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  • 1.
    Altmann, Brigitte
    et al.
    University of Freiburg, Germany.
    Karygianni, Lamprini
    University of Freiburg, Germany.
    Al-Ahmad, Ali
    University of Freiburg, Germany.
    Butz, Frank
    University of Freiburg, Germany.
    Bächle, Maria
    University of Freiburg, Germany.
    Adolfsson, Erik
    RISE - Research Institutes of Sweden, Material och produktion, IVF.
    Fürderer, Tobias
    Courtois, Nicolas
    Palmero, Paola
    Politecnico di Torino, Italy.
    Follo, Marie
    University of Freiburg, Germany.
    Chevalier, Jérôme
    Université de Lyon, France.
    Steinberg, Thorsten
    University of Freiburg, Germany.
    Kohal, Ralf Joachim
    University of Freiburg, Germany.
    Assessment of Novel Long-Lasting Ceria-Stabilized Zirconia-Based Ceramics with Different Surface Topographies as Implant Materials2017Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 27, nr 40, artikkel-id 1702512Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The development of long-lasting zirconia-based ceramics for implants, which are not prone to hydrothermal aging, is not satisfactorily solved. Therefore, this study is conceived as an overall evaluation screening of novel ceria-stabilized zirconia-alumina-aluminate composite ceramics (ZA8Sr8-Ce11) with different surface topographies for use in clinical applications. Ceria-stabilized zirconia is chosen as the matrix for the composite material, due to its lower susceptibility to aging than yttria-stabilized zirconia (3Y-TZP). This assessment is carried out on three preclinical investigation levels, indicating an overall biocompatibility of ceria-stabilized zirconia-based ceramics, both in vitro and in vivo. Long-term attachment and mineralized extracellular matrix (ECM) deposition of primary osteoblasts are the most distinct on porous ZA8Sr8-Ce11p surfaces, while ECM attachment on 3Y-TZP and ZA8Sr8-Ce11 with compact surface texture is poor. In this regard, the animal study confirms the porous ZA8Sr8-Ce11p to be the most favorable material, showing the highest bone-to-implant contact values and implant stability post implantation in comparison with control groups. Moreover, the microbiological evaluation reveals no favoritism of biofilm formation on the porous ZA8Sr8-Ce11p when compared to a smooth control surface. Hence, together with the in vitro in vivo assessment analogy, the promising clinical potential of this novel ZA8Sr8-Ce11 as an implant material is demonstrated. 

  • 2. Andersson, P
    et al.
    Forchheimer, R
    Tehrani, P
    Berggren, M
    RISE., Swedish ICT, Acreo.
    Printable All-Organic Electrochromic Active-Matrix Displays2007Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 17, nr 16, s. 3074-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    All-organic active matrix addressed displays based on electrochemical smart pixels made on flexible substrates are reported. Each individual smart pixel device combines an electrochemical transistor with an electrochromic display cell, thus resulting in a low-voltage operating robust display technology. Poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(styrenesulfonate) (PSS) served as the active material in the electrochemical smart pixels, as well as the conducting lines, of the monolithically integrated active-matrix display. Different active-matrix display addressing schemes have been investigated a matrix display fill factor of 65€‰% was reached. This is achieved by combining a three-terminal electrochemical transistor with an electrochromic display cell architecture, in which an additional layer of PEDOT:PSS was placed on top of the display cell counter electrode. In addition, we have evaluated different kinds of electrochromic polymer materials aiming at reaching a high color switch contrast. This work has been carried out in the light of achieving a robust display technology that is easily manufactured using a standard label printing press, which forced us to use the fewest different materials as well as avoiding exotic complex device architectures. Together, this yields a manufacturing process of only five discrete patterning steps, which in turn promise for that the active matrix addressed displays can be manufactured on paper or plastic substrates in a roll-to-roll production procedure._x000D_

