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Chalmers Publication Library
Institutional Repository
270 Publications
OpenAIRE 2.0 (EC funding)
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  • Nanochannel diodes based on InAs/Al80Ga20Sb heterostructures: Fabrication and zero-bias detector properties

    Westlund, Andreas; Nilsson, Per-Åke; Sangaré, P.; Ducournau, G.; Gaquière, C.; Desplanque, L.; Wallart, X.; Grahn, Jan (2015)
    Projects: EC | ROOTHZ (243845)
    The authors present a novel process for fabrication of deep submicron isolation patterns in InAs/Al80Ga20Sb heterostructures. The process is demonstrated by processing InAs/Al80Ga20Sb self-switching diodes (SSDs). SSDs require high-resolution isolation patterns, which presents a major fabrication challenge because of the oxidation sensitivity of Al(Ga)Sb alloys. The presented fabrication process completely avoided exposure of Al(Ga)Sb to air and resulted in an isolation pattern with a feature...

    Wideband and High-Gain Corporate-Fed Gap Waveguide Slot Array Antenna With ETSI Class II Radiation Pattern in V-Band

    Vosoogh, Abbas; Kildal, Per-Simon; Vassilev, Vessen (2017)
    Projects: EC | GAPWAVE ICS (321125)
    We present a V-band multilayer corporate-fed slot array antenna with wide impedance bandwidth and high efficiency. The proposed antenna consists of three unconnected metal layers based on the recently introduced gap waveguide technology. A 2 x 2 cavity-backed slot subarray acts as the unit cell of the array. The top metal layer contains the radiating slots, the intermediate layer contains the cavities, formed by pins, and the third layer is the ridge gap waveguide corporate-feed network. The ...

    Influence of 0001 tilt grain boundaries on the destruction of the quantum Hall effect in graphene

    Bergvall, Anders; Carlsson, J. M.; Löfwander, Tomas (2015)
    Projects: EC | CONCEPTGRAPHENE (257829)
    The half-integer quantum Hall effect (QHE) is often suppressed in graphene grown by chemical vapor deposition on metals. The reason behind the suppression is unclear, and we hypothesize that it might be connected to extended defects in the material. In this paper we present results for the quantum Hall effect in graphene with [0001] tilt grain boundaries connecting opposite sides of Hall bar devices. Such grain boundaries contain 5-7 ring complexes that host defect states that hybridize to fo...

    Including pathogen risk in life cycle assessment: the effect of modelling choices in the context of sewage sludge management

    Harder, Robin; Peters, Gregory; Molander, Sverker; Ashbolt, Nicholas J.; Svanström, Magdalena (2016)
    Projects: EC | ROUTES (265156)
    Purpose: Recent attempts to include adverse effects of pathogens on human health in life cycle assessment (LCA) have focused on integrating results obtained through quantitative microbial risk assessment (QMRA) as an impact category in LCA. This study aimed to investigate whether the use of QMRA can be an adequate way of integrating pathogen impact potential in LCA and to quantify how pathogen impact potential is affected by choices regarding model structure and mathematical relationships use...

    Combined Oxides of Iron, Manganese and Silica as Oxygen Carriers for Chemical-Looping Combustion

    Källen, Malin; Hallberg, Peter; Rydén, Magnus; Mattisson, Tobias; Lyngfelt, Anders (2014)
    Projects: EC | INNOCUOUS (241401)
    Spray-dried particles with the chemical compositions of Fe0.66Mn1.33SiO3 and FeMnSiO3 have been examined as oxygen carrier materials for chemical-looping combustion. The performance of the materials was examined in oxygen release experiments and during fuel operation with natural gas and syngas. The experiments were carried out in a fluidized-bed chemical-looping reactor system designed for a thermal power of 300 W. The reactor system includes an air reactor and a fuel reactor, as well as loo...
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