Anja Røyne

• Campaña Perilla, Ana Lucia; Joudeh, Nadeem; Høyer, Henrik; Røyne, Anja; Linke, Dirk & Mikheenko, Pavlo (2020). Probing van der Waals and magnetic forces in bacteria with magnetic nanoparticles, In  2020 IEEE 10th International Conference on “Nanomaterials: Applications & Properties” (NAP – 2020).  IEEE.  ISBN 978-1-7281-8506-4.  Article.  s 01NSSA03-1 - 01NSSA03-5 Vis sammendrag

  Bioinspired metal-based nanoparticles have potential uses in many applications, but before a possible commercial exploitation, it is important to clarify the pathways of their production and deposition inside the organisms, for example in bacteria. The technique of magnetic force microscopy (MFM) could be used to evaluate the nanoparticles magnetic properties, in addition to allowing tracing their location inside or outside of bacteria, which could help to understand pathways of their biosynthesis. In this work, using MFM and analyzing the interaction of magnetic tip with nanoparticles and bacteria imbedded in resin at different heights above the surface, and comparing gradients of forces recorded by magnetic and non-magnetic tips, a condition was found, which allows to measure pure magnetic response of Pd-Fe nanoparticles. For these nanoparticles, the interplay between magnetic and van der Waals forces is described at small distances to the surface. Experimental data are compared with simulations, based on the calculation of the distribution of magnetic field around a nanoparticle, which defines magnetic force acting on the MFM tip.

• Claxton, James; Joudeh, Nadeem; Røyne, Anja; Linke, Dirk & Mikheenko, Pavlo (2020). Sequential magnetic mapping of bacteria loaded with Pd-Fe nanoparticles, In  2020 IEEE 10th International Conference on “Nanomaterials: Applications & Properties” (NAP – 2020).  IEEE.  ISBN 978-1-7281-8506-4.  Article.  s 01NIC01-1 - 01NIC01-5 Vis sammendrag

  Magnetic nanoparticles are of widespread use in nanotechnology. One of the most unusual are magnetic palladium nanoparticles that combine magnetism with high catalytic activity. These nanoparticles could be obtained biologically by exposing bacteria to a palladium salt. Due to their small size and weak magnetism, however, it is challenging to measure their magnetic properties. One of the solutions to enhance their magnetism is to incorporate a small amount of iron atoms into them. After this procedure, the nanoparticles together with bacteria can be embedded in resin and characterized by the technique of magnetic force microscopy. This technique allows imaging cross-sections of the bacteria with nanoparticles, but cannot give information from the depth of the sample. Here we report on an approach partially solving this problem. Its novelty lies in measurements of consecutive thin slices of resin, which allows mapping cross-sections of individual bacteria and different parts of the material surrounding the same bacterium. An interesting observed feature is the formation of magnetic chains of nanoparticles outside of the bacteria.

• Dziadkowiec, Joanna & Røyne, Anja (2020). Nanoscale Forces between Basal Mica Surfaces in Dicarboxylic Acid Solutions: Implications for Clay Aggregation in the Presence of Soluble Organic Acids. Langmuir.  ISSN 0743-7463.  36(49), s 14978- 14990 . doi: 10.1021/acs.langmuir.0c02290
• Zehner, Jennifer Simone; Røyne, Anja; Wentzel, Alexander & Sikorski, Pawel (2020). Microbial-induced calcium carbonate precipitation: An experimental toolbox for in situ and real time investigation of micro-scale pH evolution. RSC Advances.  ISSN 2046-2069.  10(35), s 20485- 20493 . doi: 10.1039/D0RA03897K Fulltekst i vitenarkiv. Vis sammendrag

  Concrete is the second most consumed product by humans, after water. However, the production of conventional concrete causes more than 5% of anthropogenic CO2 emissions and therefore there is a need for emission-reduced construction materials. One method to produce a solid, concrete-like construction material is microbial-induced calcium carbonate precipitation (MICP). To get a better understanding of MICP it is important to be able to follow local pH changes in dissolution and precipitation processes of CaCO3. In this work we present a new method to study processes of MICP at the micro-scale in situ and in real time. We present two different methods to monitor the pH changes during the precipitation process of CaCO3. In the first method, the average pH of small sample volumes is measured in real time, and pH changes are subsequently correlated with processes in the sample by comparing to optical microscope results. The second method is introduced to follow local pH changes at a grain scale in situ and in real time. Furthermore, local pH changes during the dissolution of CaCO3 crystals are monitored. We demonstrate that these two methods are powerful tools to investigate the pH changes for both MICP precipitation and CaCO3 dissolution for knowledge-based improvement of MICP-based material properties.

