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Claesson, Per M.
Publications (10 of 30) Show all publications
Kharitonov, D. S., Sommertune, J., Örnek, C., Ryl, J., Kurilo, I. I., Claesson, P. M. & Pan, J. (2019). Corrosion inhibition of aluminium alloy AA6063-T5 by vanadates: Local surface chemical events elucidated by confocal Raman micro-spectroscopy. CORROSION SCIENCE, 148, 237-250
Open this publication in new window or tab >>Corrosion inhibition of aluminium alloy AA6063-T5 by vanadates: Local surface chemical events elucidated by confocal Raman micro-spectroscopy
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2019 (English)In: CORROSION SCIENCE, Vol. 148, p. 237-250Article in journal (Refereed) Published
Abstract [en]

Chemical interactions between aqueous vanadium species and aluminium alloy AA6063-T5 were investigated in vanadate-containing NaCl solutions. Confocal Raman and X-ray photoelectron spectroscopy experiments were utilised to gain insight into the mechanism of corrosion inhibition by vanadates. A greenish-grey coloured surface layer, consisting of V+4 and V+5 polymerized species, was seen to form on the alloy surface, especially on top of cathodic micrometre-sized IMPs, whereby suppressing oxygen reduction kinetics. The results suggest a two-step mechanism of corrosion inhibition in which V+5 species are first reduced to V+4 or V+3 species above cathodic IMPs, and then oxidized to mixed-valence V+5/V+4 polymerized compounds.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD, 2019
Keywords
Aluminium, Alloy, Raman spectroscopy, SEM, XPS, Vanadate inhibitor
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-244484 (URN)10.1016/j.corsci.2018.12.011 (DOI)000457950400023 ()2-s2.0-85059158841 (Scopus ID)
Note

QC 20190321

Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-04-04Bibliographically approved
Eriksson, M., Tuominen, M., Jarn, M., Claesson, P. M., Wallqvist, V., Butt, H. J., . . . Swerin, A. (2019). Direct Observation of Gas Meniscus Formation on a Superhydrophobic Surface. ACS Nano, 13(2), 2246-2252
Open this publication in new window or tab >>Direct Observation of Gas Meniscus Formation on a Superhydrophobic Surface
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2019 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 13, no 2, p. 2246-2252Article in journal (Refereed) Published
Abstract [en]

The formation of a bridging gas meniscus via cavitation or nanobubbles is considered the most likely origin of the submicrometer long-range attractive forces measured between hydrophobic surfaces in aqueous solution. However, the dynamics of the formation and evolution of the gas meniscus is still under debate, in particular, in the presence of a thin air layer on a superhydrophobic surface. On superhydrophobic surfaces the range can even exceed 10 mu m. Here, we report microscopic images of the formation and growth of a gas meniscus during force measurements between a superhydrophobic surface and a hydrophobic microsphere immersed in water. This is achieved by combining laser scanning confocal microscopy and colloidal probe atomic force microscopy. The configuration allows determination of the volume and shape of the meniscus, together with direct calculation of the Young-Laplace capillary pressure. The long-range attractive interactions acting on separation are due to meniscus formation and volume growth as air is transported from the surface layer.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
Keywords
superhydrophobicity, wetting, laser scanning confocal microscopy, AFM colloidal probe, capillary forces
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-247848 (URN)10.1021/acsnano.8b08922 (DOI)000460199400122 ()30707561 (PubMedID)2-s2.0-85061527266 (Scopus ID)
Note

QC 20190326

Available from: 2019-03-26 Created: 2019-03-26 Last updated: 2019-04-23Bibliographically approved
Dedinaite, A. & Claesson, P. M. (2019). How synergistic aqueous lubrication is mediated by natural and synthetic molecular aggregates. In: IOP Conference Series: Materials Science and Engineering. Paper presented at 18th International Conference Baltic Polymer Symposium 2018, BPS 2018, 12 September 2018 through 14 September 2018. Institute of Physics Publishing (1)
Open this publication in new window or tab >>How synergistic aqueous lubrication is mediated by natural and synthetic molecular aggregates
2019 (English)In: IOP Conference Series: Materials Science and Engineering, Institute of Physics Publishing , 2019, no 1Conference paper, Published paper (Refereed)
Abstract [en]

