dorsal/arxiv
View SchemaThe instrument response function in air-based scanning tunneling microscopy
| Authors | P. Fraundorf, J. Tentschert |
|---|---|
| Categories | |
| ArXiv ID | physics/9712003 |
| URL | https://arxiv.org/abs/physics/9712003 |
| Journal | Ultramicroscopy 37 (1991) 125-129 |
Abstract
The distinction between point and line resolution in transmission electron microscopy (TEM) arises because an ability to image sub-0.2 nm fringes is a necessary, but not a sufficient, condition for imaging individual atoms. In scanned tip microscopy, as in TEM, empirical data on instrument response should precede assertions about point resolution. In the ``slow scan limit'', time-domain noise and geometry effects decouple, and tip shape can take on the role of a 2-dimensional impulse response function. We indicate here that nuclear track pits can be used to quantitatively measure tip geometry with nanometer-scale resolution in three dimensions, that stationary tip images provide a robust measure of time-domain instabilities, and that when these data are taken before and after imaging an unknown, images with instrument response quantitatively constrained by experiment are possible. Specimen-induced tip effects also become measurable in situ.
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"abstract": "The distinction between point and line resolution in transmission electron\nmicroscopy (TEM) arises because an ability to image sub-0.2 nm fringes is a\nnecessary, but not a sufficient, condition for imaging individual atoms. In\nscanned tip microscopy, as in TEM, empirical data on instrument response should\nprecede assertions about point resolution. In the ``slow scan limit\u0027\u0027,\ntime-domain noise and geometry effects decouple, and tip shape can take on the\nrole of a 2-dimensional impulse response function. We indicate here that\nnuclear track pits can be used to quantitatively measure tip geometry with\nnanometer-scale resolution in three dimensions, that stationary tip images\nprovide a robust measure of time-domain instabilities, and that when these data\nare taken before and after imaging an unknown, images with instrument response\nquantitatively constrained by experiment are possible. Specimen-induced tip\neffects also become measurable in situ.",
"arxiv_id": "physics/9712003",
"authors": [
"P. Fraundorf",
"J. Tentschert"
],
"categories": [
"physics.ins-det",
"cond-mat.mtrl-sci",
"physics.optics"
],
"journal_ref": "Ultramicroscopy 37 (1991) 125-129",
"title": "The instrument response function in air-based scanning tunneling microscopy",
"url": "https://arxiv.org/abs/physics/9712003"
},
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