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Atmospheric pressure plasma jet deposition of nanoparticles and its applications

Author(s): Aswathy Vasudevan (Author), Aleksander Zidanšek (Supervisor), Uroš Cvelbar (Co-Supervisor)

Year: 2022

Type: Doctoral dissertation

Atmospheric pressure non-equilibrium plasma jets in material processing have received substantial attention in the past two decades and are still in the developing stage with a growing interest in material synthesis and surface processing. The main opportunities of these techniques are their potential cost reductions in apparatus and handling. Because …

Protection of biomedical alloys by thin films of alumina and hafnia prepared by atomic layer deposition

Author(s): Ivan Spajić (Author), Ingrid Milošev (Supervisor)

Year: 2022

Type: Doctoral dissertation

One of the most commonly used metal materials for the manufacture of biomedical implants are stainless steel and titanium-based alloys. Due to the specific conditions and complex environment in the human body, different strategies have been employed to protect them and improve their functionality in vivo. In this thesis, a …

High-precision wide-bandwidth isolated current measurement in networked devices

Author(s): Uroš Platiše (Author), Mihael Mohorčič (Supervisor)

Year: 2022

Type: Doctoral dissertation

With the increasing use of electricity powered devices and processes in our daily lives, the need for the precise measurement of electrical currents across more than 15 decades from below nA to tens or hundreds of kA has become inevitable both for billing and more optimal energy distribution purposes as …

Freeze casting of hierarchically structured highly porous γ-Al2O3 monoliths

Author(s): Hermina Hudelja (Author), Andraž Kocjan (Supervisor)

Year: 2021

Type: Doctoral dissertation

Highly porous ceramic γ‒Al2O3 monoliths are important in many applications, e.g., catalysis, thermal insulation and adsorption, yet they still have a lot of unrecognized potential. There is a lot of incentive to employ simple and green fabrication processes for the preparation of such porous ceramic materials; however, many challenges, especially …

Processing of heavy-rare-earth-lean Nd-Fe-B permanent magnets for high-temptrature applications

Author(s): Matic Korent (Author), Kristina Žagar Soderžnik (Supervisor), Spomenka Kobe (Co-Supervisor)

Year: 2021

Type: Doctoral dissertation

Permanent magnets are materials that generate a magnetic field in free space without electricity or other external energy sources. They are essential components of modern technologies, used in many electrical devices. Nowadays, they are included in technology for renewable sources of energy, such as electrical vehicles, generators and wind turbines. …

Optical emission spectroscopy as a tool for monitoring cold atmospheric pressure plasma processes

Author(s): Andrea Jurov (Author), Uroš Cvelbar (Supervisor), Nataša Hojnik (Co-Supervisor)

Year: 2021

Type: Doctoral dissertation

Non-equilibrium atmospheric pressure plasmas are used in many areas, such as food and agriculture, plasma medicine, plasma surface modification, material synthesis and deposition. Because of their versatility, many plasma setups have been developed. Of greater interest are those that operate at atmospheric pressure, like atmospheric pressure plasma jets (APPJs). Regarding …

Plasma-enabled design of hybrid carbon nanostructures for energy storage applications

Author(s): Neelakandan Marath Santhosh (Author), Uroš Cvelbar (Supervisor), Gregor Filipič (Co-Supervisor)

Year: 2021

Type: Doctoral dissertation

Carbon, one of the most abundant materials in the earth crust, has gained research attention owing to its high structural stability, electrical conductivity, optical and thermal properties. Additionally, the possibility of tailoring carbon materials at nanoscales makes them promising materials for many applications, including energy storage, sensors, biomedical and electronics. …

Method for the determination of uranium isotope ratios and its application as a novel geochemical tracer

Author(s): Leja Rovan (Author), Marko Štrok (Supervisor)

Year: 2021

Type: Doctoral dissertation

U and Th isotopic composition have been proven to be a valuable tool in environmental science, oceanography, hydrology, geology, nuclear forensics, and science-based archaeology. These applications require simultaneous detection of both minor and major isotopes at high accuracy. Often, the amount of sample or concentration of U and Th are …

Correlation of the mechanical properties and wear behaviour with the microstructural characteristics of tool steels

Author(s): Božo Skela (Author), Bojan Podgornik (Supervisor), Marko Sedlaček (Co-Supervisor)

Year: 2021

Type: Doctoral dissertation

Wear is one of the key problems with many types of engineering components as it can limit their life expectancy. The same is true for tools and tool steels, which are the focus of this doctoral thesis. Tool-wear response and behaviour are closely related to a material’s final microstructure and …

Ostanki bisfenolov v vodnem okolju: pojavnost in kroženje

Author(s): Ana Kovačič (Author), Ester Heath (Supervisor), Tina Kosjek (Co-Supervisor)

Year: 2021

Type: Doctoral dissertation

Bisphenols are a group of industrial chemicals increasingly recognized as contaminants of emerging concern because of their presence in the environment and endocrine disrupting effects. They are used in the production of polycarbonate plastic, epoxy resins and thermal paper, in most cases without restriction. The global exception is bisphenol A, …