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  • 751.
    Zhang, Andy Zhenzhong
    et al.
    RISE, Swedish ICT, Acreo. Ascatron AB, Sweden.
    Reshanov, Sergey A.
    Ascatron AB, Sweden.
    Schöner, Adolf
    Ascatron AB, Sweden.
    Kaplan, Wlodek
    Ascatron AB, Sweden.
    Kwietniewski, Norbert
    Warsaw University of Technology, Poland.
    Lim, Jang-Kwon
    RISE, Swedish ICT, Acreo.
    Bakowski, Mietek
    RISE, Swedish ICT, Acreo.
    Planarization of epitaxial SiC trench structures by plasma ion etching2015In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 821-823, p. 549-552Article in journal (Refereed)
    Abstract [en]

    In this work, we present a planarization concept for epitaxial SiC trench structures involving reactive ion etching (RIE) and inductive coupled plasma (ICP) dry etching. The general idea is to transfer the flat surface from spun-on BCB/photo-resist layers to deposited silicon dioxide and finally to bulk SiC by applying process conditions with the same etch rate for the different materials. In this way several microns of unwanted material can be removed and planar SiC surfaces are obtained. With this method trench structures filled by epitaxial re-growth can be planarized with smooth surfaces and good homogeneity over the wafer. Cost-efficient device manufacturing can be achieved by using standard semiconductor process equipment. This technology makes it possible to manufacture advanced epitaxial SiC material structures for devices such as trench JBS diodes and double-gate trench JFETs.

  • 752.
    Zhang, Yafan
    et al.
    RISE, Swedish ICT, Acreo. Jönköping University, Sweden; KTH Royal Institute of Technology, Sweden.
    Belov, Ilja
    Jönköping University, Sweden.
    Sarius, Niklas G.
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Bakowski, Mietek
    Jönköping University, Sweden.
    Nee, Hans Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut. Jönköping University, Sweden.
    Leisner, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik. KTH Royal Institute of Technology, Sweden.
    Thermal evaluation of a liquid/air cooled integrated power inverter for hybrid vehicle applications2014In: 14th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2013, 2014, , p. 6529944article id 6529944Conference paper (Refereed)
    Abstract [en]

    A thermal design of an integrated double-side cooled SiC 50kW-1200V-200A power inverter for hybrid electric vehicle applications has been proposed to enable cooling in two different automotive operating environments: under-hood and controlled temperature environment of passenger compartment. The power inverter is integrated with air/liquid cooled cold plates equipped with finned channels. Concept evaluation and CFD model calibration have been performed on a simplified thermal prototype. Computational experiments on the detailed model of the inverter, including packaging materials, have been performed for automotive industry defined application scenarios, including two extreme and one typical driving cycles. For the studied applicationscenarios the case temperature of the SiC transistors and diodes have been found to be below 210°C. The maximum steady-state temperature of the DC-link capacitor has been below 127 °C for the worst-case scenario including liquid cooling, and up to 140 °C for the worst-case scenario with air-cooling.

  • 753.
    Zhao, Wei
    et al.
    RISE, Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Zhao, Yichen
    KTH Royal Institute of Technology, Sweden.
    Karlsson, Mikael
    RISE, Swedish ICT, Acreo.
    Wang, Qin
    RISE, Swedish ICT, Acreo.
    Toprak, Muhammet S.
    KTH Royal Institute of Technology, Sweden.
    Evaluation of Zinc Oxide Nano-Microtetrapods for Biomolecule2015In: Micro+Nano Materials, Devices, and Systems / [ed] Benjamin J. Eggleton, Stefano Palomba, 2015, Vol. 9668, article id 966833Conference paper (Refereed)
    Abstract [en]