• Dziadkowiec, Joanna; Zareeipolgardani, Bahareh; Dysthe, Dag Kristian & Røyne, Anja (2019). Nucleation in confinement generates long-range repulsion between rough calcite surfaces. Scientific Reports.  ISSN 2045-2322.  9 . doi: 10.1038/s41598-019-45163-6 Fulltekst i vitenarkiv.
• Myhr, Anders; Røyne, Frida; Brandtsegg, Andreas Saur; Bjerkseter, Catho; Throne-Holst, Harald; Borch, Anita; Wentzel, Alexander & Røyne, Anja (2019). Towards a low CO2 emission building material employing bacterial metabolism (2/2): Prospects for global warming potential reduction in the concrete industry. PLOS ONE.  ISSN 1932-6203.  14(4) . doi: 10.1371/journal.pone.0208643 Fulltekst i vitenarkiv.
• Røyne, Anja; Phua, Yi Jing; Le, Simone Balzer; Eikjeland, Ina Grosås; Josefsen, Kjell Domaas; Markussen, Sidsel; Myhr, Anders; Throne-Holst, Harald; Sikorski, Pawel & Wentzel, Alexander (2019). Towards a low CO2 emission building material employing bacterial metabolism (1/2): The bacterial system and prototype production. PLOS ONE.  ISSN 1932-6203.  14(4) . doi: 10.1371/journal.pone.0212990 Fulltekst i vitenarkiv.
• Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja (2018). Surface Forces Apparatus Measurements of Interactions between Rough and Reactive Calcite Surfaces. Langmuir.  ISSN 0743-7463.  34((25)), s 7248- 7263 . doi: 10.1021/acs.langmuir.8b00797 Fulltekst i vitenarkiv.
• Javadi, Shaghayegh & Røyne, Anja (2018). Adhesive forces between two cleaved calcite surfaces in NaCl solutions: The importance of ionic strength and normal loading. Journal of Colloid and Interface Science.  ISSN 0021-9797.  532, s 605- 613 . doi: 10.1016/j.jcis.2018.08.027 Fulltekst i vitenarkiv.
• Li, Lei; Sanchez, Jesus Rodriguez; Kohler, Felix; Røyne, Anja & Dysthe, Dag Kristian (2018). Microfluidic control of nucleation and growth of CaCO3. Crystal Growth & Design.  ISSN 1528-7483.  18(8), s 4528- 4535 . doi: 10.1021/acs.cgd.8b00508 Fulltekst i vitenarkiv.
• Phua, Yi Jing & Røyne, Anja (2018). Bio-cementation through controlled dissolution and recrystallization of calcium carbonate. Construction and Building Materials.  ISSN 0950-0618.  167, s 657- 668 . doi: 10.1016/j.conbuildmat.2018.02.059 Fulltekst i vitenarkiv.
• Renard, Francois; Røyne, Anja & Putnis, Christine V (2018). Timescales of interface-coupled dissolution-precipitation reactions on carbonates. Geoscience Frontiers.  ISSN 1674-9871.  10, s 10- 27 . doi: 10.1016/j.gsf.2018.02.013 Fulltekst i vitenarkiv.
• Li, Lei; Kohler, Felix; Røyne, Anja & Dysthe, Dag Kristian (2017). Growth of calcite in confinement. Crystals.  ISSN 2073-4352.  7(12) . doi: 10.3390/cryst7120361
• Pluymakers, Anne Marie Henriette & Røyne, Anja (2017). Nanograin formation and reaction-induced fracturing due to decarbonation: Implications for the microstructures of fault mirrors. Earth and Planetary Science Letters.  ISSN 0012-821X.  476, s 59- 68 . doi: 10.1016/j.epsl.2017.08.001 Fulltekst i vitenarkiv.
• Bergsaker, Anne Schad; Røyne, Anja; Ougier-Simonin, Audrey; Aubry, Jérôme & Renard, Francois Marie Paul L (2016). The effect of fluid composition, salinity, and acidity on subcritical crack growth in calcite crystals. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(3), s 1631- 1651 . doi: 10.1002/2015JB012723 Fulltekst i vitenarkiv.
• Høgberget, Jørgen; Røyne, Anja; Dysthe, Dag Kristian & Jettestuen, Espen (2016). Microscopic modeling of confined crystal growth and dissolution. Physical review. E.  ISSN 2470-0045.  94(2) . doi: 10.1103/PhysRevE.94.023005