Nature lubricates in aqueous environment, and thus the example of a human synovial joint with its seamless function has been a fascination for scientists since the times of the birth of modern science. Here, inspired by nature, we investigate the mechanistic function of three different types of synergistic molecular aggregates. Firstly, we show how simple phospholipids lubricate hydrophilic model surfaces of silica and how this lubrication is facilitated further by the presence of an anionic polysaccharide, hyaluronan, due to the enhanced surface build-up of lubricant material. Next, we mimic natural polylectrolytesurfactant aggregation by employing a highly positively charged polyelectrolyte and anionic surfactant that strongly associate both in the bulk and at the surfaces by building structured aggregates that lubricate due to hydration lubrication. This occurs despite of the presence of strong attraction between the lubricated surfaces. This is an example of synergistic lubrication due to particular internal structural arrangement of the aggregates. Finally, we investigate the case of synergistic lubrication due to preferential surface ordering of two biological polyelectrolytes, cartilage oligomeric matrix protein and lubricin, that leads to favourable lubrication.

Place, publisher, year, edition, pages
Institute of Physics Publishing, 2019
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-255929 (URN)10.1088/1757-899X/500/1/012030 (DOI)2-s2.0-85064873793 (Scopus ID)
Conference
18th International Conference Baltic Polymer Symposium 2018, BPS 2018, 12 September 2018 through 14 September 2018
Note

QC 20190821

Available from: 2019-08-21 Created: 2019-08-21 Last updated: 2019-08-21Bibliographically approved
Wojas, N., Swerin, A., Wallqvist, V., Jarn, M., Schoelkop, J., Gane, P. A. C. & Claesson, P. M. (2019). Iceland spar calcite: Humidity and time effects on surface properties and their reversibility. Journal of Colloid and Interface Science, 541, 42-55
Open this publication in new window or tab >>Iceland spar calcite: Humidity and time effects on surface properties and their reversibility
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2019 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 541, p. 42-55Article in journal (Refereed) Published
Abstract [en]

Understanding the complex and dynamic nature of calcite surfaces under ambient conditions is important for optimizing industrial applications. It is essential to identify processes, their reversibility, and the relevant properties of CaCO3 solid-liquid and solid-gas interfaces under different environmental conditions, such as at increased relative humidity (RH). This work elucidates changes in surface properties on freshly cleaved calcite (topography, wettability and surface forces) as a function of time (<= 28 h) at controlled humidity (<= 3-95 %RH) and temperature (25.5 degrees C), evaluated with atomic force microscopy (AFM) and contact angle techniques. In the presence of humidity, the wettability decreased, liquid water capillary forces dominated over van der Waals forces, and surface domains, such as hillocks, height about 7.0 angstrom, and trenches, depth about -3.5 angstrom, appeared and grew primarily in lateral dimensions. Hillocks demonstrated lower adhesion and higher deformation in AFM experiments. We propose that the growing surface domains were formed by ion dissolution and diffusion followed by formation of hydrated salt of CaCO3. Upon drying, the height of the hillocks decreased by about 50% suggesting their alteration into dehydrated or less hydrated CaCO3. However, the process was not entirely reversible and crystallization of new domains continued at a reduced rate.

