Fyzikální ústav Akademie věd ČR

Progam CrysTBox je sada softwarových nástrojů k analýze difrakčního a přímého obrazu v transmisním elektronovém mikroskopu. Workshop představí jeho možnosti a poskytne zájemcům pro práci s ním základní trénink v jeho používání.

Monochromated, aberration-corrected scanning transmission electron microscopes (MAC-STEMs) are able to form intense electron probes as small as 0.5-1 Å in diameter, analyze single atoms spectroscopically (by electron energy loss spectroscopy (EELS) or energy-dispersive X-ray spectroscopy (EDXS)), detect vibrational EEL spectra, and perform many other types of experiments that we did not think would become possible as recently as 5 years ago.

Ten years ago, ground-breaking experimental studies of graphene – a monolayer of carbon with honeycomb structure – were reported. Charge carriers in graphene are described by the Weyl-Hamiltonian for massless particles, resulting in interesting properties such as an unusual quantum Hall effect or Klein tunneling which sparked the interest of scientists around the world. They are characterized by a high mobility, which makes graphene interesting for electronic applications such as high frequency transistors and frequency mixers.