  • 3. Blaudeck, T
    et al.
    Andersson Ersman, Peter
    RISE., Swedish ICT, Acreo.
     Sandberg, M
    RISE., Swedish ICT, Acreo.
    Heinz, S
    Laiho, A
     Liu, J
    Engquist, I
    Berggren, M
     Baumann, R R
    Simplified Large-Area Manufacturing of Organic Electrochemical Transistors Combining Printing a Self-Aligning Laser Ablation Step2012Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 22, s. 2939-48Artikkel i tidsskrift (Fagfellevurdert)
  • 4.
    Corrales-Pérez, Belén
    et al.
    ICMM Instituto de Ciencia de Materiales de Madrid, Spain.
    Díaz-Ufano, Carlos
    ICMM Instituto de Ciencia de Materiales de Madrid, Spain.
    Salvador, María
    ICMM Instituto de Ciencia de Materiales de Madrid, Spain; University of Oviedo, Spain.
    Santana-Otero, Antonio
    ICMM Instituto de Ciencia de Materiales de Madrid, Spain.
    Veintemillas-Verdaguer, Sabino
    ICMM Instituto de Ciencia de Materiales de Madrid, Spain.
    Beni, Valerio
    RISE Research Institutes of Sweden, Digitala system, Smart hårdvara.
    Morales, María del Puerto
    ICMM Instituto de Ciencia de Materiales de Madrid, Spain.
    Alternative Metallic Fillers for the Preparation of Conductive Nanoinks for Sustainable Electronics2024Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The development of electronics with net zero carbon emissions through more efficient and environmentally friendly materials and processes is still a challenge. Here, alternative chemical synthesis routes of metal conductive nanoparticles, based on biodegradable materials are explored, such as nickel, iron–nickel alloy and iron nanoparticles, to be used, in the long term, as fillers in inks for inject printing. Thus, Ni and FeNi metal nanoparticles of 25–12 nm, forming aggregates of 614–574 nm, respectively, are synthesized in water in the presence of a polyol and a reducing agent and under microwave heating that enables a more uniform and fast heating. Iron nanoparticles of 120 ± 40 nm are synthesized in polyol that limits the aggregation and the oxidation degree. Commercial metal nanoparticles of iron and nickel, are coated with ethylene glycol and used for comparison. The conductivity of nanoparticles when pressed into pellets remains similar for both commercial and synthesized samples. However, when deposited on a strip line and heated, synthesized Ni, FeNi, and Fe nanoparticles show significant conductivity and interesting magnetic properties. It is demonstrated that the nanosize facilitates sintering at reduced temperatures and the capping agents prevent oxidation, resulting in promising conductive fillers for printed electronic applications. 

    Fulltekst (pdf)
    fulltext
  • 5.
    Françon, Hugo
    et al.
    KTH Royal Institute of Technology, Sweden.
    Wang, Zhen
    KTH Royal Institute of Technology, Sweden.
    Marais, Andrew
    KTH Royal Institute of Technology, Sweden.
    Mystek, Katarzyna
    KTH Royal Institute of Technology, Sweden.
    Piper, Andrew
    KTH Royal Institute of Technology, Sweden.
    Granberg, Hjalmar
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Massa, papper och förpackningar.
    Malti, Abdellah
    KTH Royal Institute of Technology, Sweden.
    Gatenholm, Paul
    Chalmers University of Technology, Sweden.
    Larsson, Per
    KTH Royal Institute of Technology, Sweden.
    Wågberg, Lars
    KTH Royal Institute of Technology, Sweden.
    Ambient-Dried, 3D-Printable and Electrically Conducting Cellulose Nanofiber Aerogels by Inclusion of Functional Polymers2020Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, artikkel-id 1909383Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This study presents a novel, green, and efficient way of preparing crosslinked aerogels from cellulose nanofibers (CNFs) and alginate using non-covalent chemistry. This new process can ultimately facilitate the fast, continuous, and large-scale production of porous, light-weight materials as it does not require freeze-drying, supercritical CO2 drying, or any environmentally harmful crosslinking chemistries. The reported preparation procedure relies solely on the successive freezing, solvent-exchange, and ambient drying of composite CNF-alginate gels. The presented findings suggest that a highly-porous structure can be preserved throughout the process by simply controlling the ionic strength of the gel. Aerogels with tunable densities (23–38 kg m−3) and compressive moduli (97–275 kPa) can be prepared by using different CNF concentrations. These low-density networks have a unique combination of formability (using molding or 3D-printing) and wet-stability (when ion exchanged to calcium ions). To demonstrate their use in advanced wet applications, the printed aerogels are functionalized with very high loadings of conducting poly(3,4-ethylenedioxythiophene):tosylate (PEDOT:TOS) polymer by using a novel in situ polymerization approach. In-depth material characterization reveals that these aerogels have the potential to be used in not only energy storage applications (specific capacitance of 78 F g−1), but also as mechanical-strain and humidity sensors. © 2020 The Authors. 

  • 6.
    Garemark, Jonas
    et al.
    KTH Royal Institute of Technology, Sweden.
    Ram, Farsa
    KTH Royal Institute of Technology, Sweden.
    Liu, Lianlian
    KTH Royal Institute of Technology, Sweden.
    Sapouna, Ioanna
    KTH Royal Institute of Technology, Sweden.
    Cortes Ruiz, Maria
    KTH Royal Institute of Technology, Sweden.
    Larsson, Per Tomas
    RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.
    Li, Yuanyuan
    KTH Royal Institute of Technology, Sweden.
    Advancing Hydrovoltaic Energy Harvesting from Wood through Cell Wall Nanoengineering2023Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 33, nr 4, artikkel-id 2208933Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Converting omnipresent environmental energy through the assistance of spontaneous water evaporation is an emerging technology for sustainable energy systems. Developing bio-based hydrovoltaic materials further pushes the sustainability, where wood is a prospect due to its native hydrophilic and anisotropic structure. However, current wood-based water evaporation-assisted power generators are facing the challenge of low power density. Here, an efficient hydrovoltaic wood power generator is reported based on wood cell wall nanoengineering. A highly porous wood with cellulosic network filling the lumen is fabricated through a green, one-step treatment using sodium hydroxide to maximize the wood surface area, introduce chemical functionality, and enhance the cell wall permeability of water. An open-circuit potential of ≈140 mV in deionized water is realized, over ten times higher than native wood. Further tuning the pH difference between wood and water, due to an ion concentration gradient, a potential up to 1 V and a remarkable power output of 1.35 µW cm−2 is achieved. The findings in this study provide a new strategy for efficient wood power generators. © 2022 The Authors. 

  • 7.
    Gerasimov, Jennifer
    et al.
    Linköping University, Sweden.
    Halder, Arnnab
    Linköping University, Sweden.
    Mousa, Abdelrazek
    University of Gothenburg, Sweden.
    Ghosh, Sarbani
    Birla Institute of Technology and Science, India.
    Harikesh, Pardinhabe
    Linköping University, Sweden.
    Abrahamsson, Tobias
    Linköping University, Sweden.
    Bliman, David
    University of Gothenburg, Sweden.
    Strandberg, Jan
    RISE Research Institutes of Sweden, Digitala system, Smart hårdvara.
    Massetti, Matteo
    Linköping University, Sweden.
    Zozoulenko, Igor
    Linköping University, Sweden.
    Simon, Daniel
    Linköping University, Sweden.
    Berggren, Magnus
    Linköping University, Sweden.
    Olsson, Roger
    Lund University, Sweden; University of Gothenburg, Sweden.
    Fabiano, Simone
    Linköping University, Sweden.
    Rational Materials Design for In Operando Electropolymerization of Evolvable Organic Electrochemical Transistors2022Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 32, artikkel-id 2202292Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Organic electrochemical transistors formed by in operando electropolymerization of the semiconducting channel are increasingly becoming recognized as a simple and effective implementation of synapses in neuromorphic hardware. However, very few studies have reported the requirements that must be met to ensure that the polymer spreads along the substrate to form a functional conducting channel. The nature of the interface between the substrate and various monomer precursors of conducting polymers through molecular dynamics simulations is investigated, showing that monomer adsorption to the substrate produces an increase in the effective monomer concentration at the surface. By evaluating combinatorial couples of monomers baring various sidechains with differently functionalized substrates, it is shown that the interactions between the substrate and the monomer precursor control the lateral growth of a polymer film along an inert substrate. This effect has implications for fabricating synaptic systems on inexpensive, flexible substrates. © 2022 The Authors. 

  • 8.
    Granskog, Viktor
    et al.
    KTH Royal Institute of Technology, Sweden.
    García-Gallego, Sandra
    KTH Royal Institute of Technology, Sweden.
    von Kieseritzky, Johanna
    Karolinska Institutet, Sweden.
    Rosendahl, Jennifer
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Kemi och material.
    Stenlund, Patrik
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Kemi och material.
    Zhang, Yuning
    KTH Royal Institute of Technology, Sweden.
    Petronis, Sarunas
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Kemi och material.
    Lyvén, Benny
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Kemi och material.
    Arner, Marianne
    Karolinska Institutet, Sweden.
    Håkansson, Joakim
    RISE - Research Institutes of Sweden (2017-2019), Biovetenskap och material, Kemi och material.
    Malkoch, Michael
    KTH Royal Institute of Technology, Sweden.
    High-Performance Thiol–Ene Composites Unveil a New Era of Adhesives Suited for Bone Repair2018Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 28, nr 26, artikkel-id 1800372Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The use of adhesives for fracture fixation can revolutionize the surgical procedures toward more personalized bone repairs. However, there are still no commercially available adhesive solutions mainly due to the lack of biocompatibility, poor adhesive strength, or inadequate fixation protocols. Here, a surgically realizable adhesive system capitalizing on visible light thiol–ene coupling chemistry is presented. The adhesives are carefully designed and formulated from a novel class of chemical constituents influenced by dental resin composites and self-etch primers. Validation of the adhesive strength is conducted on wet bone substrates and accomplished via fiber-reinforced adhesive patch (FRAP) methodology. The results unravel, for the first time, on the promise of a thiol–ene adhesive with an unprecedented shear bond strength of 9.0 MPa and that surpasses, by 55%, the commercially available acrylate dental adhesive system Clearfil SE Bond of 5.8 MPa. Preclinical validation of FRAPs on rat femur fracture models details good adhesion to the bone throughout the healing process, and are found biocompatible not giving rise to any inflammatory response. Remarkably, the FRAPs are found to withstand loads up to 70 N for 1000 cycles on porcine metacarpal fractures outperforming clinically used K-wires and match metal plates and screw implants.

    Fulltekst (pdf)
    fulltext
  • 9.
    Hutchinson, Daniel
    et al.
    KTH Royal Institute of Technology, Sweden.
    Granskog, Viktor
    KTH Royal Institute of Technology, Sweden.
    von Kieseritzky, Johanna
    Karolinska Institute, Sweden.
    Alfort, Henrik
    Karolinska Institute, Sweden.
    Stenlund, Patrik
    RISE Research Institutes of Sweden, Material och produktion, Kemi, biomaterial och textil.
    Zhang, Yuning
    KTH Royal Institute of Technology, Sweden.
    Arner, Marianne
    Karolinska Institute, Sweden.
    Håkansson, Joakim
    RISE Research Institutes of Sweden, Material och produktion, Kemi, biomaterial och textil. University of Gothenburg, Sweden.
    Malkoch, Michael
    KTH Royal Institute of Technology, Sweden.
    Highly Customizable Bone Fracture Fixation through the Marriage of Composites and Screws2021Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 31, nr 41, artikkel-id 2105187Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Open reduction internal fixation (ORIF) metal plates provide exceptional support for unstable bone fractures; however, they often result in debilitating soft-tissue adhesions and their rigid shape cannot be easily customized by surgeons. In this work, a surgically feasible ORIF methodology, called AdhFix, is developed by combining screws with polymer/hydroxyapatite composites, which are applied and shaped in situ before being rapidly cured on demand via high-energy visible-light-induced thiol–ene coupling chemistry. The method is developed on porcine metacarpals with transverse and multifragmented fractures, resulting in strong and stable fixations with a bending rigidity of 0.28 (0.03) N m2 and a maximum load before break of 220 (15) N. Evaluations on human cadaver hands with proximal phalanx fractures show that AdhFix withstands the forces from finger flexing exercises, while short- and long-term in vivo rat femur fracture models show that AdhFix successfully supports bone healing without degradation, adverse effects, or soft-tissue adhesions. This procedure represents a radical new approach to fracture fixation, which grants surgeons unparalleled customizability and does not result in soft-tissue adhesions. © 2021 The Authors.

  • 10. Kettunen, M.
    et al.
    Silvennoinen, R.J.
    Houbenov, N.
    Nykänen, A.
    Ruokolainen, J.
    Sainio, J.
    Pore, V.
    Kemell, M.
    Ankerfors, M.
    RISE., Innventia.
    Lindström, T.
    RISE., Innventia.
    Ritala, M.
    Photoswitchable superabsorbency based on nanocellulose aerogels2011Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, nr 3, s. 510-517Artikkel i tidsskrift (Fagfellevurdert)
  • 11.
    Lindahl, Niklas
    et al.
    Chalmers University of Technology, Sweden; .
    Bitenc, Jan
    Dominko, Robert
    Johansson, Patrik
    Aluminum Metal–Organic Batteries with Integrated 3D Thin Film Anodes2020Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 30, nr 51Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Abstract Aluminum 3D thin film anodes fully integrated with a separator are fabricated by sputtering and enable rechargeable aluminum metal batteries with high power performance. The 3D thin film anodes have an approximately four to eight times larger active surface area than a metal foil, which significantly both reduces the electrochemical overpotential, and improves materials utilization. In full cells with organic cathodes, that is, aluminum metal?organic batteries, the 3D thin film anodes provide 165 mAh g?1 at 0.5 C rate, with a capacity retention of 81% at 20 C, and 86% after 500 cycles. Post-mortem analysis reveals structural degradation to limit the long-term stability at high rates. As the multivalent charge carrier active here is AlCl2+, the realistic maximal specific energy, and power densities at cell level are ≈100 Wh kg?1 and ≈3100 W kg?1, respectively, which is significantly higher than the state-of-the-art for Al batteries.

  • 12.
    Makhinia, Anatolii
    et al.
    RISE Research Institutes of Sweden, Digitala system, Smart hårdvara. Linköping University, Sweden.
    Bynens, Lize
    Hasselt University, Belgium.
    Goossens, Arwin
    Hasselt University, Belgium.
    Deckers, Jasper
    Hasselt University, Belgium; .
    Lutsen, Laurence
    Hasselt University, Belgium; .
    Vandewal, Koen
    Hasselt University, Belgium; .
    Maes, Wouter
    Hasselt University, Belgium; .
    Beni, Valerio
    RISE Research Institutes of Sweden, Digitala system, Smart hårdvara.
    Andersson Ersman, Peter
    RISE Research Institutes of Sweden, Digitala system, Smart hårdvara.
    Toward Sustainability in All-Printed Accumulation Mode Organic Electrochemical Transistors2024Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Abstract This study reports on the first all-printed vertically stacked organic electrochemical transistors (OECTs) operating in accumulation mode; the devices, relying on poly([4,4?-bis(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-2,2?-bithiophen-5,5?-diyl]-alt-[thieno[3,2-b]thiophene-2,5-diyl]) (pgBTTT) as the active channel material, are fabricated via a combination of screen and inkjet printing technologies. The resulting OECTs (W/L ≈5) demonstrate good switching performance; gm, norm ≈13 mS cm?1, µC* ≈21 F cm?1 V?1 s?1, ON?OFF ratio > 104 and good cycling stability upon continuous operation for 2 h. The inkjet printing process of pgBTTT is established by first solubilizing the polymer in dihydrolevoglucosenone (Cyrene), a non-toxic, cellulose-derived, and biodegradable solvent. The resulting ink formulations exhibit good jettability, thereby providing reproducible and stable p-type accumulation mode all-printed OECTs with high performance. Besides the environmental and safety benefits of this solvent, this study also demonstrates the assessment of how the solvent affects the performance of spin-coated OECTs, which justifies the choice of Cyrene as an alternative to commonly used harmful solvents such as chloroform, also from a device perspective. Hence, this approach shows a new possibility of obtaining more sustainable printed electronic devices, which will eventually result in all-printed OECT-based logic circuits operating in complementary mode.

