UCI-STEM will be a combination of lectures, labs, and demos on various techniques
Lectures for STEM Imaging and Spectroscopy track:
- Basics of transmission electron microscopy (TEM) : electron sources, lenses, apertures, resolution, recording media, electron scattering, aberration etc.
- TEM imaging: various contrast in TEM, mass, diffraction and phase contrast, contrast transfer etc.
- Electron diffraction: physics of diffraction, reciprocal space, Bloch wave, SAED, CBED, nanobeam etc.
- Basics of scanning transmission electron microscopy (STEM) : probe forming, reciprocity, Ronchigram, various detectors (BF, HAADF, MAADF, ABF, SEI etc.
- Aberration correction: defining aberration and review how to correct aberrations in electron microscope.
- Electron energy loss spectroscopy (EELS): review physics of EELS and review applications of EELS.
- Energy dispersive X-ray spectroscopy (EDS): review physics of EDS and review applications of EDS.
Labs for STEM Imaging and Spectroscopy track:
- Conventional TEM and diffraction lab: go over TEM alignment, discussing Cs and astigmatism, apertures, conducting some tilting and diffraction patterns.
- Conventional STEM lab: review how to use the shadow image and Ronchigram to align STEM and locate regions of interest (ROI), how to select an optimum CL aperture and then center it.
- Aberration corrected STEM lab: hands-on practice on manual adjustment and auto-tuning of aberrations, finding ROI using shadow image and taking high-resolution STEM images.
- STEM EELS/EDS lab: hands-on practice on how to prepare STEM to conduct EELS and EDS, including selecting a probe size, probe forming aperture, and camera length and EELS entrance aperture.
- Monochromated EELS: this is a demo on monochromated EELS.
Lectures for Liquid Cell TEM track:
- Basics of transmission electron microscopy (TEM) : electron sources, lenses, apertures, resolution, recording media, electron scattering, aberration etc.
- TEM imaging: various contrast in TEM, mass, diffraction and phase contrast, contrast transfer.
- Electron diffraction: physics of diffraction, reciprocal space, Bloch wave, SAED, CBED, nanobeam.
- Basics of liquid cell holder: discussing design, types, and construction of liquid cell holder, including beam-liquid interaction and impact of this on your experiments.
- Applications of liquid cell holder: review what you can do utilizing a liquid cell holder.
Labs for Liquid Cell TEM track:
- Conventional TEM and diffraction lab: go over TEM alignment, discussing Cs and astigmatism, apertures, conducting some tilting and diffraction patterns.
- Sample preparation: sample prep is extremely important in liquid cell TEM, reviewing key steps, for example, cleaning, aligning chips, testing for leaks and etc.
- Liquid Cell TEM experiment: conduct liquid cell TEM in one of our TEM, learning how to focus on the sample, find region of interest and collect data.
- Electrochemistry experiment: conduct electrochemistry experiment.