We demonstrate a simple capacitance-based method to quickly and efficiently locate micron-sized conductive samples, such as graphene flakes, on insulating substrates in a scanning tunneling microscope (STM). By using edge recognition, the method is designed to locate and to identify small features when the STM tip is far above the surface, allowing for crash-free search and navigation. The method can be implemented in any STM environment, even at low temperatures and in strong magnetic field, with minimal or no hardware modifications.
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Research Article| July 06 2011
Self-navigation of a scanning tunneling microscope tip toward a micron-sized graphene sample
Guohong Li, Adina Luican, Eva Y. Andrei; Self-navigation of a scanning tunneling microscope tip toward a micron-sized graphene sample. Rev. Sci. Instrum. 1 July 2011; 82 (7): 073701. https://doi.org/10.1063/1.3605664
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