-
Dziadkowiec, Joanna
(2024).
Surface forces apparatus measurements of reactive mineral surfaces under confinement.
-
Dziadkowiec, Joanna
(2023).
Confined Crystal Growth Experiments in Surface Forces Apparatus.
-
-
Pfefferkorn, Hendrik; Dziadkowiec, Joanna; Valtiner, Markus & Ban, Matea
(2022).
Wie stoppen Nanopartikel den Verfall alter Gebäude?
[TV].
Servus TV.
Show summary
Kalk-Sandstein ist Lieblingswerkstoff alter Baumeister von Schlössern, Kirchen und Denkmälern. Doch saurer Regen oder ätzender Vogelkot können ihn allmählich zersetzen und Bauwerke beginnen zu verfallen. Nun haben Werkstoffwissenschaftler eine winzig kleine Lösung im Visier, die selbst die größten Gebäude schützen kann.
-
Dziadkowiec, Joanna
(2022).
Experimental measurements of surface forces between mineral surfaces.
-
Dziadkowiec, Joanna; Javadi, Shaghayegh; Ban, Matea; Jamtveit, Bjørn & Røyne, Anja
(2022).
Ion-dependent adhesion between calcite surfaces.
-
Dziadkowiec, Joanna; Ban, Matea; Javadi, Shaghayegh; Jamtveit, Bjørn & Røyne, Anja
(2021).
Ion-specific adhesion between brittle calcite surfaces.
-
Dziadkowiec, Joanna
(2021).
Nucleation in confinement – experiments in surface forces apparatus.
-
-
Dziadkowiec, Joanna; Zareeipolgardani, Bahareh; Cheng, Hsiu-Wei; Dysthe, Dag Kristian; Røyne, Anja & Valtiner, Markus
(2021).
Forces between reactive surfaces.
Show summary
Adhesive and repulsive, nm-range surface forces acting between mineral grains control colloidal stability and mineral aggregation but less is known about how these forces are affected by surface reactivity and to what extent these grain-scale forces can influence various deformation processes in rocks. In this experimental work, we explore and quantify the surface forces acting between dynamic mineral surfaces that undergo recrystallization or are chemically reactive in contact with water or aqueous salt solutions. Our experimental setup consists of the surface forces apparatus (SFA) coupled with the multiple beam interferometry (MBI). This setup can excellently reproduce a typical grain contact geometry with nanometer-thin water films confined between contacting mineral grains over relatively large, micron-sized contact areas. Owing to the use of MBI, both surface growth or dissolution processes can be monitored during force measurements in real-time. As such, SFA can provide information about the links between surface reactivity and adhesive or repulsive surface forces. Using the examples of force measurements between recrystallizing or chemically reactive mineral surfaces such as carbonates, hydroxides, and silicates, we comment on the relationship between the measured surface forces and surface reactivity. We link our findings with the observed changes in mineral phases, surface topographies, or surface roughness. We also comment on how the micron-scale confinement in the SFA affects the growth and dissolution processes in contrast to less confined regions. The magnitude of the forces associated with dynamic mineral surfaces and the potential significance of these forces to macroscopic deformation processes and cohesion in rocks are discussed.
-
Dziadkowiec, Joanna & Røyne, Anja
(2021).
Do soluble organic acids bind to basal mica surfaces?
Show summary
Soluble organic acids are constantly supplied to soils as a result of the oxidative decomposition of organic matter by the plant roots and microorganisms. These carboxylic group-bearing organic molecules can interact with soil clay minerals and affect the formation and stability of organomineral aggregates. While it has been suggested that –COOH laden organics can strongly bind to broken clay
edges, less is known about how such soluble acids interact with negatively charged basal clay surfaces.
This work presents a Surface Forces Apparatus (SFA) study of interactions between two mica surfaces in dicarboxylic acid molecules with 2 to 7 carbon atoms. SFA allows measuring nanoscale surface forces acting between macroscopic surfaces as a function of surface separation. Since, unlike as in atomic force microscopy, the absolute surface separation in the SFA is known, it is possible simultaneously probe the adsorption of dicarboxylic acids onto mica.
The results show that significant amounts of dicarboxylic acids can adsorb on mica surfaces, but only in the presence of Ca2+ ions. Ca2+ acts as cationic bridges between the negatively charged mica surface and deprotonated –COO- functionalities. In addition, the multilayer binding of larger dicarboxylic acids (C5-C7) via an assembly of hydrophobic chains is resolved. Na+ does not promote
any substantial dicarboxylic acid adsorption and induce strong repulsion between mica surfaces.
In summary, although these face-specific SFA measurements show that dicarboxylic acids adsorb onto mica basal surfaces only by weak forces including electrostatic, hydrophobic, and likely hydrogen bonding, they demonstrate that even such weak outer-sphere adsorption can affect adhesion between clay surfaces and play a role in the organomineral aggregate formation.
Acknowledgments:
This study has been financed by the Research Council of Norway (grant No 286733) and the European Union Horizon 2020 (grant No 642976-Nano-Heal).
-
-
-
-
Dziadkowiec, Joanna; Cheng, Hsiu-Wei; Røyne, Anja & Valtiner, Markus
(2020).
Interactions between reactive mineral surfaces studied with the surface forces apparatus.
-
Dziadkowiec, Joanna
(2019).
Interactions between mineral surfaces studied with the surface forces apparatus.
-
Dziadkowiec, Joanna
(2019).
(CaCO3) Nucleation in confinement.
-
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.
-
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.
-
Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja
(2018).
Adhesive and repulsive forces between calcite surfaces.
-
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
.
-
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.
-
Dziadkowiec, Joanna; Javadi, Shaghayegh; Bratvold, Jon E.; Nilsen, Ola & Røyne, Anja
(2017).
Interactions between reactive CaCO3 surfaces in aqueous solutions -Surface Forces Apparatus measurements
.