Past event

School of Chemistry Colloquium: Prof. David McComb (Ohio State University) High resolution electron energy-loss spectroscopy for the study organic and biological systems in the scanning transmission electron microscope

School of Chemistry Colloquium. This event is open to final year undergraduate students, MSc students, PhD students, Post-Doctoral Research Fellows and staff.

The drive to characterize chemistry, structure and bonding with high spatial resolution has driven the exciting developments in electron energy-loss spectroscopy (EELS) in the scanning transmission electron microscope (STEM) over the last two decades. This has been achieved with the development of high-performance electron monochromators, improved spectrometer electron optics and introduction of new detectors with a high detector quantum efficiency (DQE). [1] For example, using a STEM equipped with a thermally assisted field emission source enables EELS to be performed with an energy resolution (E) in the range 0.5-0.8eV as measured by the full width half maximum (FWHM) of the zero-loss peak in the spectrum. Introduction of a commercially available monochromated instrument at the turn of the century enabled E

More information on this event