Place, publisher, year, edition, pages
ACADEMIC PRESS INC ELSEVIER SCIENCE, 2019
Keywords
Iceland spar calcite, Calcium carbonate minerals, Humidity effects, Reversibility of aging effects, Recrystallization, Surface wettability, Surface topography, Nanomechanical properties, Capillary forces, Van der Waals forces
National Category
Corrosion Engineering
Identifiers
urn:nbn:se:kth:diva-246229 (URN)10.1016/j.jcis.2019.01.047 (DOI)000460080700005 ()30682592 (PubMedID)2-s2.0-85060193864 (Scopus ID)
Note

QC 20190404

Available from: 2019-04-04 Created: 2019-04-04 Last updated: 2019-04-04Bibliographically approved
Niga, P., Hansson-Mille, P. M., Swerin, A., Claesson, P. M., Schoelkopf, J., Gane, P. A. C., . . . Johnson, C. M. (2019). Propofol adsorption at the air/water interface: a combined vibrational sum frequency spectroscopy, nuclear magnetic resonance and neutron reflectometry study. Soft Matter, 15(1), 38-46
Open this publication in new window or tab >>Propofol adsorption at the air/water interface: a combined vibrational sum frequency spectroscopy, nuclear magnetic resonance and neutron reflectometry study
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2019 (English)In: Soft Matter, ISSN 1744-683X, E-ISSN 1744-6848, Vol. 15, no 1, p. 38-46Article in journal (Refereed) Published
Abstract [en]

Propofol is an amphiphilic small molecule that strongly influences the function of cell membranes, yet data regarding interfacial properties of propofol remain scarce. Here we consider propofol adsorption at the air/water interface as elucidated by means of vibrational sum frequency spectroscopy (VSFS), neutron reflectometry (NR), and surface tensiometry. VSFS data show that propofol adsorbed at the air/ water interface interacts with water strongly in terms of hydrogen bonding and weakly in the proximity of the hydrocarbon parts of the molecule. In the concentration range studied there is almost no change in the orientation adopted at the interface. Data from NR show that propofol forms a dense monolayer with a thickness of 8.4 angstrom and a limiting area per molecule of 40 angstrom(2), close to the value extracted from surface tensiometry. The possibility that islands or multilayers of propofol form at the air/water interface is therefore excluded as long as the solubility limit is not exceeded. Additionally, measurements of the 1H NMR chemical shifts demonstrate that propofol does not form dimers or multimers in bulk water up to the solubility limit.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2019
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-241311 (URN)10.1039/c8sm01677a (DOI)000454838800015 ()30516226 (PubMedID)2-s2.0-85058894693 (Scopus ID)
Note

QC 20190125

Available from: 2019-01-25 Created: 2019-01-25 Last updated: 2019-04-09Bibliographically approved
Claesson, P. M., Dobryden, I., He, Y. & Li, G. (2019). Surface Nanomechanics of Coatings and Hydrogels. In: IOP Conference Series: Materials Science and Engineering. Paper presented at 18th International Conference Baltic Polymer Symposium 2018, BPS 2018, 12 September 2018 through 14 September 2018. Institute of Physics Publishing (1)
Open this publication in new window or tab >>Surface Nanomechanics of Coatings and Hydrogels
2019 (English)In: IOP Conference Series: Materials Science and Engineering, Institute of Physics Publishing , 2019, no 1Conference paper, Published paper (Refereed)
Abstract [en]

Due to the increasing use of nanostructured materials and thin coatings as barrier materials, it has become of high importance to measure and understand material properties on the nm to 100 nm length scales. In this article we demonstrate and discuss how atomic force microscopy techniques can be used to this end. It is demonstrated that the classical analysis based on the assumption of a purely elastic material response is a fair approximation for relatively stiff coatings (elastic modulus order of GPa), whereas viscous responses must be considered for soft materials (apparent modulus order of MPa) such as hydrogels.

Place, publisher, year, edition, pages
Institute of Physics Publishing, 2019
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:kth:diva-255930 (URN)10.1088/1757-899X/500/1/012025 (DOI)2-s2.0-85064865835 (Scopus ID)
Conference
18th International Conference Baltic Polymer Symposium 2018, BPS 2018, 12 September 2018 through 14 September 2018
Note

QC 20190816

Available from: 2019-08-16 Created: 2019-08-16 Last updated: 2019-08-16Bibliographically approved
Hedberg, Y., Dobryden, I., Chaudhary, H., Wei, Z., Claesson, P. M. & Lendel, C. (2019). Synergistic effects of metal-induced aggregation of human serum albumin. Colloids and Surfaces B: Biointerfaces, 173, 751-758
Open this publication in new window or tab >>Synergistic effects of metal-induced aggregation of human serum albumin
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2019 (English)In: Colloids and Surfaces B: Biointerfaces, ISSN 0927-7765, E-ISSN 1873-4367, Vol. 173, p. 751-758Article in journal (Refereed) Published
Abstract [en]

Exposure to cobalt (Co), chromium (Cr), and nickel (Ni) occurs often via skin contact and from different dental and orthopedic implants. The metal ions bind to proteins, which may induce structural changes and aggregation, with different medical consequences. We investigated human serum albumin (HSA) aggregation in the presence of Co-II, Cr-III, and/or Ni-II ions and/or their nanoparticle precipitates by using scattering, spectroscopic, and imaging techniques, at simulated physiological conditions (phosphate buffered saline - PBS, pH 7.3) using metal salts that did not affect the pH, and at HSA:metal molar ratios of up to 1:8. Co ions formed some solid nano particles in PBS at the investigated conditions, as determined by nanoparticle tracking analysis, but the Cr-III anions and Ni-II ions remained fully soluble. It was found that all metal ions induced HSA aggregation, and this effect was significantly enhanced when a mixture of all three metal ions was present instead of any single type of ion. Thus, the metal ions induce aggregation synergistically. HSA aggregates formed linear structures on a mica surface in the presence of Cr-III ions. A clear tendency of aggregation and linearly aligned aggregates was seen in the presence of all three metal ions. Spectroscopic investigations indicated that the majority of the HSA molecules maintained their alpha helical secondary structure and conformation. This study highlights the importance of synergistic effects of metal ions and/or their precipitates on protein aggregation, which are highly relevant for implant materials and common exposures to metals.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
Keywords
Cobalt, Chromium, Nickel, Binding, Albumin, Aggregation
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-241193 (URN)10.1016/j.colsurfb.2018.10.061 (DOI)000454377300089 ()30384272 (PubMedID)2-s2.0-85055579350 (Scopus ID)
Note

QC 20190121

Available from: 2019-01-21 Created: 2019-01-21 Last updated: 2019-01-21Bibliographically approved
Dobryden, I., Ruiz, M. C., Zhang, X., Dédinaité, A., Wieland, D. C., Winnik, F. M. & Claesson, P. M. (2019). Thermoresponsive Pentablock Copolymer on Silica: Temperature Effects on Adsorption, Surface Forces, and Friction. Paper presented at AESSON PM, 1987, JOURNAL OF COLLOID AND INTERFACE SCIENCE, V117, P366 jas OJ, 2002, LANGMUIR, V18, P1604 ltermo A, 1996, JOURNAL OF COLLOID AND INTERFACE SCIENCE, V183, P506 trov P, 1997, LANGMUIR, V13, P3331 ein J, 2000, JOURNAL OF PHYSICS-CONDENSED MATTER4th Liquid Matter Conference, JUL 03-07, 1999, GRANADA, SPAIN, V12, PA19 unkett MA, 2003, LANGMUIR, V19, P4673 nquy Xavier, 2014, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, V136, P6199 ttersson Torbjorn, 2008, JOURNAL OF COLLOID AND INTERFACE SCIENCE, V324, P246 ndin Maria, 2008, LANGMUIR, V24, P3814. Langmuir, 35(3), 653-661
Open this publication in new window or tab >>Thermoresponsive Pentablock Copolymer on Silica: Temperature Effects on Adsorption, Surface Forces, and Friction
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2019 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 35, no 3, p. 653-661Article in journal (Refereed) Published
Abstract [en]

