Lecture 10, Fri.-9/25

We finished Ch. 5 by discussing the Wehnelt cap (grid) and bias control. We then started Ch. 5: Lens equation, lateral magnification, angular magnification, depths of field & focus.

Quiz 1 will be on Mon.-9/28

Lecture 6, Wed.-9/16

We discussed elastic scattering, plane waves, spherical waves, atomic scattering (form) factors, the weak phase-object approximation, and the electrostatic potential of atoms.

Lecture 3-Wed., 9/9

Lab 2 will be in EP 240 on Tues., 9/15.

We discussed units, the small-angle approximation, physical constants, electric potential and energy, wave-particle duality, and computing the wavelength of high-energy (relativisitic) electrons.

Lecture 2-Fri., 9/4

Announcements:

Lab 1 will begin on Tues., 9/8 in EP 211. This is the small room connected to EP 209.

Topics:

TEM-Ch. 1

•Reasons to use electrons instead of light for imaging nanomaterials

•Important contributions to optical and electron microscopy

•Major U.S. electron microscopy centers/facilities

•Prominent brands of electron microscopes

•Advantages/disadvantages of higher energy

•Units of length