4 research outputs found

    Gegevensuitwisseling door toezichthouders

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    This research aims at defining the interests to be taken into account in the exchange of supervisory data among supervisors, and between supervisors on the one hand and the Ministry of Justice, the police and special investigating officers on the other. In addition, it examines the desirability and juridical possibility to insert a general regulation on data exchange in the General Administrative Law Act (Awb) and/or in other laws. In order to make an inventory of the interests involved in data exchange between the public agencies mentioned above, and to evaluate their respective importance, we examined the relevant literature and jurisprudence, executed a quickscan, studied specific cases, held discussions with experts in the field, organised a round table meeting with experts and, for the sake of a multicriteria analysis (MCA), conducted an internet inquiry among qualified people on the work floor

    Shape-Dependent Multiexciton Emission and Whispering Gallery Modes in Supraparticles of CdSe/Multishell Quantum Dots

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    Semiconductors are indispensable as the active light-emitting element in many optoelectronic devices. However, even the purest bulk semiconductors suffer from considerable nonradiative recombination leading to low photoluminescence efficiencies. Zero-dimensional quantum dots show a much better carrier-to-photon conversion caused by confinement of the excitons but suffer from nonradiative recombination when assembled into a solid, due to exciton energy transfer. Here, we report on the shape-dependent optical properties of self-assembled supraparticles composed of CdSe/multishell nanocrystals. All supraparticles show stable and bright photoluminescence in ambient up to high excitation intensities. When the supraparticles are deposited on a silicon surface their spherical shape is deformed due to drying. In addition to single-exciton emission, we observe bright emission from multiexciton states at high excitation powers. In contrast, supraparticles that retain their perfectly spherical shape show a spectrum with sharp Mie whispering gallery modes, while multiexciton emission is absent
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