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See detailHybrid plasmonic nanostructures based on controlled integration of MoS2 flakes on metallic nanoholes
Garoli, Denis; Mosconi, Dario; Miele, Ermanno et al

in Nanoscale (2018), 10(36), 17105-17111

Here, we propose an easy and robust strategy for the versatile preparation of hybrid plasmonic nanopores by means of controlled deposition of single flakes of MoS2 directly on top of metallic holes. The ... [more ▼]

Here, we propose an easy and robust strategy for the versatile preparation of hybrid plasmonic nanopores by means of controlled deposition of single flakes of MoS2 directly on top of metallic holes. The device is realized on silicon nitride membranes and can be further refined by TEM or FIB milling to achieve the passing of molecules or nanometric particles through a pore. Importantly, we show that the plasmonic enhancement provided by the nanohole is strongly accumulated in the 2D nanopore, thus representing an ideal system for single-molecule sensing and sequencing in a flow-through configuration. Here, we also demonstrate that the prepared 2D material can be decorated with metallic nanoparticles that can couple their resonance with the nanopore resonance to further enhance the electromagnetic field confinement at the nanoscale level. This method can be applied to any gold nanopore with a high level of reproducibility and parallelization; hence, it can pave the way to the next generation of solid-state nanopores with plasmonic functionalities. Moreover, the controlled/ordered integration of 2D materials on plasmonic nanostructures opens a pathway towards new investigation of the following: enhanced light emission; strong coupling from plasmonic hybrid structures; hot electron generation; and sensors in general based on 2D materials. [less ▲]

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See detailPlasmonic zero mode waveguide for highly confined and enhanced fluorescence emission
Ponzellini, Paolo; Zambrana-Puyalto, Xavier; Maccaferri, Nicolò UL et al

in Nanoscale (2018), 10(36), 17362-17369

We fabricate a plasmonic nanoslot that is capable of performing enhanced single molecule detection at 10 muM concentrations. The nanoslot combines the tiny detection volume of a zero-mode waveguide and ... [more ▼]

We fabricate a plasmonic nanoslot that is capable of performing enhanced single molecule detection at 10 muM concentrations. The nanoslot combines the tiny detection volume of a zero-mode waveguide and the field enhancement of a plasmonic nanohole. The nanoslot is fabricated on a bi-metallic film formed by the sequential deposition of gold and aluminum on a transparent substrate. Simulations of the structure yield an average near-field intensity enhancement of two orders of magnitude at its resonant frequency. Experimentally, we measure the fluorescence stemming from the nanoslot and compare it with that of a standard aluminum zero-mode waveguide. We also compare the detection volume for both structures. We observe that while both structures have a similar detection volume, the nanoslot yields a 25-fold fluorescence enhancement. [less ▲]

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See detailHybrid Ni/SiO2/Au dimer arrays for high-resolution refractive index sensing
Pourjamal, Sara; Kataja, Mikko; Maccaferri, Nicolò UL et al

in Nanophotonics (2018), 7(5), 905-912

We introduce a novel magnetoplasmonic sensor concept for sensitive detection of refractive index changes. The sensor consists of a periodic array of Ni/SiO2/Au direr nanodisks. Combined effects of near ... [more ▼]

We introduce a novel magnetoplasmonic sensor concept for sensitive detection of refractive index changes. The sensor consists of a periodic array of Ni/SiO2/Au direr nanodisks. Combined effects of near-field interactions between the Ni and Au disks within the individual dimers and far-field diffractive coupling between the dimers of the array produce narrow linewidth features in the magneto-optical Faraday spectrum. We associate these features with the excitation of surface lattice resonances and show that they exhibit a spectral shift when the refractive index of the surrounding environment is varied. Because the resonances are sharp, refractive index changes are accurately detected by tracking the wavelength where the Faraday signal crosses 0. Compared to random distributions of pure Ni nanodisks or Ni/SiO2/Au dimers or periodic arrays of Ni nanodisks, the sensing figure of merit of the hybrid magnetoplasmonic array is more than one order of magnitude larger. [less ▲]

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See detailHelical light emission from plasmonic vortices via magnetic tapered tip
Maccaferri, Nicolò UL; Gorodetski, Yuri; Garoli, Denis

in Journal of Physics. Conference Series (2018), 961

We investigate an architecture where a plasmonic vortex excited in a gold surface propagates on an adiabatically tapered magnetic tip and detaches to the far-field while carrying a well-defined optical ... [more ▼]

We investigate an architecture where a plasmonic vortex excited in a gold surface propagates on an adiabatically tapered magnetic tip and detaches to the far-field while carrying a well-defined optical angular momentum. We analyze the out-coming light and show that, despite generally high losses of flat magnetic surface, our 3D structure exhibits high energy throughput. Moreover, we show that once a magneto-optical activity is activated inside the magnetic tip a modulation of the total power transmittance is possible. [less ▲]

