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Ion beam analysis of geometrically structured samples

Author(s): David Jezeršek (Author), Žiga Šmit (Supervisor)

Year: 2011

Type: Doctoral dissertation

An experimental set-up for the detection of scattered projectile ions was constructed at the external (in air) beamline of the Microanalytical Center at the Jožef Stefan Institute. The system is composed of a detector for the analysis of back-scattered projectiles, casually called the RBS detector, a precise positioning system and …

Synthesis and characterization of perovskite nanostructures

Author(s): Kristina Žagar (Author), Miran Čeh (Supervisor)

Year: 2011

Type: Doctoral dissertation

Polycrystalline, BaTiO3 nanorods and SrTiO3 nanotubes were synthesized by the electrophoretic deposition (EPD) of a barium titanate sol and a strontium titanate sol into 2D ordered anodic aluminium oxide templates (AAO) with a subsequent thermal treatment and template removal. The BaTiO3 nanorods grown within the AAO template membranes had diameters …

Mercury in the Process of Cement Clinker Production and Emission Control

Author(s): Tanja Ljubič Mlakar (Author), Milena Horvat (Supervisor)

Year: 2011

Type: Doctoral dissertation

Mercury is a very toxic element. Due to its volubility it is present everywhere in the environment at ambient temperature. High temperature processes increased levels of mercury on the global scale. Global and European action plans were established to reduce mercury emissions and remove mercury from the environment. Cement plants …

Development of analytical methods for speciation of organotin compounds in environmental samples using gas chromatography and mass spectrometry

Author(s): Mitja Vahčič (Author), Janez Ščančar (Supervisor)

Year: 2011

Type: Doctoral dissertation

Organotin compounds (OTCs) are the organometallic compounds with the most numerous applications. Today, it is more than 50 years of their intensive development and use. While they are highly useful chemicals they are also extremely toxic to a wide array of aquatic and terrestrial living organisms at very low concentrations. …

Migration of critical radionuclides in the area of former uranium mine Žirovski vrh

Author(s): Marko Štrok (Author), Borut Smodiš (Supervisor)

Year: 2011

Type: Doctoral dissertation

A study of the migration of critical radionuclide in the area of the former uranium mine of Žirovski vrh in Slovenia was performed. Critical natural radionuclides are defined as the long-lived natural radionuclides from the uranium-radium decay chain, which are 238U, 234U, 230Th, 226Ra, 210Pb and 210Po. In the area …

Hydraulic load cells for measurement of small loads

Author(s): Roman Pačnik (Author), Franc Novak (Supervisor), Marija Kosec (Co-Supervisor)

Year: 2011

Type: Doctoral dissertation

This work deals with the design of a small kitchen appliance with a weighing function integrated into a control loop in order to prevent unbalanced movement of the appliance during operation. In this particular case, the weighing should be appropriate for larger amounts (up to 5 kg) of ingredients. The …

Synthesis and Characterization of Bi12SiO20 Thin Films Prepared by Sol-gel Method

Author(s): Asja Veber (Author), Danilo Suvorov (Supervisor)

Year: 2010

Type: Doctoral dissertation

The sillenites Bi12MO20 (M = Si, Ge, Ti, Pb, Mn, B1/2P1/2) have been recognised as promising bulk materials for electronic applications because their dielectric properties (5.5 GHz: ε = 37.4 - 41, τf = -19 – (-84) ppm/K, Q x f = 800 - 8100 and Tsin = 680 - …

Test Infrastructure Design for ADC Cores in System-on-Chip

Author(s): Peter Mrak (Author), Franc Novak (Supervisor)

Year: 2010

Type: Doctoral dissertation

With the advent of System-on-Chip (SoC), intense research efforts are being carried out in order to find efficient practical solutions for testing deeply embedded, mixed-signal cores. Due to restricted access, a built-in self-test (BIST) of mixed-signal cores is in many cases a preferred alternative to a conventional test using external …

NMR Study of Photoisomerization in Bulk and Confined Liquid Crystals

Author(s): Blaž Zupančič (Author), Boštjan Zalar (Supervisor)

Year: 2010

Type: Doctoral dissertation

Deuteron nuclear magnetic resonance was used to study the phase separation behavior of photoisomerizable liquid crystal diheptylazobenzene (7AB). Under UV illumination, the elongated trans molecules are converted to boomerang shaped cis form, creating a binary trans-7AB and cis-7AB mixture. It was demonstrated that the concentration of both components can be …

Measuring the probability for heterogenous recombination of hydrogen and oxygen atoms on surfaces of fusion relevant materials

Author(s): Aleksander Drenik (Author), Miran Mozetič (Supervisor)

Year: 2009

Type: Doctoral dissertation

This thesis presents studies of probability of heterogeneous recombination of oxygen and hydrogen atoms on surfaces of different types of carbon-based materials. The probability of heterogenous recombination is described with a quantity called recombination coefficient, which is defined as the probability that an atom which impinges upon a solid surface …