Se alle arbeider i Cristin

• Røyne, Anja (2020). Fysikk - enkelt forklart. Universitetsforlaget.  ISBN 9788215034454.  159 s.
• Røyne, Anja (2020). Varm klode, kaldt hode. Løsninger på klimakrisen.. Kagge Forlag AS.  ISBN 9788248926344.  231 s.
• Røyne, Anja (2018). Menneskets grunnstoffer. Byggeklossene vi og verden er laget av. Kagge Forlag AS.  ISBN 978-82-489-2241-4.  177 s.

Se alle arbeider i Cristin

• Campaña Perilla, Ana Lucia; Joudeh, Nadeem; Høyer, Henrik; Røyne, Anja; Linke, Dirk & Mikheenko, Pavlo (2020). Probing van der Waals and magnetic forces in bacteria with magnetic nanoparticles. Vis sammendrag

  Bioinspired metal-based nanoparticles have potential uses in many applications, but before a possible commercial exploitation, it is important to clarify the pathways of their production and deposition inside the organisms, for example in bacteria. The technique of magnetic force microscopy (MFM) could be used to evaluate the nanoparticles magnetic properties, in addition to allowing tracing their location inside or outside of bacteria, which could help to understand pathways of their biosynthesis. In this work, using MFM and analyzing the interaction of magnetic tip with nanoparticles and bacteria imbedded in resin at different heights above the surface, and comparing gradients of forces recorded by magnetic and non-magnetic tips, a condition was found, which allows to measure pure magnetic response of Pd-Fe nanoparticles. For these nanoparticles, the interplay between magnetic and van der Waals forces is described at small distances to the surface. Experimental data are compared with simulations, based on the calculation of the distribution of magnetic field around a nanoparticle, which defines magnetic force acting on the MFM tip.

• Claxton, James; Joudeh, Nadeem; Røyne, Anja; Linke, Dirk & Mikheenko, Pavlo (2020). Sequential magnetic mapping of bacteria loaded with Pd-Fe nanoparticles. Vis sammendrag

  Magnetic nanoparticles are of widespread use in nanotechnology. One of the most unusual are magnetic palladium nanoparticles that combine magnetism with high catalytic activity. These nanoparticles could be obtained biologically by exposing bacteria to a palladium salt. Due to their small size and weak magnetism, however, it is challenging to measure their magnetic properties. One of the solutions to enhance their magnetism is to incorporate a small amount of iron atoms into them. After this procedure, the nanoparticles together with bacteria can be embedded in resin and characterized by the technique of magnetic force microscopy. This technique allows imaging cross-sections of the bacteria with nanoparticles, but cannot give information from the depth of the sample. Here we report on an approach partially solving this problem. Its novelty lies in measurements of consecutive thin slices of resin, which allows mapping cross-sections of individual bacteria and different parts of the material surrounding the same bacterium. An interesting observed feature is the formation of magnetic chains of nanoparticles outside of the bacteria.

