Fabrication of <1 1 0> oriented tungsten nano-tips by field-assisted water etching

Jo Onoda, Seigi Mizuno

    研究成果: ジャーナルへの寄稿学術誌査読

    13 被引用数 (Scopus)

    抄録

    We report the field-assisted H 2 O etching that enabled us to fabricate nano-tips from polycrystalline <1 1 0> oriented tungsten wires at room temperature. We optimized the sharpening procedure in order to obtain field emissions (FEs) with high collimation. The typical tip apex was composed of a large base and a nano-protrusion with a radius of curvature less than 3.5 . The narrowest opening angle (full width at half maximum) of the FE was 4.3° at 150 pA. We prepared two types of tips using two different applied bias voltages during the H 2 O etching. The electron microscope images and the analysis of Fowler-Nordheim (FN) plots revealed that the sizes of the individual bases depended on the fixed bias voltages during the H 2 O etching and affected their FE properties. In addition, we could confirm that the FE current from the nano-tip was more stable than that of the normal tip.

    本文言語英語
    ページ(範囲)8427-8432
    ページ数6
    ジャーナルApplied Surface Science
    257
    20
    DOI
    出版ステータス出版済み - 8月 1 2011

    !!!All Science Journal Classification (ASJC) codes

    • 化学 (全般)
    • 凝縮系物理学
    • 物理学および天文学(全般)
    • 表面および界面
    • 表面、皮膜および薄膜

    フィンガープリント

    「Fabrication of <1 1 0> oriented tungsten nano-tips by field-assisted water etching」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル