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  • 1.
    Dehestani, Mahdi
    et al.
    Purdue University, USA.
    Zemlyanov, Dmitry Yu
    Purdue University, USA.
    Adolfsson, Erik
    RISE - Research Institutes of Sweden, Material och produktion, IVF.
    Stanciu, Lia A.
    Purdue University, USA.
    Improving bioactivity of inert bioceramics by a novel Mg-incorporated solution treatment2017Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 425, s. 564-575Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Zirconia/alumina ceramics possess outstanding mechanical properties for dental and orthopedic applications, but due to their poor surface bioactivities they exhibit a weak bone-bonding ability. This work proposes an effective 30-min solution treatment which could successfully induce formation of bone-like apatite on the surface of 3Y-TZP and a ternary composite composed of yttria-stabilized zirconia, ceria-stabilized zirconia, and alumina (35 vol% 3Y-TZP + 35 vol% 12Ce-TZP + 30 vol% Al2O3) after 3 weeks immersion in simulated body fluid (SBF). XRD was used for phase identification in the ceramic materials. The influence of solution treatment on the surface chemistry and its role on apatite formation were investigated via SEM, EDS and XPS. In vitro apatite-forming ability for the solution-treated and untreated samples of the composite and individual substrates of 3Y-TZP, 12Ce-TZP, and Al2O3 was evaluated by immersion in SBF. Apatite crystals were formed only on 3Y-TZP and composite substrates, implying that it is mainly the 3Y-TZP constituent that contributes to the bioactivity of the composite. Further, it was found from the XPS analysis that the zirconia material with higher phase stability (12Ce-TZP) produced less Zr–OH functional groups on its surface after solution treatment which accounts for its weaker bioactivity compared to 3Y-TZP. 

  • 2.
    Ejenstam, Lina
    et al.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Polymer och fiber. KTH Royal Institute of Technology, Sweden.
    Tuominen, Mikko
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Haapanen, Janne
    Tampere University of Technology, Finland.
    Mäkelä, Jyrki M.
    Tampere University of Technology, Finland.
    Pan, Jinshan
    KTH Royal Institute of Technology, Sweden.
    Swerin, Agne
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. KTH Royal Institute of Technology, Sweden.
    Claesson, Per M.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. KTH Royal Institute of Technology, Sweden.
    Long-term corrosion protection by a thin nano-composite coating2015Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 357, nr Part B, s. 2333-2342Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We report and discuss the corrosion protective properties of a thin nano-composite coating system consisting of an 11μm thick polyester acrylate (PEA) basecoat, covered by an approximately 1-2μm thick layer of TiO2 nanoparticles carrying a 0.05μm thick hexamethyl disiloxane (HMDSO) top coat. The corrosion protective properties were evaluated on carbon steel substrates immersed in 3wt% NaCl solution by open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) measurements. The protective properties of each layer, and of each pair of layers, were also evaluated to gain further understanding of the long-term protective properties offered by the nano-composite coating. The full coating system showed excellent corrosion protective properties in the corrosive environment of 3wt% NaCl-solution for an extended period of 100 days, during which the coating impedance, at the lower frequency limit (0.01Hz), remained above 108 Ωcm2. We suggest that the excellent corrosion protective properties of the complete coating system is due to a combination of (i) good adhesion and stability of the PEA basecoat, (ii) the surface roughness and the elongated diffusion path provided by the addition of TiO2 nanoparticles, and (iii) the low surface energy provided by the HMDSO top coat.

  • 3.
    Ferraris, M.
    et al.
    Politecnico di Torino, Italy.
    Perero, S.
    Politecnico di Torino, Italy.
    Ferraris, S.
    Politecnico di Torino, Italy.
    Miola, M.
    Politecnico di Torino, Italy.
    Vernè, E.
    Politecnico di Torino, Italy.
    Skoglund, S.
    KTH Royal Institute of Technology, Sweden.
    Blomberg, Eva
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Kemi och material. KTH Royal Institute of Technology, Sweden.
    Odnevall Wallinder, I.
    KTH Royal Institute of Technology, Sweden.
    Antibacterial silver nanocluster/silica composite coatings on stainless steel2017Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 396, s. 1546-1555Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A coating made of silver nanocluster/silica composites has been deposited, via a radio frequency (RF) co-sputtering technique, for the first time onto stainless steel (AISI 304L) with the aim to improve its antibacterial properties. Different thermal treatments after coating deposition have been applied in order to optimize the coating adhesion, cohesion and its antibacterial properties. Its applicability has been investigated at realistic conditions in a cheese production plant. The physico-chemical characteristics of the coatings have been analyzed by means of different bulk and surface analytical techniques. Field emission scanning electron microscopy (FESEM), X-ray Photoelectron Spectroscopy (XPS), contact angle measurements and atomic force microscopy (AFM) were employed to assess coating morphology, composition, surface roughness, wetting properties, size and local distribution of the nanoparticles within the coating. Tape tests were used to determine the adhesion/cohesion properties of the coating. The amount and time-dependence of released silver in solutions of acetic acid, artificial water, artificial tap water and artificial milk were determined by means of Atomic Absorption Spectroscopy (AAS). The antibacterial effect of the coating was evaluated at different experimental conditions using a standard bacterial strain of Staphylococcus aureus in compliance with National Committee for Clinical Laboratory Standards (NCCLS) and AATCC 147 standards. The Ahearn test was performed to measure the adhesion of bacteria to the coated stainless steel surface compared with a control surface. The antibacterial coating retained its antibacterial activity after thermal treatment up to 450 °C and after soaking in common cleaning products for stainless steel surfaces used for e.g. food applications. The antibacterial capacity of the coating remained at high levels for 1-5 days, and showed a good capacity to reduce the adhesion of bacteria up to 30 days. Only a few percent of silver in the coating was released into acetic acid, even after 10 days of exposure at 40 °C. Most silver (> 90%) remained also in the coating even after 240 h of continuous exposure. Similar observations were made after repeated exposure at 100 °C. Very low levels of released silver in solution were observed in artificial milk. No release of silver nanoparticles was observed either in synthetic tap water or in artificial milk at given conditions. The coating further displayed good antibacterial properties also when tested during working conditions in a cheese production plant.

  • 4.
    Ferraris, Sara
    et al.
    Politecnico di Torino, Italy.
    Perero, Sergio
    Politecnico di Torino, Italy.
    Miola, Marta
    Politecnico di Torino, Italy.
    Verne, Enrica
    Politecnico di Torino, Italy.
    Rosiello, A.
    Aero Sekur S.p.A., Italy.
    Ferrazo, V.
    Aero Sekur S.p.A., Italy.
    Valetta, G.
    Aero Sekur S.p.A., Italy.
    Sanchez, J.
    Bactiguard AB, Sweden.
    Ohrlander, Mattias
    Bactiguard AB, Sweden.
    Tjörhammar, Staffan
    KTH Royal Institute of Technology, Sweden.
    Fokine, Michael
    KTH Royal Institute of Technology, Sweden.
    Laurell, Frederik
    KTH Royal Institute of Technology, Sweden.
    Blomberg, Eva
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Skoglund, Sara
    KTH Royal Institute of Technology, Sweden.
    Odnevall Wallinder, Inger
    KTH Royal Institute of Technology, Sweden.
    Ferraris, Monica
    Politecnico di Torino, Italy.
    Chemical, mechanical and antibacterial properties of silver nanocluster/silica composite coated textiles for safety systems and aerospace applications2014Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 317, nr Oct, s. 131-139Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This work describes the chemical, mechanical and antibacterial properties of a novel silver nanocluster/silica composite coating, obtained by sputtering, on textiles for use in nuclear bacteriological and chemical (NBC) protection suites and for aerospace applications. The properties of the coated textiles were analyzed in terms of surface morphology, silver concentration and silver release in artificial sweat and synthetic tap water, respectively. No release of silver nanoparticles was observed at given conditions. The water repellency, permeability, flammability and mechanical resistance of the textiles before and after sputtering demonstrated that the textile properties were not negatively affected by the coating. The antibacterial effect was evaluated at different experimental conditions using a standard bacterial strain of Staphylococcus aureus and compared with the behavior of uncoated textiles. The coating process conferred all textiles a good antibacterial activity. Optimal deposition conditions were elaborated to obtain sufficient antibacterial action without altering the aesthetical appearance of the textiles. The antibacterial coating retained its antibacterial activity after one cycle in a washing machine only for the Nylon based textile.

  • 5.
    He, Yunjuan
    et al.
    KTH Royal Institute of Technology, Sweden.
    Dobryden, Illia
    KTH Royal Institute of Technology, Sweden.
    Pan, Jinshan
    KTH Royal Institute of Technology, Sweden.
    Ahniyaz, Anwar
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Yta, process och formulering.
    Deltin, Tomas
    PTE Coatings AB, Sweden.
    Corkery, Robert W.
    KTH Royal Institute of Technology, Sweden.
    Claesson, Per M.
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Yta, process och formulering. KTH Royal Institute of Technology, Sweden.
    Nano-scale mechanical and wear properties of a waterborne hydroxyacrylic-melamine anti-corrosion coating2018Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 457, s. 548-558Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Corrosion protection is commonly achieved by applying a thin polymer coating on the metal surface. Many studies have been devoted to local events occurring at the metal surface leading to local or general corrosion. In contrast, changes occurring in the organic coating after exposure to corrosive conditions are much less studied. In this article we outline how changes in the coating itself due to curing conditions, environmental and erosion effects can be investigated at the nanometer scale, and discuss how such changes would affect its corrosion protection performance. We focus on a waterborne hydroxyacrylic-melamine coating, showing high corrosion protection performance for carbon steel during long-term (≈35 days) exposure to 0.1 M NaCl solution. The effect of curing time on the conversion of the crosslinking reaction within the coating was evaluated by fourier transform infrared spectroscopy (FTIR); the wetting properties of the cured films were investigated by contact angle measurement, and the corrosion resistance was studied by electrochemical impedance spectroscopy (EIS). In particular, coating nanomechanical and wear properties before and after exposure to 0.1 M NaCl, were evaluated by atomic force microscopy (AFM). Fiber-like surface features were observed after exposure, which are suggested to arise due to diffusion of monomers or low molecular weight polymers to the surface. This may give rise to local weakening of the coating, leading to local corrosion after even longer exposure times. We also find a direct correlation between the stick-slip spacing during shearing and plastic deformation induced in the surface layer, giving rise to topographical ripple structures on the nanometer length scale.

  • 6.
    He, Yunjuan
    et al.
    KTH Royal Institute of Technology, Sweden.
    Li, Gen
    KTH Royal Institute of Technology, Sweden.
    Hwang, Ki-Hwan
    KTH Royal Institute of Technology, Sweden; Sungkyunkwan University, Republic of Korea.
    Boluk, Yaman
    University of Alberta, Canada.
    Claesson, Per M
    RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.
    Nano-scale mechanical and wear properties of a corrosion protective coating reinforced by cellulose nanocrystals – Initiation of coating degradation2021Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 537, artikel-id 147789Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Organic coatings are commonly used for protection of substrate surfaces like metals and wood. In most cases they fulfil their purpose by acting as a barrier against unwanted substances such as oxygen, water or corrosive ions. However, with time coatings fail due to degradation caused by chemical reactions or wear by wind, water, impact of solid particles or sliding motions against other solid objects. In this work we focus on a nanocomposite anticorrosion coating consisting of a hydroxyacrylate-melamine matrix that has been reinforced by a small amount (0.5 wt%) of cellulose nanocrystals. This nanocomposite is of interest as it has shown favourable corrosion protection properties on carbon steel. Here we investigate the nanomechanical and nanowear properties of the coating in air and in water, and we also explore how these properties are affected by exposure to a corrosive 0.1 M NaCl solution. Our data show that the nanomechanical properties of the coating surface is strongly affected by the environment (air or water), and that exposure to the corrosive solution affects the coating surface well before any deterioration of the corrosion protective properties are found. We suggest that our experimental methodology constitutes a powerful way to investigate and understand the initiation of coating degradation. 

  • 7.
    Hellsing, M.
    et al.
    Materiex AB, Sweden.
    Fokine, M.
    RISE., Swedish ICT, Acreo.
    Claesson, Åsa
    RISE., Swedish ICT, Acreo.
    Nilsson, L. -E
    RISE., Swedish ICT, Acreo.
    Margulis, Walter
    RISE., Swedish ICT, Acreo.
    ToF-SIMS imaging of dopant diffusion in optical fibers2003Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 203-204, s. 648-651Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Applications of optical fibers in telecommunication and sensing are rapidly emerging where the fiber properties are related to the controlled addition of dopants such as germanium, phosphorous, fluorine and erbium. The modern ToF-SIMS instrument, with its high sensitivity and high lateral resolution, has shown to be an excellent tool to directly analyze cross-sections of as-manufactured fibers. The present work describes ToF-SIMS imaging of the dopant distribution in fluorine, germanium and rare-earth doped fibers where dopants are confined to a few μm in the core. The increased fluorine diffusion in the fluorine doped fibers due to chemical reactions with hydroxyl groups was examined. This process is utilized in the manufacture of thermally stable chemical composition fiber Bragg gratings. We were able to produce ToF-SIMS elemental images with a lateral resolution around 0.5μm showing the detailed distribution of the dopants.

  • 8. Hellsing, Maja
    et al.
    Fokine, M
    Claesson, Åsa
    RISE., Swedish ICT, Acreo.
    Nilsson, L-E
    Margulis, W
    RISE., Swedish ICT, Acreo.
    Time-of-flight secondary ion mass spectrometry imaging of dopant diffusion in optical fiber2003Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 203-204, s. 3458-61Artikel i tidskrift (Refereegranskat)
  • 9. Höglund, L
    et al.
    Petrini, E
    Asplund, C
    Malm, H
    Andersson, J Y
    RISE., Swedish ICT, Viktoria.
    Holtz, P O
    Optimising uniformity of InAs/(InGaAs)/GaAs quantum dots grown by metal organic vapor phase epitaxy2006Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 252, s. 5525-Artikel i tidskrift (Refereegranskat)
  • 10. Kihlman Åiseth, S
    et al.
    Krozer, A
    RISE., Swedish ICT, Acreo.
    Kasemo, B
    Lausmaa, J
    Surface modification of spin-coated high-density polyethylenefilmas by argon oxygen glow discharge plasma treatments2002Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 202, s. 92-Artikel i tidskrift (Refereegranskat)
  • 11.
    Lausmaa, Jukka
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Funktionella material (KMf).
    Surface modification of spin-coated high-density polyethylene films by argon and oxygen glow discharge treatments2002Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 202, s. 92-103Artikel i tidskrift (Övrigt vetenskapligt)
  • 12.
    Lindahl, Carl
    et al.
    University of Gothenburg, Sweden; Uppsala University, Sweden.
    Xia, Wei
    University of Gothenburg, Sweden; Uppsala University, Sweden.
    Engqvist, Håkan
    University of Gothenburg, Sweden; Uppsala University, Sweden.
    Snis, Anders
    University of Gothenburg, Sweden; Arcam AB, Sweden.
    Lausmaa, Jukka
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Medicinteknik. University of Gothenburg, Sweden.
    Palmquist, Anders
    University of Gothenburg, Sweden.
    Biomimetic calcium phosphate coating of additively manufactured porous CoCr implants2015Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 353, s. 40-47Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this work was to study the feasibility to use a biomimetic method to prepare biomimetic hydroxyapatite (HA) coatings on CoCr substrates with short soaking times and to characterize the properties of such coatings. A second objective was to investigate if the coatings could be applied to porous CoCr implants manufactured by electron beam melting (EBM). The coating was prepared by immersing the pretreated CoCr substrates and EBM implants into the phosphate-buffered solution with Ca2+ in sealed plastic bottles, kept at 60 °C for 3 days. The formed coating was partially crystalline, slightly calcium deficient and composed of plate-like crystallites forming roundish flowers in the size range of 300-500 nm. Cross-section imaging showed a thickness of 300-500 nm. In addition, dissolution tests in Tris-HCl up to 28 days showed that a substantial amount of the coating had dissolved, however, undergoing only minor morphological changes. A uniform coating was formed within the porous network of the additive manufactured implants having similar thickness and morphology as for the flat samples. In conclusion, the present coating procedure allows coatings to be formed on CoCr and could be used for complex shaped, porous implants made by additive manufacturing.

  • 13.
    Mahade, Satyapal
    et al.
    University West, Sweden.
    Ruelle, Celine
    ENSIL, France.
    Curry, Nicholas
    Treibacher Industrie AG, Austria.
    Holmberg, Jonas
    RISE - Research Institutes of Sweden, Material och produktion, IVF.
    Björklund, Stefan
    University West, Sweden.
    Markocsan, Nicholaie
    University West, Sweden.
    Nylén, Per
    University West, Sweden.
    Understanding the effect of material composition and microstructural design on the erosion behavior of plasma sprayed thermal barrier coatings2019Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 488, s. 170-184Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this work, three different TBC compositions comprising of yttria partially stabilized zirconia (8YSZ), yttria fully stabilized zirconia (48YSZ) and gadolinium zirconate (GZ) respectively, were processed by suspension plasma spray (SPS) to obtain columnar microstructured TBCs. Additionally, for comparison, lamellar microstructured, 7YSZ TBC was deposited by air plasma spray (APS) process. SEM analysis was carried out to investigate the microstructure and white light interferometry was used to evaluate the surface morphology of the as-sprayed TBCs. Porosity measurements were made using water intrusion and image analysis methods and it was observed that the SPS-YSZ and APS-YSZ TBCs showed higher porosity content than SPS-GZ and SPS-48YSZ. The as-sprayed TBC variations (APS-YSZ, SPS-YSZ, SPS-GZ, and SPS-48YSZ) were subjected to erosion test. Results indicate that the erosion resistance of APS-YSZ TBC was inferior to the SPS-YSZ, SPS-GZ and SPS-48YSZ TBCs respectively. Among the SPS processed TBCs, SPS-YSZ showed the highest erosion resistance whereas the SPS-48YSZ showed the lowest erosion resistance. SEM analysis of the eroded TBCs (cross section and surface morphology) was performed to gain further insights on their erosion behavior. Based on the erosion results and post erosion SEM analysis, erosion mechanisms for splat like microstructured APS TBC and columnar microstructured SPS TBCs were proposed. The findings from this work provide new insights on the erosion mechanisms of columnar microstructured TBCs and lamellar microstructured TBCs deposited by plasma spray.