    Zinc oxide tetrapods (ZnO-Ts) were synthesized by flame transport synthesis using Zn microparticles. This work herein reports a systematical study on the structural, optical and electrochemical properties of the ZnO-Ts. The morphology of the ZnO-Ts was confirmed by scanning electron microscopy (SEM) as joint structures of four nano-microstructured legs, of which the diameter of each leg is 0.7-2.2 μm in average from the tip to the stem. The ZnO-Ts were dispersed in glucose solution to study the luminescence as well as photocatalytic activity in a mimicked biological environment. The photoluminescence (PL) intensity in the ultraviolet (UV) region quenches with linear dependence to increased glucose concentration up to 4 mM. The ZnO-Ts were also attached with glucose oxidase (GOx) and over coated with a thin film of Nafion to form active layers for electrochemical glucose sensing. The attachment of GOx and coating of Nafion were confirmed by infrared spectroscopy (FT-IR). Furthermore, the current response of the active layers based on ZnO-Ts was investigated by cyclic voltammetry (CV) in various glucose concentrations. Stable current response of glucose was detected with linear dependence to glucose concentration up to 12 mM, which confirms the potential of ZnO-Ts for biomolecule sensing applications.

  • 754. Zhao, Y
    et al.
    Sugunan, A
    Rihtnesberg, D B
    Wang, Q
    RISE, Swedish ICT, Acreo.
    Toprak, M S
    Muhammed, M
    Size-tuneable synthesis of photoconducting poly-(3-hexylthiophene) nanofibres nanocomposites2012In: Phys. Status Solidi, Vol. c9, no 7, p. 1546-50Article in journal (Refereed)
  • 755.
    Zhao, Yichen
    et al.
    KTH Royal Institute of Technology, Sweden.
    Sugunan, Abhilash
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Wang, Qin
    RISE, Swedish ICT, Acreo.
    Yang, Xuran
    KTH Royal Institute of Technology, Sweden.
    Rihtnesberg, David B.
    RISE, Swedish ICT, Acreo.
    Toprak, Muhammet S.
    KTH Royal Institute of Technology, Sweden.
    Direct Determination of Spatial Localization of Carriers in CdSe-CdS Quantum Dots2015In: Journal of Nanomaterials, ISSN 1687-4110, E-ISSN 1687-4129, Vol. 2015, article id 321354Article in journal (Refereed)
    Abstract [en]

    Colloidal quantum dots (QDs) have gained significant attention due to their tunable band gap, simple solution processability, ease of scale-up, and low cost. By carefully choosing the materials, core-shell heterostructure QDs (HQDs) can be further synthesized with a controlled spatial spread of wave functions of the excited electrons and holes for various applications. Many investigations have been done to understand the exciton dynamics by optical characterizations. However, these spectroscopic data demonstrate that the spatial separation of the excitons cannot distinguish the distribution of excited electrons and holes. In this work, we report a simple and direct method to determine the localized holes and delocalized electrons in HQDs. The quasi-type-II CdSe-CdS core-shell QDs were synthesized via a thermolysis method. Poly(3-hexylthiophene) (P3HT) nanofiber and ZnO nanorods were selected as hole and electron conductor materials, respectively, and were combined with HQDs to form two different nanocomposites. Photoelectrical properties were evaluated under different environments via a quick and facile characterization method, confirming that the electrons in the HQDs were freely accessible at the surface of the nanocrystal, while the holes were confined within the CdSe core.

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  • 756.
    Zhybak, Mykhailo T.
    et al.
    National Academy of Sciences of Ukraine, Ukraine; Linköping University, Sweden.
    Vagin, Mikhail Yu.
    Linköping University, Sweden.
    Beni, Valerio
    RISE, Swedish ICT, Acreo.
    Liu, Xianjie
    Linköping University, Sweden.
    Dempsey, Eithne
    Institute of Technology Tallaght, Ireland.
    Turner, Anthony P. F.
    Linköping University, Sweden.
    Korpan, Yaroslav I.
    National Academy of Sciences of Ukraine, Ukraine.
    Direct detection of ammonium ion by means of oxygen electrocatalysis at a copper-polyaniline composite on a screen-printed electrode2016In: Microchimica Acta, ISSN 0026-3672, E-ISSN 1436-5073, Vol. 183, no 6, p. 1981-1987Article in journal (Refereed)
    Abstract [en]

