• 9-Acridinemethanamine and Acridine-9-Carboxaldehyde as Potential Fluorescence Lifetime pH Indicators 

      Totland, Christian; Thomas, Peter; Holst, Bodil; Akhtar, Naureen; Hovdenes, Jostein; Skodvin, Tore (Journal article; Peer reviewed, 2020)
      A significant challenge concerning the development of fluorescence lifetime (FL) based pH sensors is the paucity of fluorophores with sufficiently large FL variation with pH. Acridine is amongst the indicators with highest ...
    • AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space 

      El-Neaj, Yousef Abou; Alpigiani, Cristiano; Amairi-Pyka, Sana; Araújo, Henrique; Balaž, Antun; Bassi, Angelo; Bathe-Peters, Lars; Battelier, Baptiste; Belić, Aleksandar; Bentine, Elliot; Bernabeu, José; Bertoldi, Andrea; Bingham, Robert; Blas, Diego; Bolpasi, Vasiliki; Bongs, Kai; Bose, Sougato; Bouyer, Philippe; Bowcock, Themis; Bowden, William; Buchmueller, Oliver; Burrage, Clare; Calmet, Xavier; Canuel, Benjamin; Caramete, Laurentiu-Ioan; Carroll, Andrew; Cella, Giancarlo; Charmandaris, Vassilis; Chattopadhyay, Swapan; Chen, Xuzong; Chiofalo, Maria Luisa; Coleman, Jonathon; Cotter, Joseph; Cui, Yanou; Derevianko, Andrei; De Roeck, Albert; Djordjevic, Goran S.; Dornan, Peter; Doser, Michael; Drougkakis, Ioannis; Dunningham, Jacob; Dutan, Ioana; Easo, Sajan; Elertas, Gedminas; Ellis, John; El Sawy, Mai; Fassi, Farida; Felea, Daniel; Feng, Chen-Hao; Flack, Robert; Foot, Chris; Fuentes, Ivette; Gaaloul, Naceur; Gauguet, Alexandre; Geiger, Remi; Gibson, Valerie; Giudice, Gian; Goldwin, Jon; Grachov, Oleg; Graham, Peter W.; Grasso, Dario; van der Grinten, Maurits; Gündogan, Mustafa; Haehnelt, Martin G.; Harte, Tiffany; Hees, Aurélien; Hobson, Richard; Hogan, Jason; Holst, Bodil; Holynski, Michael; Kasevich, Mark; Kavanagh, Bradley J.; von Klitzing, Wolf; Kovachy, Tim; Krikler, Benjamin; Krutzik, Markus; Lewicki, Marek; Lien, Yu-Hung; Liu, Miaoyuan; Luciano, Giuseppe Gaetano; Magnon, Alain; Mahmoud, Mohammed Attia; Malik, Sarah; McCabe, Christopher; Mitchell, Jeremiah; Pahl, Julia; Pal, Debapriya; Pandey, Saurabh; Papazoglou, Dimitris; Paternostro, Mauro; Penning, Bjoern; Peters, Achim; Prevedelli, Marco; Puthiya-Veettil, Vishnupriya; Quenby, John; Rasel, Ernst; Ravenhall, Sean; Ringwood, Jack; Roura, Albert; Sabulsky, Dylan; Sameed, Muhammed; Sauer, Ben; Schäffer, Stefan Alaric; Schiller, Stephan; Schkolnik, Vladimir; Schlippert, Dennis; Schubert, Christian; Sfar, Haifa Rejeb; Shayeghi, Armin; Shipsey, Ian; Signorini, Carla; Singh, Yeshpal; Soares-Santos, Marcelle; Sorrentino, Fiodor; Sumner, Timothy; Tassis, Konstantinos; Tentindo, Silvia; Tino, Guglielmo Maria; Tinsley, Jonathan N.; Unwin, James; Valenzuela, Tristan; Vasilakis, Georgios; Vaskonen, Ville; Vogt, Christian; Webber-Date, Alex; Wenzlawski, André; Windpassinger, Patrick; Woltmann, Marian; Yazgan, Efe; Zhan, Ming-Sheng; Zou, Xinhao; Zupan, Jure (Journal article; Peer reviewed, 2020)
      We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of LISA and ...
    • Atomic resolution imaging of beryl: an investigation of the nano-channel occupation 

      Arivazhagan, V.; Schmitz, F.D.; Vullum, Per Erik; Van Helvoort, Antonius; Holst, Bodil (Peer reviewed; Journal article, 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 ...
    • Determining the fibrillar orientation of bast fibres with polarized light microscopy: the modified Herzog test (red plate test) explained 

      Haugan, Einar; Holst, Bodil (Peer reviewed; Journal article, 2013)
      The identification of bast fibre samples, in particular, bast fibres used in textiles, is an important issue in archaeology, criminology and other scientific fields. One of the characteristic features of bast fibres is ...
    • Fast resolution change in neutral helium atom microscopy 

      Flatabø, Ranveig; Eder, Sabrina Daniela; Ravn, Anders K; Samelin, Bjørn; Greve, Martin Møller; Reisinger, Thomas; Holst, Bodil (Peer reviewed; Journal article, 2018)
      In neutral helium atom microscopy, a beam of atoms is scanned across a surface. Though still in its infancy, neutral helium microscopy has seen a rapid development over the last few years. The inertness and low energy of ...
    • First experimental evidence of hop fibres in historical textiles 

      Skoglund, Git; Holst, Bodil; Lukesova, Hana (Journal article; Peer reviewed, 2020)
      Hop (Humulus lupulus) has been used in Scandinavia since at least the ninth century AD, as documented through archaeological findings and written, historical records. The written records are mainly focused on the use of ...
    • A giant reconstruction of α-quartz (0001) interpreted as three domains of nano dauphine twins 

      Eder, Sabrina Daniela; Fladischer, Katrin; Yeandel, S.R.; Lelarge, Anne; Parker, Stephen C.; Søndergård, Elin; Holst, Bodil (Peer reviewed; Journal article, 2015-10-08)
      Silica (SiO2) is one of the most common materials on Earth. The crystalline form α-quartz is the stable silica polymorph at ambient conditions although metastable forms exist. α-quartz is a piezoelectric material, it can ...
    • Is Cross‐Section Shape a Distinct Feature in Plant Fibre Identification? 

