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- W2891657981 abstract "Scanning tunneling microscopes are used to examine surfaces and surface properties with sub-nanometer precision. However, this high precision means these microscopes are extremely sensitive to vibration. A large body of work has examined vibration isolation systems that damp any vibration mechanically transmitted from the environment to the microscope through solid material. Less work has examined the effect of acoustic vibrations transmitted from the environment to the microscope through a gaseous atmosphere. For STMs housed in gaseous environments, such as gloveboxes, an understanding of how acoustic noise manifests within the tunneling current is essential to effectively isolate the microscope. In this paper, we examine an acoustic noise signal of a single frequency in order to clearly identify the presence or absence of the peak in the FFT of the STM tunneling current. We demonstrate that during imaging, even though the acoustic noise can significantly degrade the image, the frequency peak of the acoustic noise signal does not clearly appear in the FFT of the tunneling current. Thus, the best way to identify acoustic noise and isolate scanning tunneling microscopes it is while the tips are engaged but not scanning. Further, we achieve atomic resolution on HOPG in a glovebox with the pumps running, demonstrating that acoustic noise can be mitigated using a homemade, foam-lined acoustic shell." @default.
- W2891657981 created "2018-09-27" @default.
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- W2891657981 date "2018-09-01" @default.
- W2891657981 modified "2023-09-26" @default.
- W2891657981 title "Examining tunnel current responses to acoustic excitation for STMs in gaseous environments" @default.
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- W2891657981 doi "https://doi.org/10.1063/1.5043289" @default.
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