Note: advancement in tip etching for preparation of tunable size scanning tunneling microscopy tips.
نویسندگان
چکیده
The two aspects of a scanning tunneling microscopy tip, the macroscopic profile and the nanoscale apex, can be tailored by controlling the tension during electrochemical etching and the solution-electrode contact area via acetone vapor. The apex diameter is shown to be proportional to the square root of the tension, and is demonstrated over apex diameters of 150-500 nm. The apex was found to be created in four distinct shapes where a secondary etching can reshape the tip into a single geometry. Improvement in tip height and stability of the profile are demonstrated versus a non-acetone fabrication control.
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ورودعنوان ژورنال:
- The Review of scientific instruments
دوره 86 2 شماره
صفحات -
تاریخ انتشار 2015