In Situ Room Temperature Electron-Beam Driven Graphene Growth from Hydrocarbon Contamination in a Transmission Electron Microscope

In situ straining experiments in the transmission electron microscope

Beam-induced motion of adatoms in the transmission electron microscope.

Equations governing the elastic scattering of electrons are applied to the knock-on displacement of atoms along a substrate, yielding analytical expressions for the surface-translation energy, threshold incident energy, and displacement rate. For a surface perpendicular to the incident beam, scattering angles around 90° contribute most to the kinetic energy of surface atoms. Tilting the specime...

Monte Carlo estimation of electron contamination in a 18 MV clinical photon beam

Background: The electron contamination may reduce or even diminish the skin sparing property of the megavoltage beam. The detailed characteristics of contaminant electrons are presented for different field sizes and cases. Materials and Methods: The Monte Carlo code, MCNPX, has been used to simulate 18 MV photon beam from a Varian Linac-2300 accelerator. All dose measurements were car...

In Situ Lift-out with a Focused-ion Beam/scanning-electron Microscope: a New Technique for Creating Transmission-electron-microscope Samples of Earth and Planetary

Introduction: Information on crystal chemistry and structure is fundamental to understanding the chemical and physical processes that occurred during the formation of the solar system. The combination of atomic-resolution imaging and compositional analysis make the transmission electron microscope (TEM) a powerful tool for gaining insight into such processes and addressing a wide range of geoch...

Applying shot boundary detection for automated crystal growth analysis during in situ transmission electron microscope experiments

In situ scanning transmission electron microscopy is being developed for numerous applications in the study of nucleation and growth under electrochemical driving forces. For this type of experiment, one of the key parameters is to identify when nucleation initiates. Typically, the process of identifying the moment that crystals begin to form is a manual process requiring the user to perform an...