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J Nanosci Nanotechnol. 2011 Dec;11(12):10687-90.

Fabrication of CoPt ultra-sharp single atom tips.

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Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan.


Two kinds of new nano tips with potential to magnetic application are fabricated. One is a PtCo alloy pyramidal tip formed by surface faceting, the other is a Pt based Co tip formed by the epitaxy with a proper growth mode. Ultra high vacuum-field ion microscopy with atomic resolution is used to investigate the atomic structures of the tip apex after various sharpen treatments.


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