      Lukesova, Hana; Holst, Bodil (Journal article; Peer reviewed, 2021)
      Correct identification of textile fibres is an important issue in archaeology because the use of different materials can yield crucial information about the society that produced the textiles. Textiles made of plant and ...
    • Is It Hop? Identifying Hop Fibres in a European Historical Context 

      Lukešová, Hana; Andersen, Heidi Lie; Kolinova, M; Holst, Bodil (Peer reviewed; Journal article, 2019)
      Hop (Humulus lupulus L .) is an ancient perennial crop plant, native to the Northern Hemisphere. The archaeological evidence dates back to at least the sixth century ad in Europe. Hop has been used for beer brewing, in ...
    • Label-free impedance flow cytometry for nanotoxicity screening 

      Ostermann, Melanie; Sauter, Alexander; Xue, Ying; Birkeland, Eivind Salmorin; Schoelermann, Julia; Holst, Bodil; Cimpan, Mihaela Roxana (Peer reviewed; Journal article, 2020)
      The development of reliable and cost-efficient methods to assess the toxicity of nanomaterials (NMs) is critical for the proper identification of their impact on human health and for ensuring a safe progress of nanotechnology. ...
    • Light absorption and scattering of 40–170 nm gold nanoparticles on glass substrates 

      Flatabø, Ranveig; Holm, Vårin Renate Andvik; Eidsvåg, Håkon; Holst, Bodil; Greve, Martin Møller (Peer reviewed; Journal article, 2017)
      The localized surface plasmon resonance (LSPR) effect in metal nanoparticles is important for many applications ranging from detectors and sensors to photovoltaic devices. The LSPR wavelength is sensitive to the shape, ...
    • Nanometer-Resolution Mask Lithography with Matter Waves: Near-Field Binary Holography 

      Nesse, Torstein; Simonsen, Ingve; Holst, Bodil (Peer reviewed; Journal article, 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, ...
    • Nanostructuring of free-standing, dielectric membranes using electron-beam lithography 

      Grepstad, Jon Olav; Greve, Martin Møller; Reisinger, Thomas; Holst, Bodil (Peer reviewed; Journal article, 2013)
      Nanostructured dielectric membranes are used in several applications ranging from de Broglie matter-wave optical elements to photonic crystals. Precise pattern transfer and high aspect ratio structures are crucial for many ...
    • Nettle as a distinct Bronze Age textile plant 

      Bergfjord, Christian; Mannering, Ulla; Frei, Karin M.; Gleba, Margarita; Scharff, Annemette Bruselius; Skals, Irene; Heinemeier, Jan; Nosch, Marie-Louise; Holst, Bodil (Peer reviewed; Journal article, 2012-09-28)
      It is generally assumed that the production of plant fibre textiles in ancient Europe, especially woven textiles for clothing, was closely linked to the development of agriculture through the use of cultivated textile ...
    • Neutral atom and molecule focusing using a Fresnel zone plate 

      Reisinger, Thomas; Holst, Bodil (Peer reviewed; Journal article, 2008)
      Focusing of neutral atoms and molecules has several potential applications. The very first microscopy images using helium as an imaging probe were published earlier this year. Another possible application is to study the ...
    • Particle–wave discrimination in Poisson spot experiments 

      Reisinger, Thomas; Bracco, Gianangelo; Holst, Bodil (Peer reviewed; Journal article, 2011)
      Matter–wave interferometry has been used extensively over the last few years to demonstrate the quantum-mechanical wave nature of increasingly larger and more massive particles. We have recently suggested the use of the ...
    • Poisson’s spot with molecules 

      Reisinger, Thomas; Patel, Amil A.; Reingruber, Herbert; Fladischer, Katrin; Ernst, Wolfgang E.; Bracco, Gianangelo; Smith, Henry I.; Holst, Bodil (Peer reviewed; Journal article, 2009)
      In the Poisson-spot experiment, waves emanating from a source are blocked by a circular obstacle. Due to their positive on-axis interference an image of the source the Poisson spot is observed within the geometrical shadow ...
    • Retrieval practice of a hierarchical principle structure in university introductory physics: Making stronger students 

      Gjerde, Vegard; Holst, Bodil; Kolstø, Stein Dankert (Journal article; Peer reviewed, 2020)
      Introductory physics is taught to several hundred thousand university students every year. It is seen as especially difficult by many and the failure rate is often high. A relevant question is whether one can increase the ...
    • Temperature induced color change in gold nanoparticle arrays: Investigating the annealing effect on the localized surface plasmon resonance 

      Holm, Vårin Renate Andvik; Greve, Martin Møller; Holst, Bodil (Peer reviewed; Journal article, 2016)
      The localized surface plasmon resonance (LSPR) effect in metal nanoparticles is important for a range of applications, including photovoltaics and sensors. The actual LSPR effect is difficult to predict, because it can ...
    • 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 (Peer reviewed; Journal article, 2019-11-14)
      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 ...