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See detailMagnetic Control of the Chiroptical Plasmonic Surfaces
Zubritskaya, Irina; Maccaferri, Nicolò UL; Inchausti Ezeiza, Xabier et al

in Nano Letters (2018), 18(1), 302-307

A major challenge facing plasmon nanophotonics is the poor dynamic tunability. A functional nanophotonic element would feature the real-time sizable tunability of transmission, reflection of light's ... [more ▼]

A major challenge facing plasmon nanophotonics is the poor dynamic tunability. A functional nanophotonic element would feature the real-time sizable tunability of transmission, reflection of light's intensity or polarization over a broad range of wavelengths, and would be robust and easy to integrate. Several approaches have been explored so far including mechanical deformation, thermal, or refractive index effects, and all-optical switching. Here we devise an ultrathin chiroptical surface, built on two-dimensional nanoantennas, where the chiral light transmission is controlled by the externally applied magnetic field. The magnetic field-induced modulation of the far-field chiroptical response with this surface exceeds 100% in the visible and near-infrared spectral ranges, opening the route for nanometer-thin magnetoplasmonic light-modulating surfaces tuned in real time and featuring a broad spectral response. [less ▲]

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See detailDescripción del comercio internacional utilizando un modelo de redes complejas
Kozlowski, Diego UL

in Conferencia Latinoamericana sobre Uso de R en Investigación + Desarrollo (LatinR 2018)-JAIIO 47 (CABA, 2018) (2018)

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See detailIntroduction
Hertweck, Florian UL

in Hertweck, Florian (Ed.) Positions on Emancipation. Architecture between Aesthetics and Politics (2018)

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See detailDynamische Mathematik und computergestützte Tests: GeoGebra in TAO
Kreis, Yves UL; Dording, Carole; Keller, Ulrich UL et al

in Ladel, Silke; Knopf, Julia; Weinberger, Armin (Eds.) Digitalisierung und Bildung (2018)

In diesem Beitrag stellen wir die Integration der Dynamischen-Mathematik-Software GeoGebra in die technologiebasierte Assessment-Plattform TAO vor. Diese Kombination von Anwendungen schafft neue Lern- und ... [more ▼]

In diesem Beitrag stellen wir die Integration der Dynamischen-Mathematik-Software GeoGebra in die technologiebasierte Assessment-Plattform TAO vor. Diese Kombination von Anwendungen schafft neue Lern- und Beurteilungsmöglichkeiten in einem modernen Unterricht: die Lernerfolge im Geometrieunterricht werden, im Vergleich zu einem klassischen Unterricht, gefördert und eventuelle Hindernisse beim Kompetenzerwerb können präzise identifiziert werden. Außerdem wird die Studie im Rahmen des Forschungsprojektes GeoGebraPrim beschrieben, wobei die Versuchsgruppe der 9-jährigen Kinder während ihres Lernprozesses Zugang zur Technologie haben, um mathematische Eigenschaften anhand von dynamischer Geometrie zu entdecken. Im Pre-Test unterscheiden sich die Versuchs- und Kontrollgruppe kaum. Die Versuchsgruppe erlangt allerdings signifikant bessere Resultate in den beiden Post-Tests sowie erstklassige Resultate in dem TBA-Test. [less ▲]

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See detailEnvironmental and sustainability education in the Benelux countries: Research, policy and practices at the intersection of education and societal transformation
Van Poeck, Katrien; König, Ariane UL; Wals, Arjen E.J.

in Environmental Education Research (2018), 24(Special Issue9-10), 1234-1250

As an introductory article of a Special Issue on Environmental and Sustainability Education (ESE) in the Benelux region, this paper provides an overview of ESE research, policy and practice in Belgium ... [more ▼]

As an introductory article of a Special Issue on Environmental and Sustainability Education (ESE) in the Benelux region, this paper provides an overview of ESE research, policy and practice in Belgium, The Netherlands and Luxembourg. It discusses the different contributions in this collection with regard to how the central theme of this issue, the relation between education and societal transformation, is approached in each paper. The main characteristics of the ESE research fields in the Benelux are described in general terms, and placed within the context of how ESE policy and practice are organised in these countries. Next, different conceptualisations of the relation between educational and political spaces reflected in the collection are discussed and the varied contributions to this issue are positioned in relation to three distinguished traditions of approaching the place of democracy in ESE. The authors conclude with commenting on how this relates to different approaches to the research-policy-practice interface. [less ▲]

