Blar i NTNU Open på forfatter "Einarsrud, Mari-Ann"
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In situ characterisation for studying nucleation and growth of nanostructured materials and thin films during liquid-based synthesis
Bakken, Kristine; Grendal, Ola Gjønnes; Einarsrud, Mari-Ann (Peer reviewed; Journal article, 2022)Knowledge about the nucleation, growth, and formation mechanisms during materials synthesis using sol-gel and solution-based methods is important to design a material with desired properties. We used aqueous chemical ... -
In situ characterization during hydrothermal synthesis of alkali niobates
Skjærvø, Susanne Linn (Doctoral theses at NTNU;2018:318, Doctoral thesis, 2018) -
In situ Characterization of Ferroelectric Oxide Thin Films during Aqueous Chemical Solution Deposition
Bakken, Kristine (Doctoral theses at NTNU;2020:144, Doctoral thesis, 2020)Ferroelectric materials are used in a wide range of applications, including capacitors and non-linear optical devices. Utilization of ferroelectric thin films is especially desirable due to the possibility to tailor the ... -
In situ exsolution synthesis of composite cathodes for protonic ceramic fuel cells
Rioja-Monllor, Laura (Doctoral theses at NTNU;2018:127, Doctoral thesis, 2018)Protonic ceramic fuel cells (PCFCs) have the potential to operate with hydrogen as a fuel in an environmentally friendly manner with no emissions and high electrical efficiency. The lower operation temperature of PCFCs due ... -
In situ nanocomposites for high voltage insulation
Adnan, Mohammed Mostafa (Doctoral theses at NTNU;2022:36, Doctoral thesis, 2021)Rapid technological developments and the expanding scope of human activity has significantly increased energy demands. This has resulted in increasing requirements for insulation systems with improved dielectric, mechanical, ... -
In situ synthesis of epoxy nanocomposites with hierarchical surface-modified SiO2 clusters
Adnan, Mohammed Mostafa; Tveten, Erlend Grytli; Miranti, Rany; Hvidsten, Sverre; Ese, Marit-Helen Glomm; Glaum, Julia; Einarsrud, Mari-Ann (Peer reviewed; Journal article, 2020)Polymer nanocomposites are often produced using in situ approaches where an inorganic filler (as the dispersed phase) is synthesized directly in an organic matrix. Such an approach generally leads to improved dispersion and ... -
In situ synthesis of hybrid inorganic-polymer nanocomposites
Adnan, Mohammed Mostafa; Dalod, Antoine Robert Marie; Balci, Mustafa H; Glaum, Julia; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2018)Hybrid inorganic–polymer nanocomposites can be employed in diverse applications due to the potential combination of desired properties from both the organic and inorganic components. The use of novel bottom–up in situ ... -
In situ synthesis of titania and titanium based organicinorganic nanomaterials
Dalod, Antoine R. M. (Doctoral theses at NTNU;2017:230, Doctoral thesis, 2017)Inorganic and organic materials often exhibit opposite trends in properties (e.g. mechanical properties, thermal stability, hydrophobicity, optical properties) and the idea of combining these materials into new materials ... -
In situ X-ray diffraction and electrochemical impedance spectroscopy of a nanoporous Li2FeSiO4/C cathode during the initial charge/discharge cycle of a Li-ion battery
Zhou, Haitao; Einarsrud, Mari-Ann; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2013)Understanding of the structural evolution of the cathode during the charge/discharge processes is crucial to describe the Li insertion/de-insertion mechanisms in a Li-ion battery. An in situ XRD cell has been specially ... -
In situ X-ray diffraction studies during hydrothermal synthesis of ferroelectric materials
Ola Gjønnes Grendal (Doctoral theses at NTNU;2020:80, Doctoral thesis, 2020)Ferroelectric materials are an essential part of our technological society because of their dielectric and piezoelectric properties being utilized in capacitor, sensors and actuators. Nanostructured ferroelectric materials ... -
