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Atomic force microscopy studies of wool fibre structures
(Master thesis, 2009) -
Atomic Resolution 3-D Reconstruction of Crystal Grain Boundaries
(Master thesis, 2018)Grain boundaries are typical crystal defects, which to a large extent determines the macroscopic properties of the material. In order to control these properties and design new materials, detailed knowledge about the atomic ... -
Atomic resolution imaging of beryl: an investigation of the nano-channel occupation
(Journal article; Peer reviewed, 2016)Beryl in different varieties (emerald, aquamarine, heliodor etc.) displays a wide range of colours that have fascinated humans throughout history. Beryl is a hexagonal cyclo-silicate (ring-silicate) with channels going ... -
Atomic Structure of Hardening Precipitates in Al-Mg-Si Alloys: Influence of Minor Additions of Cu and Zn
(Peer reviewed; Journal article, 2023)Shifting toward sustainability and low carbon emission necessitates recycling. Aluminum alloys can be recycled from postconsumer scrap with approximately 5% of the energy needed to produce the same amount of primary alloys. ... -
Atomic structure of solute clusters in Al-Zn-Mg alloys
(Journal article; Peer reviewed, 2021)Scanning transmission electron microscopy imaging of Al–Zn–Mg alloys has provided new information on the atomic structures of solute rich clusters forming from a supersaturated solid solution at low temperatures. A unique ... -
Atomic structures of precipitates in Al–Mg–Si alloys with small additions of other elements
(Journal article; Peer reviewed, 2018)In Al–Mg–Si alloys, additions of only a few weight percent of Mg and Si enable formation of hardening precipitates during heat treatment. The precipitation is complex and is influenced by chemical compositions and ... -
Atomic-resolution chemical mapping of ordered precipitates in Al alloys using energy-dispersive X-ray spectroscopy
(Journal article, 2017)Scanning transmission electron microscopy (STEM) coupled with energy-dispersive X-ray spectroscopy (EDS) is a common technique for chemical mapping in thin samples. Obtaining high-resolution elemental maps in the STEM is ... -
Atomic-resolution electron energy loss studies of precipitates in an Al-Mg-Si-Cu-Ag alloy
(Journal article, 2014)Aberration-corrected scanning transmission electron microscopy combined with electron energy loss spectroscopy has been used to determine the distribution of Cu and Ag atomic columns of precipitates in an Al–Mg–Si–Cu–Ag ... -
Atomic-resolution elemental mapping of precipitates in a 7449 aluminium alloy
(Journal article, 2014)The high-strength weldable 7xxx series of aluminium alloys are of great importance to the aeronautics industry. Only recently, the complex structures of the AlZnMg hardening precipitates have been solved by HAADFSTEM imaging ... -
Atomic-scale 3D imaging of individual dopant atoms in an oxide semiconductor
(Peer reviewed; Journal article, 2022)The physical properties of semiconductors are controlled by chemical doping. In oxide semiconductors, small variations in the density of dopant atoms can completely change the local electric and magnetic responses caused ... -
Atomistic details of precipitates in lean Al–Mg–Si alloys with trace additions of Ag and Ge studied by HAADF-STEM and DFT
(Journal article, 2017)Bonding energies and volume misfits for alloying elements and vacancies in multicomponent Al–Mg–Si alloys have been calculated using density functional theory (DFT). A detailed atomic scale analysis has been done for ... -
Atomistic Implications of Stacking Fault Energy on Dislocation - Void Interactions
(Master thesis, 2012)Irradiation hardening due to voids can be a significant result of radiation damage in metals, but treatment of this by elasticity theory of dislocations is difficult when the mechanisms controlling the obstacle strength ... -
Atomistic modeling of the Al-Mg-Si alloy system
(Dr. ingeniøravhandling, 0809-103X; 2003:28, Doctoral thesis, 2003)The atomic and electronic structure of bulk crystalline and solid state phases related to Al-Mg-Si (6xxx) alloys have been studied using Density Functional Theory (DFT) and total energy Tight Binding (TB). We present a ... -
Atomistic Scale Modelling of Defects in Aluminium Alloys
(Doctoral theses at NTNU;2020:400, Doctoral thesis, 2020)«Deformasjoner som en ser når metall bøyer seg, er en kollektiv bevegelse av små linjedefekter i atomstrukturen.» Dette sitatet oppsummerer temaet til doktorgradsarbeidet som handler om hvordan atomer i aluminium oppfører ... -
Atomistic simulations of early stage clusters in Al-Mg alloys
(Peer reviewed; Journal article, 2019)The Cluster Expansion formalism based on Density Functional Theory (DFT) simulation data has been applied for AlMg alloys with high accuracy ( meV/atom). The atomistic simulations are used to model the AlMg phase diagram, ... -
Atomistic simulations of early stage clusters in AlMg alloys
(Journal article; Peer reviewed, 2018)The Cluster Expansion formalism based on Density Functional Theory (DFT) simulation data has been applied for AlMg alloys with high accuracy ( meV/atom). The atomistic simulations are used to model the AlMg phase diagram, ... -
Atomistic simulations of thermodynamics and dissolution of iron-silicon phases in iron encasements
(Master thesis, 2019)Målet med denne masteroppgaven er å bruke tetthets-funksjonal-teori sammen med en cluster-ekspansjons-metode, slik at jern-silisium legeringer på et statisk kubisk romsentrert gitter kan bli studert ved bruk av Monte ... -
Attenuation correction in PET/MR: A performance assessment of UTE-based and Dixon-based methods for PET attenuation correction
(Master thesis, 2014)Hybrid positron emission tomography/magnetic resonance imaging (PET/MR) scanners are one of the latest tools available in the field of medical imaging, and are expected to outperform the well-established PET/X-ray computed ... -
Augmenting drug-carrier compatibility improves tumour nanotherapy efficacy
(Journal article; Peer reviewed, 2016)A major goal of cancer nanotherapy is to use nanoparticles as carriers for targeted delivery of anti-tumour agents. The drug–carrier association after intravenous administration is essential for efficient drug delivery to ... -
Aura MLS observations of the westward-propagating s=1, 16-day planetary wave in the stratosphere, mesosphere and lower thermosphere
(Journal article; Peer reviewed, 2011)The Microwave Limb Sounder (MLS) on the Aura satellite has been used to measure temperatures in the stratosphere, mesosphere and lower thermosphere. The data used here are from August 2004 to December 2010 and latitudes ...