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See detailSchulbuchentwicklung in Luxemburg: Forschungsergebnisse der TAPSE-Studie
Andersen, Katja Natalie UL

in Luxembourg Centre for Educational Testing (LUCET), Universität Luxemburg; Service de Coordination de la Recherche et de l’Innovation pédagogiques et technologiques (SCRIPT) (Eds.) Nationaler Bildungsbericht Luxemburg 2018 (2018)

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See detailEnabling the Continous Analysis of Security Vulnerabilities with VulData7
Jimenez, Matthieu UL; Le Traon, Yves UL; Papadakis, Mike UL

in IEEE International Working Conference on Source Code Analysis and Manipulation (2018)

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See detailBehavioural outcomes of subthalamic stimulation and medical therapy versus medical therapy alone for Parkinson's disease with early motor complications (EARLYSTIM trial): secondary analysis of an open-label randomised trial.
Lhommee, Eugenie; Wojtecki, Lars; Czernecki, Virginie et al

in The Lancet. Neurology (2018), 17(3), 223-231

BACKGROUND: Although subthalamic stimulation is a recognised treatment for motor complications in Parkinson's disease, reports on behavioural outcomes are controversial, which represents a major challenge ... [more ▼]

BACKGROUND: Although subthalamic stimulation is a recognised treatment for motor complications in Parkinson's disease, reports on behavioural outcomes are controversial, which represents a major challenge when counselling candidates for subthalamic stimulation. We aimed to assess changes in behaviour in patients with Parkinson's disease receiving combined treatment with subthalamic stimulation and medical therapy over a 2-year follow-up period as compared with the behavioural evolution under medical therapy alone. METHODS: We did a parallel, open-label study (EARLYSTIM) at 17 surgical centres in France (n=8) and Germany (n=9). We recruited patients with Parkinson's disease who were disabled by early motor complications. Participants were randomly allocated (1:1) to either medical therapy alone or bilateral subthalamic stimulation plus medical therapy. The primary outcome was mean change in quality of life from baseline to 2 years. A secondary analysis was also done to assess behavioural outcomes. We used the Ardouin Scale of Behavior in Parkinson's Disease to assess changes in behaviour between baseline and 2-year follow-up. Apathy was also measured using the Starkstein Apathy Scale, and depression was assessed with the Beck Depression Inventory. The secondary analysis was done in all patients recruited. We used a generalised estimating equations (GEE) regression model for individual items and mixed model regression for subscores of the Ardouin scale and the apathy and depression scales. This trial is registered with ClinicalTrials.gov, number NCT00354133. The primary analysis has been reported elsewhere; this report presents the secondary analysis only. FINDINGS: Between July, 2006, and November, 2009, 251 participants were recruited, of whom 127 were allocated medical therapy alone and 124 were assigned bilateral subthalamic stimulation plus medical therapy. At 2-year follow-up, the levodopa-equivalent dose was reduced by 39% (-363.3 mg/day [SE 41.8]) in individuals allocated bilateral subthalamic stimulation plus medical therapy and was increased by 21% (245.8 mg/day [40.4]) in those assigned medical therapy alone (p<0.0001). Neuropsychiatric fluctuations decreased with bilateral subthalamic stimulation plus medical therapy during 2-year follow-up (mean change -0.65 points [SE 0.15]) and did not change with medical therapy alone (-0.02 points [0.15]); the between-group difference in change from baseline was significant (p=0.0028). At 2 years, the Ardouin scale subscore for hyperdopaminergic behavioural disorders had decreased with bilateral subthalamic stimulation plus medical therapy (mean change -1.26 points [SE 0.35]) and had increased with medical therapy alone (1.12 points [0.35]); the between-group difference was significant (p<0.0001). Mean change from baseline at 2 years in the Ardouin scale subscore for hypodopaminergic behavioural disorders, the Starkstein Apathy Scale score, and the Beck Depression Inventory score did not differ between treatment groups. Antidepressants were stopped in 12 patients assigned bilateral subthalamic stimulation plus medical therapy versus four patients allocated medical therapy alone. Neuroleptics were started in nine patients assigned medical therapy alone versus one patient allocated bilateral subthalamic stimulation plus medical therapy. During the 2-year follow-up, two individuals assigned bilateral subthalamic stimulation plus medical therapy and one patient allocated medical therapy alone died by suicide. INTERPRETATION: In a large cohort with Parkinson's disease and early motor complications, better overall behavioural outcomes were noted with bilateral subthalamic stimulation plus medical therapy compared with medical therapy alone. The presence of hyperdopaminergic behaviours and neuropsychiatric fluctuations can be judged additional arguments in favour of subthalamic stimulation if surgery is considered for disabling motor complications. FUNDING: German Federal Ministry of Education and Research, French Programme Hospitalier de Recherche Clinique National, and Medtronic. [less ▲]

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