CNS Virtual Microscopy at UM-StL

Analysis Tools: [ImageJ] [NanoCalc] [DiffCalc] [MinCryst] [ClusterLab] [Practicals]

Mobile-Friendly Real-Time Electron Optics

A link to, and some explanation on the use of, our Javascript/HTML5 TEM simulator* is on our google electron-detectives site here.

A special version has been set up to examine various forms of disordered carbon on-line, apropo work here on presolar carbon. Can YOU tell which unknown contains faceted nanocones?

The simulator (as well as our now-ancient on-line focus and astigmatism simulator linked below) uses the strong phase/amplitude object algorithm discussed in this earlier webpage, and in this new draft paper** on its relevance to courses in Modern Physics.

A more tutorial paper requested by Microscopy Today, and a paper on use of such simulators to prototype interfaces to computer-controlled microscopes for digital-darkfield determination of 3D-lattice parameters/orientations (e.g. from polycrystal lattice-images taken at more than one tilt), are both under development. Arrangements for exploring procedurally-generated nanoworlds may not be too far behind!

* cf. P. Fraundorf, Stephen Wedekind, Taylor Savage and David Osborn (2016) "Single-Slice Nanoworlds Online", Microscopy and Microanalysis 22:S3, 1442-1443 pdf hal-01362470.
** cf. P. Fraundorf (2016) "Piecewise-continuous nanoworlds online." UMSL Dept. of Physics & Astronomy/Center for Nanoscience, pdf hal-01364382.

Three Dimensional Simulators using Java

LiveGraphics3D Simulators
JMol Simulators
3mm perforated disk
silicon nanocluster diffraction
3mm grid with holey C film
srilankite diffraction simulators
more interactive models
more model/data challenges

Large Zoomable Images

nano particles

tubes, catalysts, sugar phosphate polymers and films

defects in large (self-supporting disk) crystals

red giant starsmoke after ultramicrotomy

Focus and Astigmatism Correction

Discussion Resources

ImageJ Routines Under Development

Check our digital darkfield page for the latest information on these. In addition to digital darkfield routines for mapping periodicites and sub-pixel lattice spacing changes across an image, routines of interest cover things like projected potential from atom positions; strong phase object HREM from projected potential; Log-Log roughness spectra of topographic images; azimuthal averaging w/offset analysis; contact-mode AFM/LFM/LDM image simulation; single crystal and powder electron diffraction simulation/indexing; and fringe-visibility/Kikuchi band plots.

Mathematica 6+ Routines Under Development

These should be possible to test with Wolfram's free Mathematica Player. Since they are still in a development phase, critical feedback on them would be most welcome.

Some even more ancient (much less than 64 bit) program resources may be found here.