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4 results on '"Jan Hilhorst"'

1. Direct Evidence of Chlorine-Induced Preferential Crystalline Orientation in Methylammonium Lead Iodide Perovskites Grown on TiO2

Author

Dmitry Aldakov, Firoz Alam, Stéphanie Pouget, Jan Hilhorst, Tobias U. Schülli, Maria Méndez, Peter Reiss, David Djurado, Mathilde Bouchard, Synthèse, Structure et Propriétés de Matériaux Fonctionnels (STEP), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Service Général des Rayons X (SGX ), Modélisation et Exploration des Matériaux (MEM), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), and ANR-16-CE05-0019,PERSIL,Cellules solaires tandem Perovskite-Silicium nanocristallin(2016)

Subjects
Diffraction, Iodide, Halide, 02 engineering and technology, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, 010402 general chemistry, 7. Clean energy, 01 natural sciences, law.invention, law, Solar cell, Microscopy, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, chemistry.chemical_classification, Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Synchrotron, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Crystallography, General Energy, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Nanometre, Charge carrier, 0210 nano-technology, [CHIM.OTHE]Chemical Sciences/Other
Abstract

Mixed halide hybrid perovskites CH3NH3PbI3–xClx (MAPICl) show higher charge carrier diffusion lengths, improved solar cell characteristics, and enhanced stability as compared to their single halide counterparts CH3NH3PbI3 (MAPI). This is surprising in view of the fact that the actually observed Cl content is very low (x < 0.1) as the incorporation of large amounts of Cl in the MAPI lattice is crystallographically not possible. Understanding the role of chlorine in these systems is therefore of the utmost importance and has been the subject of several experimental and theoretical studies. The main conclusions are that Cl addition leads to larger grain sizes and preferential crystalline orientation; however, so far a more quantitative description of these aspects is lacking. Synchrotron X-ray diffraction microscopy is a very promising technique in this respect, as it allows for the direct imaging of crystalline domains oriented in a selected direction with a resolution of some hundreds of nanometers. When i...

Published
2017
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2. Lattice Tilt Mapping using Full Field Diffraction X-Ray Microscopy at ID01 ESRF

Author

Olivier Balmes, Tao Zhou, Jonas Ohlsson, Lars Samuelson, Zhe Ren, Jan Hilhorst, Tobias U. Schülli, Tomaš Stankevič, Andrea Troian, Anders Mikkelsen, and Zhaoxia Bi

Subjects
Diffraction, Materials science, Condensed matter physics, X-ray, 02 engineering and technology, Full field, 021001 nanoscience & nanotechnology, 01 natural sciences, 010309 optics, Lattice (order), 0103 physical sciences, Microscopy, 0210 nano-technology, Instrumentation
Published
2018
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3. X-Ray Optics on a Chip: Guiding X Rays in Curved Channels

Author

S. Hoffmann, Johann Haber, Tim Salditt, M. Vassholz, Markus Osterhoff, and Jan Hilhorst

Subjects
Physics, Total internal reflection, Optical fiber, business.industry, General Physics and Astronomy, X-ray optics, 02 engineering and technology, Radiation, 021001 nanoscience & nanotechnology, Cladding (fiber optics), Chip, Curvature, 01 natural sciences, law.invention, Optics, law, 0103 physical sciences, 010306 general physics, 0210 nano-technology, Extreme value theory, business
Abstract

We study the propagation of hard x rays in single curved x-ray waveguide channels and observe waveguide effects down to surprisingly small radii of curvature R≃10 mm and a large contour length s≃5 mm, deflecting beams up to 30°. At these high angles, about 2 orders of magnitude above the critical angle of total reflection θ(c), most radiation modes are lost by "leaking" into the cladding, while certain "survivor" modes persist. This may open up a new form of integrated x-ray optics "on a chip," requiring curvatures mostly well below the extreme values studied here, e.g., to split and to delay x-ray pulses.

Published
2015
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4. Paramagnetic lipid-coated silica nanoparticles with a fluorescent quantum dot core: a new contrast agent platform for multimodality imaging

Author

Matti M. van Schooneveld, Klaas Nicolay, Zahi A. Fayad, Karolien Castermans, Celso de Mello Donegá, David P. Cormode, Rolf Koole, Jan Hilhorst, Andries Meijerink, Gustav J. Strijkers, Daniel Vanmaekelbergh, Willem J. M. Mulder, A.W. Griffioen, Chemie van de vaste stof: Luminescentie en elektrochemie, Colloïden en grenslagen, Dep Scheikunde, Other departments, and Medical Biochemistry

Subjects
Gadolinium DTPA, Biocompatibility, Surface Properties, Silicon dioxide, Biomedical Engineering, Contrast Media, Pharmaceutical Science, Bioengineering, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Article, Fluorescence, Cell Line, Polyethylene Glycols, Magnetics, chemistry.chemical_compound, Paramagnetism, Quantum Dots, Monolayer, Fluorescence microscope, Animals, Humans, Pharmacology, Chemistry, Organic Chemistry, Silicon Dioxide, 021001 nanoscience & nanotechnology, Lipids, Magnetic Resonance Imaging, 0104 chemical sciences, Quantum dot, Surface modification, Cattle, 0210 nano-technology, Hydrophobic and Hydrophilic Interactions, Biotechnology
Abstract

Silica particles as a nanoparticulate carrier material for contrast agents have received considerable attention the past few years, since the material holds great promise for biomedical applications. A key feature for successful application of this material in vivo is biocompatibility, which may be significantly improved by appropriate surface modification. In this study, we report a novel strategy to coat silica particles with a dense monolayer of paramagnetic and PEGylated lipids. The silica nanoparticles carry a quantum dot in their center and are made target-specific by the conjugation of multiple alphavbeta3-integrin-specific RGD-peptides. We demonstrate their specific uptake by endothelial cells in vitro using fluorescence microscopy, quantitative fluorescence imaging, and magnetic resonance imaging. The lipid-coated silica particles introduced here represent a new platform for nanoparticulate multimodality contrast agents.

Published
2008

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