• Dziadkowiec, Joanna; Cheng, Hsiu-Wei; Røyne, Anja & Valtiner, Markus (2020). Interactions between reactive mineral surfaces studied with the surface forces apparatus.
• Dziadkowiec, Joanna; Cheng, Hsiu-Wei; Røyne, Anja & Valtiner, Markus (2020). Interfacial processes at dissimilarly charged mineral surfaces in contact – a surface forces apparatus study.
• Dziadkowiec, Joanna; Zareeipolgardani, Bahareh; Dysthe, Dag Kristian & Røyne, Anja (2020). Confined Nucleation of Calcium Carbonate Studied in the Surface Forces Apparatus.
• Røyne, Anja (2020). Blir det tomt? Ressurser, forbruk og fremtiden.
• Røyne, Anja (2020, 12. oktober). Ekko. Løsninger på klimakrisen. [Radio].  NRK P2.
• Røyne, Anja (2020, 29. mai). Ekko: Abels Tårn. [Radio].  NRK P2.
• Røyne, Anja (2020, 25. september). Ekko: Abels tårn. [Radio].  NRK P2.
• Røyne, Anja (2020). Menneskets grunnstoffer.
• Røyne, Anja (2020). Menneskets grunnstoffer.
• Røyne, Anja (2020). Menneskets grunnstoffer.
• Røyne, Anja (2020). Menneskets grunnstoffer.
• Røyne, Anja (2020). Menneskets grunnstoffer.
• Røyne, Anja (2020). Menneskets og økosystemets grunnstoffer i et evig kretsløp?.
• Røyne, Anja; Samset, Bjørn Hallvard; Sundal, Anja; Storelvmo, Trude & Joner, Erik (2020). Boklansering: Varm klode, kaldt hode. Løsninger på klimakrisen.
• Røyne, Anja & Seehusen, Joachim (2020, 19. mars). Lager betong med bakterier – gir store reduksjoner i CO₂-utslipp. [Fagblad].  Teknisk Ukeblad.
• Dziadkowiec, Joanna; Javadi, Shaghayegh & Røyne, Anja (2019). Contacts between reactive surfaces.
• Dziadkowiec, Joanna; Zareeipolgardani, Bahareh; Bratvold, Jon E.; Nilsen, Ola; Dysthe, Dag Kristian & Røyne, Anja (2019). Long-range repulsive forces between reactive calcite surfaces are generated due to nucleation in a confined solution.
• Joudeh, Nadeem; Røyne, Anja; Mikheenko, Pavlo & Linke, Dirk (2019). Bio-Engineered Palladium Nanoparticles (BEDPAN).
• Mikheenko, Pavlo; Mikheenko, Iryna; Joudeh, Nadeem; Claxton, J. B.; Røyne, Anja & Linke, Dirk (2019). Imaging magnetism of biologically produced palladium nanoparticles.
• Razbani, Mohammad Amin; Zehner, Jennifer Simone; Jettestuen, Espen; Røyne, Anja; Sikorski, Pawel & Malthe-Sørenssen, Anders (2019). A pore-scale model of microbially induced calcium carbonate precipitation.
• Røyne, Anja (2019, 13. september). Ekko: Abels Tårn. [Radio].  NRK P2.
• Røyne, Anja (2019). Fysikkshow for barn.
• Røyne, Anja (2019). Grunnstoffer: Verdens framtid og deg.
• Røyne, Anja (2019). Historien om verden og grunnstoffene på syv dager. Naturfag.  ISSN 1504-4564.
• Røyne, Anja (2019). Hva alt er laget av og hvor det kommer fra.
• Røyne, Anja (2019). Hva er egentlig verden bygd opp av?.
• Røyne, Anja (2019). Jorda før livet.
• Røyne, Anja (2019). Klima for dummies.
• Røyne, Anja (2019). Mennesket grunnstoffer.
• Røyne, Anja (2019). Mennesket grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Menneskets grunnstoffer.
• Røyne, Anja (2019). Prosalong: Menneskets grunnstoffer.
• Røyne, Anja & Einevoll, Gaute (2019, 17. november). Vett og vitenskap: Om grunnstoffer. [Internett].  Podcast.
• Røyne, Anja; Torgersen, Eivind & Tarjem, Guro (2019, 14. januar). Ekko - Grunnstoffer 3:6 titan kan gjøre oss til kyborger. [Radio].  NRK P2.
• Røyne, Anja; Torgersen, Eivind & Tarjem, Guro (2019, 21. januar). Ekko - Grunnstoffer 4:6 Aluminium kan forandre verden. [Radio].  NRK P2.
• Røyne, Anja; Torgersen, Eivind & Tarjem, Guro (2019, 28. februar). Ekko - Grunnstoffer 5:6 Det livsviktige fosforet. [Radio].  NRK P2.
• Vollsnes, Ane Victoria; Røyne, Anja; Leira, Torkjell & Torgersen, Eivind (2019, 30. august). Regnskogene er ikke jordas lunger – så hvor kommer oksygenet vi puster fra?. [Tidsskrift].  titan.uio.no.
