Farewell to Min Yu

With regret we say good bye to Min Yu, who is leaving the group for personal reasons.  She’s done great work on nanocatalysts and metallic glasses, so we hope to see her back again in at some point in the future.

Posted in Uncategorized | Comments Off

Li’s paper on electron correlation microscopy published

Li’s paper announcing the new electron correlation microscopy technique for measuring relaxation dynamics in materials is now published in Microscopy and Microanalysis.

Posted in Uncategorized | Comments Off

Jie Feng wins MSA Presidential Scholar award at M&M 2015

Jie Feng, who is co-advisor by Prof. Voyles and Prof. Morgan of the computational materials group has won a Presidential Scholar Award from the Microscopy Society of America for his work on visualizing single vacancies in LaMnO3 using high-precision STEM.  Congratulations Jie!

Posted in Uncategorized | Comments Off

New paper on shear bands

Paul has contributed to a new paper using quantitative electron microscopy to measure the density of shear bands that appears this week in Physical Review Letters.  The primary work was done by Vitalij Schmidt, and graduate student with Harald Rosner and Gerhard Wilde at the University of Muenster.  Vitalij just finished a six-week visit to the Voyles lab for more experiments along the same lines, so stay tuned for more in the future!

Posted in Uncategorized | Comments Off

Post-doc opening in computational structure determination

A joint post-doc position with the Dane Morgan of the UW Computational Materials Group on next-generation structure determination is now available.  This post-doc will develop new tools for determining 3D structure from high-precision STEM data and computed energies using advanced optimization techniques.  For full details and how to apply, see the the complete job listing.

Posted in Uncategorized | Comments Off

Congratulations Andy and Yizhang!

Both Andy and Yizhang successfully defended theses yesterday.  Congratulations!  Andy will be joining Eva Olsson’s laboratory at Chalmers University as a post-doc, and Yizhang will be continuing his education in data science and statistics at the University of Delaware.

Posted in Uncategorized | Comments Off

Andy wins Turnbull publication award

Andy has won the Materials Science Program 2015 Turnbull Research Award for his paper Picometre-precision analysis of scanning transmission electron microscopy images of platinum nanocatalysts.  Congratulations!

Posted in Uncategorized | Comments Off

Lots of papers!

New papers published by Andy on high precision STEM with big pixels and denoising STEM images, by Fengyuan on Co2(Mn,Fe)Si MTJs, and Li on MRO in ultrastable indomethacin thin films.  Raw data for many of these publications and others by the group is available from the Papers page.

Posted in Uncategorized | Comments Off

Video of non-rigid registration

The video above is an example of non-rigid registration of high-resolution STEM images, a new tool we have developed to enable high precision STEM.

Posted in Uncategorized | Comments Off

Fluctuation microscopy MATLAB data analysis routines

We have made available for download a set of fluctuation electron microscopy data analysis routines for electron nanodiffraction patterns written in MATLAB.  Right now, the routines only calculate the variance of annular averages, and they only work for data files in the SER file format created by the TIA software on FEI electron microscopes.  The routines implement TEM sample thickness filtering based on an ADF image acquired simultaneously with the nanodiffraction patterns, as described in Jinwoo’s paper.  Bug fixes, modifications, and improvements are welcome!

Posted in Uncategorized | Comments Off