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2008.06.01 | Results from the Nion UltraSTEM™ and its brief history featured in Analytical Chemistry

Analytical Chemistry, the principal journal of the American Chemical Society, has published a brief article describing results obtained with the Nion UltraSTEM™100 and its history. The popular-level article features several interesting statements by leading electron microscopists. link

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2008.02.20 | Fast atomic-resolution elemental maps
Superlattice EELS

The Nion UltraSTEM™ 100, recently delivered to Cornell University, has produced atomic-resolution EELS elemental maps of Ti, Mn and La in a multilayer perovskite sample.  The net acquisition time for all the maps (shown at left) was 28 s. The statistical quality of the maps was such that changes in the chemical bonding of atoms in different locations could be discerned from the fine features in the spectra.  These capabilities are unprecedented – atomic resolution elemental maps have typically required tens of minutes or hours to record in other microscopes, and no bonding information was available in the maps. See Muller et al. (Science 2008, February 22 issue) for full details. linklink

Left: Atomic-resolution EELS chemical maps of La0.7Sr0.3MnO3 / SrTiO3 acquired by the UltraSTEM100

2008.02 | An overview of the UltraSTEM™ 100

A thorough description of the UltraSTEM 100 and of its design principles is published in Ultramicroscopy in February 2008. link

2008.01.21 | Nion’s UltraSTEM™ 100 inauguration

The first UltraSTEM 100 delivered by Nion has been fully commissioned and has recently been inaugurated at the UK SuperSTEM laboratory. The inauguration ceremony featured talks by Prof. David Delpy, FRS, head of UKs EPSRC (Engineering and Physical Sciences Research Council), Prof. Michael Brown, F.R.S., and Nion’s Dr. Ondrej Krivanek. The microscope is now available to the users of this highly productive shared-use facility. See more at http://www.superstem.com.

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