An ultra high resolution (1Å) Field Emission Transmission Electron Microscope, with Cs Aberration Correctors for both TEM and STEM, in purpose built accommodation with remote control and microanalysis for:
This instrument is based on a unique high performance JEOL 2200 FS TEM and STEM system with Cs aberration correctors for both TEM imaging and on the 1Å high angle annular dark field (HAADF) STEM probe; as determined by the transforms of Si (110) images.
It is one of the world’s forefront electron microscopes with 1Å resolution but the capability which sustainably differentiates the York JEOL 2200 FS system is the facility for dynamic in-situ experiments under operational conditions of controlled temperature and in future gas environments.
Dynamic in-situ experiments study the development of nanostructures with processing and access materials forms which are metastable with respect to temperature and where provided atmosphere.
In a single experiment the sequence of events in the development of nanoscale microstructures can be followed in real time with atomic resolution.
New science requires extraction of the maximum possible information from each unique image in an ever changing series; without the regular opportunity for through focal series and extensive post acquisition processing of multiple images.
We are pioneering the development of Aberration Corrected (AC) TEM and STEM for dynamic in-situ experiments and this is important in:
Uniquely among JEOL AC systems the York 2200 FS 2AC has both a gas tolerant TMP vacuum system and a wider gap HRP objective lens polepiece in order to accommodate a 1000ºC hot stage (delivered late December 2007) or other in-situ apparatus. The main downside with the HRP polepiece is a doubling of the natural Cs coefficient but the potentially deleterious influence of this on imaging is greatly moderated by the introduction of CEOS C3 aberration correction (Cs => ~0).
At York the JEOL 2200 FS is installed in a new purpose built pod with a separate "building in a building" construction, independent 18 meter deep foundations and a 100 ton base block of concrete for the column room. This is isolated from the power supplies and support services in separate rooms; as are the operators and remote (only) controls.
Early applications have included functionalised nanoparticle studies.