  • 14.
    Shafaghat, Hoda
    et al.
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Bioraffinaderi och energi.
    Gulshan, S
    KTH Royal Institute of Technology, Sweden.
    Johansson, Ann-Christine
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Bioraffinaderi och energi.
    Evangelopoulos, Panagiotis
    RISE Research Institutes of Sweden, Samhällsbyggnad, Systemomställning och tjänsteinnovation.
    Yang, W.
    KTH Royal Institute of Technology, Sweden.
    Selective recycling of BTX hydrocarbons from electronic plastic wastes using catalytic fast pyrolysis2022Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 605, artikel-id 154734Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Non-catalytic and catalytic pyrolysis of two waste electrical and electronic equipment (WEEE) fractions, with two different copper contents (low- and medium-grade WEEE named as LGE and MGE, respectively), were performed using micro- and lab-scale pyrolyzers. This research aimed to fundamentally study the feasibility of chemical recycling of the WEEE fractions via pyrolysis process considering molecular interactions at the interfaces of catalyst active sites and WEEE pyrolyzates which significantly influence the chemical functionality of surface intermediates and catalysis by reorganizing the pyrolyzates near catalytic active sites forming reactive surface intermediates. Hence, Al2O3, TiO2, HBeta, HZSM-5 and spent FCC catalysts were used in in-situ micro-scale pyrolysis. Results indicated that HBeta and HZSM-5 zeolites were more suitable than other catalysts for selective production of aromatic hydrocarbons and BTX. High acidity and shape selectivity of zeotype surfaces make them attractive frameworks for catalytic pyrolysis processes aiming for light hydrocarbons like BTX. Meanwhile, the ex-situ pyrolysis of LGE and MGE were carried out using HZSM-5 in micro- and lab-scale pyrolyzers to investigate the effect of pyrolysis configuration on the BTX selectivity. Although the ex-situ pyrolysis resulted in higher formation of BTX from LGE, the in-situ configuration was more efficient to produce BTX from MGE. © 2022 The Author(s)

  • 15.
    Siljeström, Sandra
    et al.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, YKI – Ytkemiska institutet.
    Lausmaa, Jukka
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, YKI – Ytkemiska institutet.
    Hode, T
    Sundin, Mikael
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, YKI – Ytkemiska institutet. RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Sjövall, Peter
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, YKI – Ytkemiska institutet.
    Structural effects of C-60(+) bombardment on various natural mineral samples - Application to analysis of organic phases in geological samples2011Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 257, nr 21, s. 9199-9206Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Organic phases trapped inside natural mineral samples are of considerable interest in astrobiology, geochemistry and geobiology. Examples of such organic phases are microfossils, kerogen and oil. Information about these phases is usually retrieved through bulk crushing of the rock which means both a risk of contamination and that the composition and spatial distribution of the organics to its host mineral is lost. An attractive of way to retrieve information about the organics in the rock is depth profiling using a focused ion beam. Recently, it was shown that it is possible to obtain detailed mass spectrometric information from oil-bearing fluid inclusions, i.e. small amounts of oil trapped inside a mineral matrix, using ToF-SIMS. Using a 10 keV C-60(+) sputter beam and a 25 keV Bi-3(+) analysis beam, oil-bearing inclusions in different minerals were opened and analysed individually. However, sputtering with a C-60(+) beam also induced other changes to the mineral surface, such as formation of topographic features and carbon deposition. In this paper, the cause of these changes is explored and the consequences of the sputter-induced features on the analysis of organic phases in natural mineral samples (quartz, calcite and fluorite) in general and fluid inclusions in particular are discussed. The dominating topographical features that were observed when a several micrometers deep crater is sputtered with 10 keV C-60(+) ions on a natural mineral surface are conical-shaped and ridge-like structures that may rise several micrometers, pointing in the direction of the incident C-60(+) ion beam, on an otherwise flat crater bottom. The sputter-induced structures were found to appear at places with different chemistry than the host mineral, including other minerals phases and fluid inclusions, while structural defects in the host material, such as polishing marks or scratches, did not necessarily result in sputter-induced structures. The ridge-like structures were often covered by a thick layer of deposited carbon. Despite the appearance of the sputter-induced structures and carbon deposition, most oil-bearing inclusions could successfully be opened and analysed. However, smaller inclusion (