    We describe a composite material for use in electrochemical oxygen reduction. A screen-printed electrode (SPE) was consecutively modified with electrodeposited copper, a Nafion membrane and electropolymerized polyaniline (PANi) to give an electrocatalytic composite of type PANi/Nafion/Cu2O/SPE that displays good electrical conductivity at neutral pH values. It is found that the presence of ammonia causes complex formation with Cu(I), and this causes electroreduction of oxygen to result in an increased cathodic current. The finding was applied to the quantification of ammonium ions in the 1 to 1000 μM concentration range by amperometry at −0.45 V (vs. Ag/AgCl). This Faradaic phenomenon offers the advantage of direct voltammetric detection, one of the lowest known limits of detection (0.5 μM), and high sensitivity (250 mA∙M−1∙cm−2). It was applied to the determination of ammonium ion in human serum where it compared well with the photometric routine approach for clinical analysis using glutamate dehydrogenase. [Figure not available: see fulltext.]

  • 757. Zirkl, M
    et al.
    Sawatdee, A
    RISE, Swedish ICT, Acreo.
    Helbig, U
    Krause, M
    Scheipl, G
    Kraker, E
    Andersson Ersman, Peter
    RISE, Swedish ICT, Acreo.
    Nilsson, D
    Platt, D
    RISE, Swedish ICT, Acreo.
    Bodö, P
    Bauer, S
    Domann, G
    Stadlober, B
    An All-Printed Ferroelectric Active Matrix Sensor Network Based on Only Five Functional Materials Forming a Touchless Control Interface2011In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 23, p. 2069-74Article in journal (Refereed)
  • 758. Åisjöen, F
    et al.
    Schneiderman, JF
    Astalan, AP
    Kalabukhov, A
    Johansson, Christer
    RISE, Swedish ICT, Acreo.
    Winkler, D
    A new approach for bioassays based on frequency€“ time-domain measurements of magnetic nanoparticles2010In: Biosensors & bioelectronics, ISSN 0956-5663, E-ISSN 1873-4235, Vol. 25, p. 1008-13Article in journal (Refereed)
  • 759. Åisjöen, F
    et al.
    Schneiderman, JF
    Astalan, AP
    Kalabukhov, A
    Johansson, Christer
    RISE, Swedish ICT, Acreo.
    Winkler, D
    The need for stable, mono-dispersed, biofunctional magnetic nanoparticles for one-step immunoassays2010In: Journal of Physics, Vol. 200Article in journal (Refereed)
  • 760. Åisjöen, F
    et al.
    Schneiderman, JF
    Zaborowska, M
    Shunmugavel, K
    Magnelind, P
    Kalabukhov, A
    Petersson, K
    Prieto Astalan, A
    Johansson, Christer
    RISE, Swedish ICT, Acreo.
    Winkler, D
    Fast sensitive measurement of specific antigen-antibody binding reactions with magnetic nanoparticles HTS SQUID2009In: IEEE Transactions on Applied Superconductivity., Vol. 19, no 3, p. 848-52Article in journal (Refereed)
  • 761.
    Åklint, Thorbjörn
    et al.
    Chalmers University of Technology, Sweden.
    Johansson, Christer
    RISE, Swedish ICT, Acreo. Chalmers University of Technology, Sweden.
    Hanson, Maj
    Chalmers University of Technology, Sweden.
    Olsson, Eva
    Chalmers University of Technology, Sweden.
    Gustavsson, Fredrik
    Uppsala University, Sweden.
    Wäppling, Roger
    Uppsala University, Sweden.
    Rosen, Arne
    Chalmers University of Technology, Sweden.
    Magnetic Properties of deposited iron clusters produced in a high yield laser vaporization source1998In: Applied Organometallic Chemistry, Vol. 12, p. 479-Article in journal (Refereed)
    Abstract [en]

    Clusters of iron produced in a laser vaporization source have been characterized with time-of-flight spectra and deposited on different substrates for production of films of varying thickness. The magnetic properties of these films with thicknesses of 60 and 120 nm were investigated using an alternating gradient magnetometer. The films exhibit mono-domain behavior from a broad size distribution which has been confirmed by transmission electron microscopy. Films were also investigated by Mössbauer spectroscopy, which showed fast relaxation in the particles at room temperature.

