Ultra-high aspect ratio replaceable AFM tips using deformation-suppressed focused ion beam milling: Paper

Alexey Savenko, Izzet Yildiz, Dirch Hjorth Petersen, Peter Bøggild, Malte Bartenwerfer, Florian Krohs, Maria Oliva, Torsten Harzendorf

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Fabrication of ultra-high aspect ratio exchangeable and customizable tips for atomic force microscopy (AFM) using lateral focused ion beam (FIB) milling is presented. While on-axis FIB milling does allow high aspect ratio (HAR) AFM tips to be defined, lateral milling gives far better flexibility in terms of defining the shape and size of the tip. Due to beam-induced deformation, it has so far not been possible to define HAR structures using lateral FIB milling. In this work we obtain aspect ratios of up to 45, with tip diameters down to 9 nm, by a deformation-suppressing writing strategy. Several FIB milling strategies for obtaining sharper tips are discussed. Finally, assembly of the HAR tips on a custom-designed probe as well as the first AFM scanning is shown.
    Original languageEnglish
    Article number465701
    JournalNanotechnology
    Volume24
    Issue number46
    Number of pages8
    ISSN0957-4484
    DOIs
    Publication statusPublished - 2013

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