The adsorption of hydrophilic or amphiphilic multiblock copolymers provides a powerful means to produce well-defined "smart" surfaces, especially if one or several blocks are sensitive to external stimuli. We focus here on an A-B-A-B-A copolymer, where A is a cationic poly((3acrylamido-propyl)-trimethylammonium chloride) (PAMPTMA) block containing 15 (end blocks) or 30 (middle block) repeat units and B is a neutral thermosensitive water-soluble poly(2-isopropyl-2-oxazoline) (PIPOZ) block with 50 repeat units. X-ray reflectivity and quartz crystal microbalance with dissipation monitoring were employed to study the adsorption of PAMPTMA(15)-PAMPTMA(30)-PIPOZ(50)-PAMPTMA(15) on silica surfaces. The latter technique was employed at different temperatures up to 50 degrees C. Surface forces and friction between the two silica surfaces across aqueous pentablock copolymer solutions at different temperatures were determined with the atomic force microscopy colloidal probe force and friction measurements. The cationic pentablock copolymer was found to have a high affinity to the negatively charged silica surface, leading to a thin (2 nm) and rigid adsorbed layer. A steric force was encountered at a separation of around 3 nm from hard wall contact. A capillary condensation of a polymer-rich phase was observed at the cloud point of the solution. The friction forces were evaluated using Amontons' rule modified with an adhesion term.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-244115 (URN)10.1021/acs.langmuir.8b03729 (DOI)000456749400007 ()30605339 (PubMedID)
Conference
AESSON PM, 1987, JOURNAL OF COLLOID AND INTERFACE SCIENCE, V117, P366 jas OJ, 2002, LANGMUIR, V18, P1604 ltermo A, 1996, JOURNAL OF COLLOID AND INTERFACE SCIENCE, V183, P506 trov P, 1997, LANGMUIR, V13, P3331 ein J, 2000, JOURNAL OF PHYSICS-CONDENSED MATTER4th Liquid Matter Conference, JUL 03-07, 1999, GRANADA, SPAIN, V12, PA19 unkett MA, 2003, LANGMUIR, V19, P4673 nquy Xavier, 2014, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, V136, P6199 ttersson Torbjorn, 2008, JOURNAL OF COLLOID AND INTERFACE SCIENCE, V324, P246 ndin Maria, 2008, LANGMUIR, V24, P3814
Funder
Swedish Research Council, 2015-05080
Note

QC 20190219

Available from: 2019-02-19 Created: 2019-02-19 Last updated: 2019-02-19Bibliographically approved
Wojas, N., Swerin, A., Claesson, P. M., Wallqvist, V., Jarn, M., Gane, P., . . . Adam, M. (2018). Adsorption of water and gaseous species on calcite surfaces at different relative humidity and temperature. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstract of Papers of the American Chemical Society, 255
Open this publication in new window or tab >>Adsorption of water and gaseous species on calcite surfaces at different relative humidity and temperature
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2018 (English)In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-240173 (URN)000435537705728 ()
Conference
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Note

QC 20181218

Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2018-12-19Bibliographically approved
Bełdowski, P., Weber, P., Dédinaité, A., Claesson, P. M. & Gadomski, A. (2018). Correction: Physical crosslinking of hyaluronic acid in the presence of phospholipids in an aqueous nano-environment (Soft Matter (2018) DOI: 10.1039/c8sm01388h). Soft Matter, 14(47)
Open this publication in new window or tab >>Correction: Physical crosslinking of hyaluronic acid in the presence of phospholipids in an aqueous nano-environment (Soft Matter (2018) DOI: 10.1039/c8sm01388h)
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2018 (English)In: Soft Matter, Vol. 14, no 47Article in journal (Refereed) Published
Abstract [en]

Correction for 'Physical crosslinking of hyaluronic acid in the presence of phospholipids in an aqueous nano-environment' by Piotr Bełdowski et al., Soft Matter, 2018, DOI: 10.1039/c8sm01388h. 

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2018
National Category
Corrosion Engineering
Identifiers
urn:nbn:se:kth:diva-246563 (URN)10.1039/c8sm90222d (DOI)000452321400018 ()2-s2.0-85058156639 (Scopus ID)
Note

Erratum

QC 20190527

Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-27Bibliographically approved
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