  • 762. Åstlund, L
    et al.
    Wang, Q
    RISE, Swedish ICT, Acreo.
    Esteve, R
    Almqvist, S
    Rihtnesberg, D
    Reshanov, S
    Zhang, A Z
    Lim, Jang-Kwon
    RISE, Swedish ICT, Acreo.
    Bakowski, Mietek
    RISE, Swedish ICT, Acreo.
    Schöner, A
    Kaplan, W
    4H- 6H-SiC UV photodetectors2012In: Phys. Status Solid, Vol. c9, no 7, p. 1680-2Article in journal (Refereed)
  • 763.
    Öhlén, Peter
    et al.
    Ericsson Research, Sweden.
    Skubic, Björn
    Ericsson Research, Sweden.
    Rostami, Ahmad
    Ericsson Research, Sweden.
    Fiorani, Matteo
    RISE, Swedish ICT, Acreo, Broadband Technology. KTH Royal Institute of Technology, Sweden.
    Monti, Paolo
    RISE, Swedish ICT, Acreo, Broadband Technology. KTH Royal Institute of Technology, Sweden.
    Ghebretensaé, Zere
    Ericsson Research, Sweden.
    Mårtensson, Jonas
    RISE, Swedish ICT, Acreo.
    Wang, Kun
    RISE, Swedish ICT, Acreo.
    Wosinska, Lena
    RISE, Swedish ICT, Acreo, Broadband Technology. KTH Royal Institute of Technology, Sweden.
    Data Plane and Control Architectures for 5G Transport Networks2016In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 34, no 6, p. 1501-1508Article in journal (Refereed)
    Abstract [en]

    Next generation 5G mobile system will support the vision of connecting all devices that benefit from a connection, and support a wide range of services. Consequently, 5G transport networks need to provide the required capacity, latency, and flexibility in order to integrate the different technology domains of radio, transport, and cloud. This paper outlines the main challenges, which the 5G transport networks are facing and discusses in more detail data plane, control architectures, and the tradeoff between different network abstraction models.

  • 764.
    Öhman, F.
    et al.
    DTU Technical University of Denmark, Denmark.
    Tromborg, B.
    DTU Technical University of Denmark, Denmark.
    Mork, J.
    DTU Technical University of Denmark, Denmark.
    Aurelius, A.
    RISE, Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE, Swedish ICT, Acreo.
    Anders, Berntson
    RISE, Swedish ICT, Acreo.
    Measurements of non-linear noise re-distribution in an SOA2004In: Conference on Lasers and Electro-Optics, 2004. (CLEO)., 2004, Vol. 1Conference paper (Refereed)
    Abstract [en]

    Measurements of the noise statistics after a semiconductor optical amplifier (SOA) demonstrate non-linear noise re-distribution with a strong power and bandwidth dependence.

  • 765.
    Öhman, F.
    et al.
    DTU Technical University of Denmark, Denmark.
    Tromborg, B.
    DTU Technical University of Denmark, Denmark.
    Mørk, J.
    DTU Technical University of Denmark, Denmark.
    Aurelius, A.
    RISE, Swedish ICT, Acreo.
    Djupsjöbacka, Anders
    RISE, Swedish ICT, Acreo.
    Anders, Berntson
    RISE, Swedish ICT, Acreo.
    Measurements and simulations of nonlinear noise redistribution in an SOA2005In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 17, no 1, p. 16-18Article in journal (Refereed)
    Abstract [en]

    Measurements and numerical simulations of the noise statistics after a semiconductor optical amplifier (SOA) demonstrate nonlinear noise redistribution. The redistribution, which relies on self-modulation due to gain saturation and carrier dynamics, shows a strong power and bandwidth dependence and can be important for SOA-based regenerators. © 2005 IEEE.

  • 766. Österberg, FW
    et al.
    Dalslet, BT
    Snakenborg, D
    Johansson, Christer
    RISE, Swedish ICT, Acreo.
    Hansen, MF
    Chip-Based Measurements of Brownian Relaxation of Magnetic Beads Using a Planar Hall Effect Magnetic Field Sensor2010In: AIP Conference Proceedings, Vol. 1311, p. 176-182Article in journal (Refereed)
13141516 751 - 766 of 766
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