Field enhanced fabrication of metallic nanostructures using millisecond-pulsed scanning tunnelling microscopy

P. A. Campbell (Lead / Corresponding author), G. A. Farnan, D. G. Walmsley

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Scanning tunnelling microscopy (STM) can be used as an effective tool for the manipulation of atoms on surfaces. However, it is a laborious procedure, often taking several hours to construct even the simplest patterns. To address this constraint, we have investigated the use of distinct tip geometries combined with voltage pulsing in an STM as a method of rapid nanostructure fabrication. A computational finite-element based electrostatic model enables those tip geometries which can lead to a particular geometrical pattern to be identified. The predictions in the case of a truncated circular cone are confirmed by experimental observation using voltage-pulsed STM. Constructs comparable both in size and morphology to quantum corral type structures were constructed with assembly times in the millisecond regime. The mechanism of formation is discussed.
    Original languageEnglish
    Pages (from-to)69-74
    Number of pages6
    JournalNanotechnology
    Volume13
    Issue number1
    DOIs
    Publication statusPublished - 2002

    Keywords

    • Scanning tunnelling microscopy (STM)
    • STM
    • Nanoscale science
    • Low-D systems

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