• Zehner, Jennifer Simone; Karlsen, Emil; Razbani, Mohammad Amin; Jettestuen, Espen; Malthe-Sørensen, Anders; Wentzel, Alexander; Sikorski, Pawel; Almaas, Eivind & Røyne, Anja (2019). The quest for bio-concrete: crossing disciplinary boundaries and wrangling bacteria to enable cleaner construction.
• Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja (2018). Adhesive and repulsive forces between calcite surfaces.
• Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja (2018). Nucleation in solution confined between reactive surfaces can generate long-range repulsive forces.
• Javadi, Shaghayegh; Dziadkowiec, Joanna; Røyne, Anja; Bratvold, Jon E.; Nilsen, Ola & Hiorth, Aksel (2018). Synthetic CaCO3 surfaces in aqueous solutions – AFM and Surface Force Apparatus (SFA) measurements.
• Jemterud, Torkild; Røyne, Anja; Gadmar, Tone Charlotte & Brodal, Per (2018, 06. april). Abels tårn, NRK Radio: "Hva skjer når moderne kropper, fylt med silikon og gudene vet hva, en dag skal begraves?". [Radio].  Ekko, NRK P2.
• Jemterud, Torkild; Røyne, Anja; Madsen, Steinar & Bjorå, Charlotte Sletten (2018, 24. august). Abels tårn, NRK P2: "Baby-lukt, vannkraft og hvorfor det å være på bærtur er negativt". [Radio].  NRK P2.
• Jemterud, Torkild; Swang, Ole; Delsett, Lene Liebe & Røyne, Anja (2018, 25. mai). Abels Tårn, NRK P2: "Alfa-hanners kurtise, trampolinehopping i solskinn, kefir-fyll - og forsøk på å løse et klokkemysterium!". [Radio].  NRK P2.
• Johansen, Finn-Eirik; Brautaset, Trygve; Aune, Marie Hjelmseth; Patriksson, Alexandra; Falkenberg, Liv Eggset; Kleppe, Rune; Dick, Gunnar; Strand, Berit Løkensgard; Eijsink, Vincent; Røyne, Anja; Goksøyr, Anders; Svendsen, John Sigurd Mjøen; Fyhn, Marianne; Vik, Jon Olav; Wentzel, Alexander; Aksnes, Astrid; Bruheim, Per; Carlsen, Sven Magnus & Åm, Heidrun (2018). Centre for Digital Life Norway - Annual report 2017. Fulltekst i vitenarkiv.
• Karlsen, Emil; Zehner, Jennifer Simone; Razbani, Mohammad Amin; Jettestuen, Espen; Malthe-sørenssen, Anders; Wentzel, Alexander; Sikorski, Pawel; Almaas, Eivind & Røyne, Anja (2018). Metabolic modelling, reactive transport modelling, and experimental verification of microbial-induced processes in the production of bio-concrete.
• Røyne, Anja (2018). Bærekraftig betong laget av bakterier.
• Røyne, Anja (2018, 28. september). Hvordan kan du bruke BioTech til å skape et nullutslippssamfunn?. [Internett].  LØRN.TECH.
• Røyne, Anja (2018). Kan vi gå tom for råstoffer? Er plan B å hente dem fra verdensrommet?. Aftenposten Vitenskap.  ISSN 2464-3033.
• Røyne, Anja; Eivind, Torgersen & Guro, Tarjem (2018, 14. november). Ekko - Grunnstoffer 1:6 Gull. [Radio].  NRK P2.
• Røyne, Anja; Phua, Yi Jing; Eikjeland, Ina Grosås; Wentzel, Alexander; Le, Simone Balzer; Josefsen, Kjell Domaas; Markussen, Sidsel; Myhr, Anders; Brandtsegg, Andreas Saur; Bjerkeseter, Cato; Throne-Holst, Harald; Borch, Anita; Sikorski, Pawel & Røyne, Frida (2018). BioZEment 2.0: Towards a low CO2 emission building material employing bacterial metabolism.
• Røyne, Anja; Torgersen, Eivind & Tarjem, Guro (2018, 19. desember). Ekko - Grunnstoffer 2:6 Oksygen: Livsfarlig og essensielt. [Radio].  NRK P2.
• Ursin, Lars & Røyne, Anja (2018, 31. mai). Ekspertintervjuet: Bygg med bakterier. [Internett].  energiogklima.no.
• Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja (2017). Interactions between reactive CaCO3 surfaces in aqueous solutions -Surface Forces Apparatus measurements.
• Dziadkowiec, Joanna; Javadi, Shaghayegh & Røyne, Anja (2017). Surface Forces Apparatus measurements of interactions between rough and reactive calcite surfaces.
• Dziadkowiec, Joanna & Røyne, Anja (2017). Interactions between calcite surfaces in Surface Forces Apparatus – effect of ionic strength and dicarboxylic acids.
• Haraldsen, Kirsten Borse; Rogne, Sissel; Eskeland, Ragnhild; Kjeldstad, Torunn; Olsbye, Unni & Røyne, Anja (2017). Panelsamtale: Hva nå? DAMER! 100 år med kvinner i realfagene ved UiO. Vis sammendrag