  • 16.
    Sjövall, Peter
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Funktionella material (KMf).
    Chemical and structural analysis of the bone-implant interface by TOF-SIMS, SEM, FIB and TEM: Experimental study in animal2012Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 258, nr 17, s. 6485-6494Artikel i tidskrift (Refereegranskat)
  • 17.
    Sjövall, Peter
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Funktionella material (KMf).
    Chemical characterization of combustion deposits by TOF-SIMS2003Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 203, nr 203, s. 669-672Artikel i tidskrift (Övrigt vetenskapligt)
  • 18.
    Tuominen, Mikko
    et al.
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Teisala, Hannu
    Tampere University of Technology, Finland.
    Haapanen, Janne
    Tampere University of Technology, Finland.
    Mäkelä, Jyrki M.
    Tampere University of Technology, Finland.
    Honkanen, Mari
    Tampere University of Technology, Finland.
    Vippola, Minnamari
    Tampere University of Technology, Finland.
    Bardage, Stig
    RISE., SP – Sveriges Tekniska Forskningsinstitut.
    Wålinder, Magnus E. P.
    KTH Royal Institute of Technology, Sweden.
    Swerin, Agne
    RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik. KTH Royal Institute of Technology, Sweden.
    Superamphiphobic overhang structured coating on a biobased material2016Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 389, s. 135-143Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A superamphiphobic coating on a biobased material shows extreme liquid repellency with static contact angles (CA) greater than 150° and roll-off angles less than 10° against water, ethylene glycol, diiodomethane and olive oil, and a CA for hexadecane greater than 130°. The coating consisting of titania nanoparticles deposited by liquid flame spray (LFS) and hydrophobized using plasma-polymerized perfluorohexane was applied to a birch hardwood. Scanning electron microscopy (SEM) imaging after sample preparation by UV laser ablation of coated areas revealed that capped structures were formed and this, together with the geometrically homogeneous wood structure, fulfilled the criteria for overhang structures to occur. The coating showed high hydrophobic durability by still being non-wetted after 500 000 water drop impacts, and this is discussed in relation to geometrical factors and wetting forces. The coating was semi-transparent with no significant coloration. A self-cleaning effect was demonstrated with both water and oil droplets. A self-cleanable, durable and highly transparent superamphiphobic coating based on a capped overhang structure has a great potential for commercial feasibility in a variety of applications, here exemplified for a biobased material.

  • 19.
    Yin, Haiyan
    et al.
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign. KTH Royal Institute of Technology, Sweden.
    Sedighi Moghaddam, Maziar
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Tuominen, Mikko
    RISE Research Institutes of Sweden.
    Dėdinaitė, Andra
    RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.
    Wålinder, Magnus
    KTH Royal Institute of Technology, Sweden.
    Swerin, Agne
    Karlstad University, Sweden.
    Wettability performance and physicochemical properties of UV exposed superhydrophobized birch wood2022Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 584, artikel-id 152528Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The effect of prolonged ultraviolet (UV) irradiation on the performance of superhydrophobized birch and acetylated birch wood was investigated. The surface modification of the wood was based on a newly developed method using silicone nanofilaments. The combination of surface modification and acetylation of wood showed good wetting resistance also after 600 h of UV exposure, with water contact angles greater than 140° and water uptake 30 times lower by weight than that of the non-surface-modified wood as determined by multicycle Wilhelmy plate measurements. Scanning electron microscopy images revealed that the silicone nanofilaments can still be observed on the wood samples after UV irradiation. The surface-modified wood samples exhibited significant color change after UV exposure. FTIR spectra showed that lignin was degraded on both the non-surface-modified wood surfaces and the wood surface-modified with the silicone nanofilaments. © 2022 The Authors

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