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Supported File Formats

SXM Viewer natively reads Omicron/Anfatec SPM data, and supports Nanonis data through a conversion adapter.

Imaging formats

Format Files Notes
Omicron / Anfatec .txt header + binary channel files Native format; full header and multi-channel support
Nanonis .sxm Converted on first load into an Omicron-style header/channel cache, then handled identically to native files

Every loaded scan is automatically tagged as constant-height (CH) or constant-current (CC) based on header keywords and a small dz-offset heuristic - see Constant-height frame detection for how this shows up in the thumbnail grid.

Note

Nanonis conversion caches its results in a .sxmviewer_nanonis/ folder next to the source data, so repeat loads of the same folder are fast. This folder is safe to delete; it is rebuilt automatically the next time the folder is loaded.

Spectroscopy formats

Supported spectroscopy workflows include:

  • single-point spectroscopy traces (Omicron .dat files)
  • matrix / grid (CITS-style) spectroscopy, where many spectra are arranged on a 2D grid over an image
  • KPFM bias-spectroscopy traces, analyzed with the same parabola-fit tooling as any other spectroscopy channel

See Spectroscopy Overview for how these are browsed and analyzed.

Export-only formats

Scan channel data (not the whole session) can be exported as:

  • an XYZ point-cloud text file (x, y, z columns with a metadata header)
  • a WSxM-style .stp binary raster file

See CSV & Data Export for exact formats and entry points. .xyz files can also be imported, but only as a molecule-model overlay to place on top of a scan - not as scan/image data - see Molecule Overlays.

Notes

Note

The exact set of imported channels can depend on the header metadata available in the source files.

Note

Nanonis support is implemented through a conversion adapter that normalizes .sxm scans into the same header/channel representation used natively, rather than a fully separate code path - so once loaded, Nanonis and Omicron/Anfatec data behave identically throughout the app.