Browsing NTNU Open by Author "Wells, Justin"
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A Spectroscopic Study of in situ Magnetic Doping of Novel Layered Materials for Spintronics
Hunvik, Kristoffer William (Master thesis, 2016)MoS2 is a layered material in the family of the transition metal dicalchogenides (TMDCs), which hosts interesting spin physics. Even though the TMDCs are nonmagnetic in their bulk form, a local breaking of inversion symmetry ... -
An investigation into the GW plus Cumulant Expansion
Kvindesland, Mons (Master thesis, 2019)Den skjermede Green fuksjonen plus cumulant utvideleses tilnærmingen er en relativt ny approksimasjonsmetode som ble først brukt på 1990-tallet. Det er en approksimasjonsteori som gir relativt nøyaktige resultater for ... -
An X-ray Photoelectron Spectroscopy study of DySx created by depositing Dy on MoS2 - For application in spintronics
Christensen, Magnus Sebastian (Master thesis, 2017)There are many interesting materials under research for spintronics today, including the Transition Metal Dichalcogenides (TMDCs). They are particularly interesting because they collectively host materials which are ... -
Cleaning methods and aluminium growth on yttrium iron garnet
Sætren, Tord (Master thesis, 2019)Å forstå tynn film vekst på yttrium jern granat(YIG) er eit vikitig steg å ta før ein kan studere magnon-elektronvekselvikning for å koble elektronikk og spinntronikk. Magnon-elektronvekselvirkning på eit metall-magnetiskisolator ... -
Degradation of the chemotherapy drug 5-fluorouracil on medical-grade silver surfaces
Risinggård, Helene Kjær; Cooil, Simon Phillip; Mazzola, Federico; Hu, Di; Kjærvik, Marit; Østli, Elise Ramleth; Patil, Nilesh; Preobrajenski, Alexei; Evans, Andrew; Breiby, Dag Werner; Trinh, Thuat; Wells, Justin (Journal article; Peer reviewed, 2018) -
Degradation of the Chemotherapy Drug 5-Fluorouracil on Surfaces
Kjær, Helene (Master thesis, 2015)The catalytic effect of different materials concerning degradation of the chemo therapy drug 5-Fluorouracil (5-Fu) has been studied using X-ray Photoelectron Spectroscopy and X-ray Absorption Spectroscopy. The materials ... -
Design of a 5-axis Manipulator for Use in Angle-Resolved Photoemission Spectroscopy
Kjeken, Eirik (Master thesis, 2016)The design of a 5-axis manipulator for use in Angle-Resolved Photoemission Spectroscopy (ARPES) is presented along with an outline of the specific challenges it was designed to adress. The theory and nomenclature of X-ray ... -
Effect on band gap of ligands-exchange in solution processed CZTS thin films, analyzed through PES study
Guglielminotti, Arianna (Master thesis, 2019)In this work, Photoelectron Spectroscopy (PES) was employed to analyse elemental composition and energy band gap of Cu2ZnSnS4 (CZTS) stabilized nanoink deposited films, with the aim of understanding the behavior and effects ... -
Engineering Quantum States in δ-doped Semiconductors
Holt, Ann Julie Utne (Master thesis, 2017)The effect of quantum confinement, creating a two-dimensional electron gas was studied using angle-resolved photoemission spectroscopy. This was done by creating phosphorus δ-layers in silicon, varying in thickness from ... -
Exploring Electronic Confinement in Si:P δ-layers
Nyborg, Thomas (Master thesis, 2018)In this thesis, the electronic states of a quantum well system in silicon is investigated. The confinement is induced by a thin dopant profile called a delta-layer, creating an effective two-dimensional metallic region ... -
Fabrication of Diffractive Honeycomb Structures on Silicon Using Photolithography and Maskless Aligner and Investigation of Optical and Electrical Properties of the Structures
Danielsen, Jon Anders (Master thesis, 2018)Surface texturing is an important method for increasing absorption of light in solar cells. This is done by creating surface structures that increase the optical path-length of photons within the cell, through light-trapping ... -