In situ X-ray diffraction studies of the crystallization of K0. 5Na0. 5NbO3 powders and thin films from an aqueous synthesis route
Bakken, Kristine; Gaukås, Nikolai Helth; Grendal, Ola Gjønnes; Blichfeld, Anders Bank; Tominaka, Satoshi; Ohara, Koji; Chernyshov, Dmitry; Glaum, Julia; Grande, Tor; Einarsrud, Mari-Ann (Peer reviewed; Journal article, 2021)Aqueous chemical solution deposition is a promising route for ferroelectric K0.5Na0.5NbO3 (KNN) thin films, requiring a stable precursor solution with complexed Nb5+. Here, we report on the local structure of Nb-complexes ... -
In Vitro Biocompatibility of Piezoelectric K<inf>0.5</inf>Na<inf>0.5</inf>NbO<inf>3</inf>Thin Films on Platinized Silicon Substrates
Gaukås, Nikolai Helth; Huynh, Quy-Susan; Pratap, Anishchal A.; Einarsrud, Mari-Ann; Grande, Tor; Holsinger, R. M. Damian; Glaum, Julia (Peer reviewed; Journal article, 2020)Lead-free piezoelectric ceramics like K0.5Na0.5NbO3 (KNN) represent an emerging class of biomaterials for medical technology, as they can be used as components in implantable microelectromechanical systems (MEMS) and ... -
In-plane Ferroelectricity in Barium Titanate Films
Ræder, Trygve Magnus (Doctoral theses at NTNU;2020:201, Doctoral thesis, 2020)Ferroelectric materials are irreplaceable materials in electronics used everywhere in the modern society. The ferroelectric perovskites are the most widely used class of ferroelectric materials, and the use is dominated ... -
In-situ structural investigations of ferroelasticity in soft and hard rhombohedral and tetragonal PZT
Morozov, Maxim; Einarsrud, Mari-Ann; Tolchard, Julian R.; Kyle, Webber; Dragan, Damjanovic; Grande, Tor; Philipp, Geiger (Journal article; Peer reviewed, 2015-10-28)Despite the technological importance of hard and soft PZT, Pb(Zr,Ti)O3, ceramics, the mechanisms of ferroelectric hardening and softening remain widely discussed in the literature. The hardening and softening phenomena ... -
Influence of Artificial Porosity on Piezoelectric Behavior of (K,Na)NbO3 (KNN) Bulk Ceramics
Ommedal, Mari Berge (Master thesis, 2016)The influence of artificial porosity on the piezoelectric behaviour of KNN was studied for possible biomedical applications. A "piezoelectric effect" observed in bone is expected to trigger bone growth and healing. Therefore, ... -
Kinetics during hydrothermal synthesis of nanosized KxNa1-xNbO3
Skjærvø, Susanne Linn; Wells, Kristin Høydalsvik; Van Beek, Wouter; Grande, Tor; Einarsrud, Mari-Ann (Journal article, 2018)Hydrothermal synthesis is an efficient method of making nanosized functional oxide materials, and it has also been used to synthesize KxNa1−xNbO3 solid solution, a promising lead-free piezoelectric material. However, the ... -
Kompleksdannere under våtkjemisk syntese av oksider
Skjærvø, Susanne Linn (Master thesis, 2013)Effekten av ulike komplekseringsmidler i den modifiserte Pechini-metoden har blitt studert ved å benytte malon-, eple- og vinsyre under syntesen CuAlO2 med delafossittstruktur og eple- og vinsyre for NaLa(WO4)(MoO4) med ... -
Lead-Free Ferroelectric KNN Films for Biomedical Applications
Gaukås, Nikolai Helth (Doctoral theses at NTNU;2020:246, Doctoral thesis, 2020)Ferroelectric materials are utilized in a wide range of different electronic devices throughout our modern society, including all kinds of consumer electronics, ultrasound equipment, minimally invasive surgical tools and ... -
Lead-free piezoelectric Materials based on Silver Niobate
Walø, Stine Lund (Master thesis, 2013)Studies done on base material AgNbO3 reveals that a large polarization, which is comparable to values reported for PZT, occurs under application of a high electric field. Density functional calculations show that solid ... -
Lead-free piezoelectric materials for medical application
Dale, Silje Marie (Master thesis, 2018)In this work, K0.5Na0.5NbO3, (KNN) and K0.495Na0.495Ca0.005NbO3 thin films for biomedical applications have been prepared from an aqueous precursor solutions with 2.5 or 5.0 mol% of alkali excess. Ca2+ was introduced as ...