Browsing NTNU Open by Author "Holst, Bodil"
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Atomic resolution imaging of beryl: an investigation of the nano-channel occupation
Van Helvoort, Antonius; Holst, Bodil; Schmitz, F.D.; Arivazhagan, V.; Vullum, Per Erik (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 resolution transmission electron microscopy visualisation of channel occupancy in beryl in different crystallographic directions
Hanser, C. S.; Vullum, Per Erik; Van Helvoort, Antonius; Schmitz, F.D.; Häger, Tobias; Botcharnikov, R; Holst, Bodil (Journal article; Peer reviewed, 2024)The causes of colour in beryl have been a research topic for decades. For some varieties, such as emerald (green, coloured by Cr3+ and/or V3+), the main cause of colour is substitutions by metal atoms within the framework. ... -
Does the Boson Peak Exist in 2D Materials?
Tømterud, Martin (Master thesis, 2021)Glass og andre uordnede materialer som polymerer er umåtelig viktige i det moderne samfunn. Å forstå deres egenskaper er derfor essensielt. Et fenomen som ofte er observert i bulk i glass er bosontoppen, en overflod av ... -
Finite-size limitations on quality factor of guided resonance modes in 2D photonic crystals
Grepstad, Jon Olav; Greve, Martin Møller; Holst, Bodil; Johansen, Ib-Rune; Solgaard, Olav; Sudbø, Aasmund (Journal article; Peer reviewed, 2013)High-Q guided resonance modes in two-dimensional photonic crystals, enable high field intensity in small volumes that can be exploited to realize high performance sensors. We show through simulations and experiments how ... -
Material properties particularly suited to be measured with helium scattering: selected examples from 2D materials, van der Waals heterostructures, glassy materials, catalytic substrates, topological insulators and superconducting radio frequency materials
Holst, Bodil; Alexandrowicz, Gil; Avidor, Nadav; Benedek, Giorgio; Bracco, Gianangelo; Ernst, Wolfgang E.; Farias, Daniel; Jardine, Andrew P.; Lefmann, Kim; Manson, Joseph R.; Marquardt, Roberto; Artés, Salvador Miret; Sibener, Steven J.; Wells, Justin W; Tamtögl, Anton; Allison, William (Peer reviewed; Journal article, 2021)Helium Atom Scattering (HAS) and Helium Spin-Echo scattering (HeSE), together helium scattering, are well established, but non-commercial surface science techniques. They are characterised by the beam inertness and very ... -
Nanometer-Resolution Mask Lithography with Matter Waves: Near-Field Binary Holography
Nesse, Torstein; Simonsen, Ingve; Holst, Bodil (Journal article; Peer reviewed, 2019)Mask-based pattern generation is a crucial step in microchip production. The next-generation extreme-ultraviolet- (EUV) lithography instruments with a wavelength of 13.5 nm are currently under development. In principle, ... -
Observation of the boson peak in a two-dimensional material
Tømterud, Martin; Eder, Sabrina Daniela; Büchner, Christin; Wondraczek, Lothar; Simonsen, Ingve; Schirmacher, Walter; Manson, Joseph R.; Holst, Bodil (Peer reviewed; Journal article, 2023)The boson peak is an excess in the phonon vibrational density of states relative to the Debye model. It has been observed in a wide range of amorphous materials, from inorganic glasses to polymers. Two-dimensional random ... -
Phonon-Mediated Quasiparticle Lifetime Renormalizations in Few-Layer Hexagonal Boron Nitride
Røst, Håkon; Cooil, Simon Phillip; Åsland, Anna Cecilie; Hu, Jinbang; Ali, Ayaz; Taniguchi, Takashi; Watanabe, Kenji; Belle, Branson Delano; Holst, Bodil; Sadowski, Jerzy; Mazzola, Federico; Wells, Justin William (Peer reviewed; Journal article, 2023)Understanding the collective behavior of the quasiparticles in solid-state systems underpins the field of non-volatile electronics, including the opportunity to control many-body effects for well-desired physical phenomena ... -
The use of surfactant-filled mesoporous silica as an immobilising medium for a fluorescence lifetime pH indicator, providing long-term calibration stability
Totland, Christian; Thomas, Peter; Holst, Bodil; Hovdenes, Jostein; Akhtar, Naureen; Skodvin, Tore (Journal article; Peer reviewed, 2019)Surfactant filled mesoporous silica is applied as a matrix for immobilizing the fluorescence lifetime pH-indicator acridine. We demonstrate that this type of encapsulation provides a stable and uniform chemical environment ... -
Wave scattering theory applied to inversion and design
Nesse, Torstein (Doctoral theses at NTNU;2018:310, Doctoral thesis, 2018)The scattering of waves from objects can be used as a tool for both characterization and manipulation. The way waves interact and scatter from objects can give us information about their structure and composition. Additionally, ...