MEST) (No. R0A-2008-000-20032-0 ) and the Fundamental R&D program for Core Technology of Materials (M2008010013) funded by Ministry of Knowledge Economy .

    Keywords

    • CHOH sensors
    • Gas sensors
    • Hierarchical nanostructures
    • ZnO

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Instrumentation
    • Condensed Matter Physics
    • Surfaces, Coatings and Films
    • Metals and Alloys
    • Electrical and Electronic Engineering
    • Materials Chemistry

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