Fundamental Theories and Methodologies for Assessing Radiation Hardness in Hydrogen-Terminated Diamond
Rieker, Vilde Flognfeldt (Master thesis, 2018)The origin of conductivity in hydrogen terminated diamond, and the effect of MoO3 deposition is explained. Further, the various effects that can be induced upon particle irradiation and the mechanisms behind them is ... -
Investigation of Unoccupied Electronic Bands in Graphene
Hadamek, Tomas (Master thesis, 2018)In recent years, a lot attention has been paid to various two-dimensional materials due to their unique properties stemming from the spacial refinement of one of the material's dimensions. Regardless of the incredible ... -
Iron-Mediated Growth of Graphene on SiC for Radiation Detection
Götz, Adam (Master thesis, 2017)A proposed radiation sensor exploits graphene's high electron mobility and sensitivity to miniscule electric fields to attain a novel approach for radiation detection. Realizing such a sensor is contingent on controlled ... -
Low-Temperature Growth of Graphene on a Semiconductor
Røst, Håkon Ivarssønn; Chellappan, Rajesh Kumar; Strand, Frode Sneve; Grubišić-Čabo, Antonija; Reed, Benjamen P.; Prieto, Mauricio J.; Tǎnase, Liviu C.; Caldas, Lucas de Souza; Wongpinij, Thipusa; Euaruksakul, Chanan; Schmidt, Thomas; Tadich, Anton; Cowie, Bruce; Li, Zheshen; Cooil, Simon; Wells, Justin (Peer reviewed; Journal article, 2021)The industrial realization of graphene has so far been limited by challenges related to the quality, reproducibility, and high process temperatures required to manufacture graphene on suitable substrates. We demonstrate ... -
Natural Dyes as Candidate Materials for Organic Solar Cells - An Optical, Electronic and Structural Characterisation
Richter, Annika (Master thesis, 2018)Natural dyes strongly absorbing light in the visible spectrum are appealing ma- terials for the use in organic solar cells, due to their direct availability from nature. An especially interesting potential application ... -
Novel Studies of the Spectroscopic Signature of the Skin Cancer-causing Cyclobutane Cross-link in DNA
Thiem, Lukas (Master thesis, 2018)1,2,3,4-Cyclobutanetetracarboxylic acid was chosen as a drastically simplified model of the cyclobutane pyrimidine dimer in DNA. Its interaction with cisplatin was studied by XPS i.a. at the synchrotron light source ASTRID2 ... -
On-surface manipulation of atom substitution between cobalt phthalocyanine and the Cu(111) substrate
Shen, Kongchao; Narsu, Bai; Ji, Gengwu; Sun, Haoliang; Hu, Jinbang; Liang, Zhaofeng; Gao, Xingyu; Li, Haiyang; Li, Zheshen; Song, Bo; Jiang, Zheng; Huang, Han; Wells, Justin; Song, Fei (Journal article; Peer reviewed, 2017)On-surface fabrication of controllable nanostructures is an appealing topic in the field of molecular electronics. Herein, the adsorption of cobalt phthalocyanine (CoPc) on a Cu(111) surface is investigated utilizing a ... -
Phonon-mediated superconductivity in doped monolayer materials
Thingstad, Even; Kamra, Akashdeep; Wells, Justin; Sudbø, Asle (Peer reviewed; Journal article, 2020)Insight into why superconductivity in pristine and doped monolayer graphene seems strongly suppressed has been central for the recent years' various creative approaches to realize superconductivity in graphene and graphene-like ... -
Photochemistry of a Nucleobase Relevant to the Formation of Malignant Melanoma - Using Spectroscopic Techniques to Study the UV-Induced Damage of Thymine on MoS2
Vinje, Jakob (Master thesis, 2016)Paring of nucleobases in deoxyribonucleic acid and the subsequent transcription of genes is arguably two of the most important processes for life. When subject to ultra violet (UV) light, one of the nucleobases, thymine, ...