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  • Title: Single-step electrochemical method for producing very sharp Au scanning tunneling microscopy tips.
    Author: Gingery D, Bühlmann P.
    Journal: Rev Sci Instrum; 2007 Nov; 78(11):113703. PubMed ID: 18052476.
    Abstract:
    A single-step electrochemical method for making sharp gold scanning tunneling microscopy tips is described. 3.0M NaCl in 1% perchloric acid is compared to several previously reported etchants. The addition of perchloric acid to sodium chloride solutions drastically shortens etching times and is shown by transmission electron microscopy to produce very sharp tips with a mean radius of curvature of 15 nm.
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