  Innledning/forberedelser til panelsamtale ledet av Sissel Rogne under åpningen av utstillingen "Damer!"

• Javadi, Shaghayegh; Røyne, Anja & Hiorth, Aksel (2017). AFM study of the adhesion of calcite surfaces in NaCl solutions.
• Jemterud, Torkild; Samset, Bjørn Hallvard; Lönn-Stensrud, Jessica & Røyne, Anja (2017, 24. november). Abels Tårn, NRK P2: "Kan månen ha noe å si når naturkatastrofer på jorda blir utløst? Har du opplevd at eggerøra i matavfallet har begynt å lyse? Har brus med CO2 noen innvirkning på klimaet?". [Radio].  NRK P2.
• Røyne, Anja (2017). BioZEment 2.0: Construction materials made by bacteria.
• Røyne, Anja (2017, 13. oktober). Ekko: Abels Tårn. [Radio].  NRK P2.
• Røyne, Anja (2017, 24. november). Ekko: Abels Tårn. [Radio].  NRK P2.
• Røyne, Anja (2017, 19. mai). Ekko: Abels Tårn. [Radio].  NRK P2.
• Røyne, Anja (2017). Energi, ressurser og klima - går regnestykkene opp?.
• Røyne, Anja (2017). Vannets fantastiske egenskaper.
• Røyne, Anja; Javadi, Shaghayegh & Dziadkowiec, Joanna (2017). Nanoscale forces between calcite surfaces and how they relate to fracturing and friction.
• Røyne, Anja; Phua, Yi Jing; Borch, Anita; Throne-Holst, Harald; Josefsen, Kjell Domaas; Le, Simone Balzer; Markussen, Sidsel; Wentzel, Alexander; Myhr, Anders; Røyne, Frida & Sikorski, Pawel (2017). Kunsten å arbeide tverrfaglig. Forskerforum.  ISSN 0800-1715.  4
• Røyne, Anja; Phua, Yi Jing; Eikjeland, Ina Grosås; Le, Simone Balzer; Markussen, Sidsel; Josefsen, Kjell Domaas & Wentzel, Alexander (2017). Concrete production through microbially induced dissolution and re-precipitation of limestone.
• Høgberget, Jørgen; Kohler, Felix; Røyne, Anja; Jettestuen, Espen & Dysthe, Dag Kristian (2016). Combining in situ Interferometry and Kinetic Monte Carlo to Study Mechanisms of Nanoconfined Crystallization.
• Javadi, Shaghayegh; Røyne, Anja & Hiorth, Aksel (2016). Interaction between two calcite surfaces, in nano-scale, as a function of fluid composition. Vis sammendrag

  As one part of the Enhanced oil recovery (EOR) techniques, the injection of fluid into chalk reservoirs, specifically in the North sea, has been of interest for several years. Despite extensive research in this field, there are still many questions left to be answered. One such question is the compaction of chalk reservoirs as the impact of fluid injection. The cause of this process is not fully understood, but it is believed that the microscopic origin of this effect could reveal the secrets behind this phenomenon [1]. Recent experimental and theoretical works have shown, e.g., [1] & [2], that the mechanical strength of chalk rocks behave dependently on the chemistry of pore fluid. In particular, it may be the interfacial nano-forces near the grain boundaries that are responsible for mechanical behavior of two interacting calcite-bearing rocks. In this work, we present an experimental study, in which the hydration re- pulsion between two calcite surfaces is measured. We have developed an experimental method using Atomic Force Microscope (AFM), in which a tip- less AFM cantilever is glued to a calcite fragment, from a freshly cleaved calcite crystal [3]. We then investigate the interaction between these two cal- cite grains in a fluid cell containing salt water. We show the effect of ionic compound, ionic strength and salinity on the hydration short-range forces be- tween calcite surfaces over the time. The result of this study can help us to understand the mechanism behind the chalk-liquid interactions and so-called chalk water weakening due to water adsorption on calcite surfaces. Figure 1 shows a simple sketch of the AFM-tip modification (left), and a SEM image of one of the calcite grains attached to the AFM cantilever (right).

• Mikheenko, Pavlo; Mollatt, H.J.S.; Qureishy, Thomas & Røyne, Anja (2016). A Graphene-based Technique for Imaging Thermomagnetic Avalanches in Superconducting Thin Films.

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