Deposition of Large Organic Molecules in UHV Conditions, Tomáš Krajňák (supervisor: Jan Čechal), BUT 2019

In this thesis, large organic molecules (DM15N, DM18N, Cu(dbm)2) were deposited. These molecules are cannot be deposited by thermal sublimation due the fact that they decompose at lower temperature than they sublime. The employed molecules to single molecular magnets, which can be potentially used as quantum bites (qubit). The new method of deposition atomic layer injection made by Bihur Crystal company was introduced and tested. The method uses liquid solution with molecules which is driven by argon gas through pulse valve to the sample placed in ultra-high vacuum chamber. During the deposition, droplets of solution are formed on the sample surface. The solvent can be removed by light annealing or by keeping the sample in the vacuum for couple of days. The molecules were investigated by x-ray photoelectron spectroscopy and by scanning electron microscopy to determine fragmentation of the molecules, to study topography of the resultant surface and homogeneity of the deposited layer. We found conditions at which the intact molecules are deposited on the sample surfaces and form molecular nano- and micro- crystals.

Terahertz time domain spectroscopy of diabolo antennas, Katarína Rovenská (supervisor: Rainer Hillenbrand), CIC NanoGUNE 2019

The presented thesis deals with the initial steps of the PETER project and describes the main outcomes of the work done within the months of six-month stay at CIC nanoGUNE. This was mainly focused on the plasmonic part of the project, specically on the fabrication of micro-scale plasmonic diabolo antennas via direct laser writing and the characterization of these antennas by the means of terahertz time domain spectroscopy (THz-TDS).