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Alignment of One-Dimensional SnO2 Lines by Electrohydrodynamic Jet Printing.

Hanna Choi, Hyunsung Jung, Duck-Kyun Choi

    Journal of Nanoscience and Nanotechnology
    |July 20, 2016
    PubMed
    Summary

    Researchers developed one-dimensional tin oxide (SnO2) lines using electro-hydrodynamic jet-printing. Precise control over printing parameters and heat treatment enables the formation of continuous, aligned SnO2 lines for potential electronic applications.

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    Area of Science:

    • Materials Science
    • Nanotechnology
    • Semiconductor Devices

    Background:

    • One-dimensional (1-D) semiconducting metal oxide nanostructures are crucial for advanced electronic applications.
    • Electro-hydrodynamic (EHD) jet-printing offers a precise method for fabricating nanostructured materials.
    • Controlling the morphology and properties of 1-D SnO2 is essential for its integration into devices.

    Purpose of the Study:

    • To develop a method for fabricating 1-D tin oxide (SnO2) lines using EHD jet-printing.
    • To investigate the influence of printing parameters and heat treatment on the morphology and continuity of SnO2 lines.
    • To evaluate the electrical properties of the fabricated 1-D SnO2 structures.

    Main Methods:

    • Utilized EHD jet-printing of a tin chloride pentahydrate and polyvinylpyrrolidone (PVP) solution.

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  • Controlled ink viscosity, polymer/tin precursor ratio, and printing parameters (voltage, distance, flow rate, velocity).
  • Employed a two-step heat treatment (drying at 200°C, annealing at 600°C) to form SnO2 lines and remove PVP.

    • Main Results:

    • Successfully fabricated 1-D SnO2 lines with controllable linearity and shape.
    • Demonstrated that printing parameters (viscosity, Sn/PVP ratio, cone shape, droplet size, voltage, distance, flow rate) significantly impact line morphology.
    • Identified the critical role of tailored heat treatment to manage >90% volume reduction during polymer burnout and ensure continuous SnO2 lines.
    • Evaluated the electrical properties of 1-D SnO2 aligned on Si wafers with Au electrodes.

    Conclusions:

    • EHD jet-printing is a viable technique for producing 1-D SnO2 lines.
    • Precise control over precursor solution properties and printing parameters is key to achieving desired line morphology.
    • Optimized heat treatment is crucial for obtaining continuous 1-D SnO2 structures due to significant volume changes.
    • The fabricated 1-D SnO2 lines show potential for electronic device applications.