    Fulltekst (pdf)
    fulltext
  • 13.
    Manca, Nicola
    et al.
    CNR-SPIN, Italy.
    Kalaboukhov, Alexei
    Chalmers University of Technology, Sweden.
    Plaza, Alejandro E.
    CNR-SPIN, Italy.
    Cichetto, Leonélio
    CNR-SPIN, Italy.
    Wahlberg, Eric
    RISE Research Institutes of Sweden, Säkerhet och transport, Mätteknik. Chalmers University of Technology, Sweden.
    Bellingeri, Emilio
    CNR-SPIN, Italy.
    Bisio, Francesco
    CNR-SPIN, Italy.
    Lombardi, Floriana
    Chalmers University of Technology, Sweden.
    Marré, Daniele
    CNR-SPIN, Italy; Università degli Studi di Genova, Italy.
    Pellegrino, Luca
    CNR-SPIN, Italy.
    Integration of High-Tc Superconductors with High-Q-Factor Oxide Mechanical Resonators2024Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Micro-mechanical resonators are building blocks of a variety of applications in basic science and consumer electronics. This device technology is mainly based on well-established and reproducible silicon-based fabrication processes with outstanding performances in term of mechanical Q-factor and sensitivity to external perturbations. Broadening the functionalities of micro-electro-mechanical systems (MEMS) by the integration of functional materials is a key step for both applied and fundamental science. However, combining functional materials with silicon-based devices is challenging. An alternative approach is directly fabricating MEMS based on compounds inherently showing non-trivial functional properties, such as transition metal oxides. Here, a full-oxide approach is reported, where a high- (Formula presented.) superconductor YBa2Cu3O7 (YBCO) is integrated with high Q-factor micro-bridge resonators made of single-crystal LaAlO3 (LAO) thin films. LAO resonators are tensile strained, with a stress of about 350 MPa, show a Q-factor above 200k, and have low roughness. YBCO overlayers are grown ex situ by pulsed laser deposition and YBCO/LAO bridges show zero resistance below 78 K and mechanical properties similar to those of bare LAO resonators. These results open new possibilities toward the development of advanced transducers, such as bolometers or magnetic field detectors, as well as experiments in solid state physics, material science, and quantum opto-mechanics. 

  • 14.
    Nicolas-Boluda, A.
    et al.
    Université de Paris, France.
    Yang, Z.
    Shandong University, China.
    Dobryden, Illia
    KTH Royal Institute of Technology, Sweden.
    Carn, F.
    Université de Paris, France.
    Winckelmans, N.
    University of Antwerp, Belgium.
    Péchoux, C.
    Université Paris-Saclay, France.
    Bonville, P.
    Université Paris-Saclay, France.
    Bals, S.
    University of Antwerp, Belgium .
    Claesson, Per M
    RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.
    Gazeau, F.
    Université de Paris, France.
    Pileni, M. P.
    Sorbonne Université, France.
    Intracellular Fate of Hydrophobic Nanocrystal Self-Assemblies in Tumor Cells2020Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 30, nr 40, artikkel-id 2004274Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Control of interactions between nanomaterials and cells remains a biomedical challenge. A strategy is proposed to modulate the intralysosomal distribution of nanoparticles through the design of 3D suprastructures built by hydrophilic nanocrystals (NCs) coated with alkyl chains. The intracellular fate of two water-dispersible architectures of self-assembled hydrophobic magnetic NCs: hollow deformable shells (colloidosomes) or solid fcc particles (supraballs) is compared. These two self-assemblies display increased cellular uptake by tumor cells compared to dispersions of the water-soluble NC building blocks. Moreover, the self-assembly structures increase the NCs density in lysosomes and close to the lysosome membrane. Importantly, the structural organization of NCs in colloidosomes and supraballs are maintained in lysosomes up to 8 days after internalization, whereas initially dispersed hydrophilic NCs are randomly aggregated. Supraballs and colloidosomes are differently sensed by cells due to their different architectures and mechanical properties. Flexible and soft colloidosomes deform and spread along the biological membranes. In contrast, the more rigid supraballs remain spherical. By subjecting the internalized suprastructures to a magnetic field, they both align and form long chains. Overall, it is highlighted that the mechanical and topological properties of the self-assemblies direct their intracellular fate allowing the control intralysosomal density, ordering, and localization of NCs. 

  • 15.
    Persson, K. M.
    et al.
    Linköping University, Sweden.
    Lönnqvist, S.
    Linköping University, Sweden.
    Tybrandt, K.
    Linköping University, Sweden; ETH Zurich, Switzerland.
    Gabrielsson, R.
    Linköping University, Sweden.
    Nilsson, David
    RISE., Swedish ICT, Acreo.
    Kratz, G.
    Linköping University, Sweden.
    Berggren, M.
    Linköping University, Sweden.
    Matrix Addressing of an Electronic Surface Switch Based on a Conjugated Polyelectrolyte for Cell Sorting2015Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 25, nr 45, s. 7056-7063Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Spatial control of cell detachment is potentially of great interest when selecting cells for clonal expansion and in order to obtain a homogeneous starting population of cells aimed for tissue engineering purposes. Here, selective detachment and cell sorting of human primary keratinocytes and fibroblasts is achieved using thin films of a conjugated polymer. Upon electrochemical oxidation, the polymer film swells, cracks, and finally detaches taking cells cultured on top along with it. The polymer can be patterned using standard photolithography to fabricate a cross-point matrix with polymer pixels that can be individually addressed and thus detached. Detachment occurs above a well-defined threshold of +0.7 V versus Ag/AgCl, allowing the use of a relatively simple and easily manufactured passive matrix-addressing configuration, based on a resistor network, to control the cell-sorting device. Selective and electronically controlled cell detachment is achieved using a conjugated polymer that detaches when electrochemically oxidized. The polymer is patterned to create a matrix with individually addressable pixels. The addressing is based on passive matrix addressing and is controlled by a resistance network. Human skin cells are cultured on the matrix, show good viability, and can be selectively detached.

  • 16.
    Zendejas Medina, León
    et al.
    Uppsala University, Sweden.
    Mølmen, Live
    RISE Research Institutes of Sweden, Säkerhet och transport, Elektrifiering och pålitlighet. Jönköping University, Sweden.
    Paschalidou, Eirini-Maria
    Uppsala University, Sweden.
    Donzel-Gargand, Olivier
    Uppsala University, Sweden.
    Leisner, Peter
    Jönköping University, Sweden.
    Jansson, Ulf
    Uppsala University, Sweden.
    Nyholm, Leif
    Uppsala University, Sweden.
    Extending the Passive Region of CrFeNi-Based High Entropy Alloys2023Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 33, nr 51, artikkel-id 2307897Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This study provides principles for designing new corrosion resistant high entropy alloys. The theoretical framework is a percolation model developed by Newman and Sieradzki that predicts the ability of an alloy to passivate, i.e., to form a protective surface oxide, based on its composition. Here, their model is applied to more complex materials than previously, namely amorphous CrFeNiTa and CrFeNiW alloys. Furthermore, the model describes a more complex passivation process: reforming the oxide layer above the transpassive potential of Cr. The model is used to predict the lowest concentration of Ta or W required to extend the passive region, yielding 11–14 at% Ta and 14–17 at% W. For CrFeNiTa, experiments reveal a threshold value of 13–15 at% Ta, which agrees with the prediction. For CrFeNiW, the experimentally determined threshold value is 37–45 at% W, far above the predicted value. Further investigations explore why the percolation model fails to describe the CrFeNiW system; key factors are the higher nobility and the pH sensitivity of W. These results demonstrate some limitations of the percolation model and offer complementary passivation criteria, while providing a design route for combining the properties of the 3d transition metal and refractory metal groups. 

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