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  1. Article ; Online: m

    Gao, Lili / Li, Xiaotong / Traoré, Boubacar / Zhang, Yalan / Fang, Junjie / Han, Yu / Even, Jacky / Katan, Claudine / Zhao, Kui / Liu, Shengzhong / Kanatzidis, Mercouri G

    Journal of the American Chemical Society

    2021  Volume 143, Issue 31, Page(s) 12063–12073

    Abstract: Two-dimensional (2D) halide perovskites have several distinct structural classes and exhibit great tunability, stability, and high potential for photovoltaic applications. Here, we report a new series of hybrid 2D perovskites in the Dion-Jacobson (DJ) ... ...

    Abstract Two-dimensional (2D) halide perovskites have several distinct structural classes and exhibit great tunability, stability, and high potential for photovoltaic applications. Here, we report a new series of hybrid 2D perovskites in the Dion-Jacobson (DJ) class based on aromatic
    Language English
    Publishing date 2021-08-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.1c03687
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  2. Article: m-Phenylenediammonium as a New Spacer for Dion–Jacobson Two-Dimensional Perovskites

    Gao, Lili / Li, Xiaotong / Traoré, Boubacar / Zhang, Yalan / Fang, Junjie / Han, Yu / Even, Jacky / Katan, Claudine / Zhao, Kui / Liu, Shengzhong / Kanatzidis, Mercouri G.

    Journal of the American Chemical Society. 2021 Aug. 03, v. 143, no. 31

    2021  

    Abstract: ... of hybrid 2D perovskites in the Dion–Jacobson (DJ) class based on aromatic m-phenylenediammonium (mPDA ...

    Abstract Two-dimensional (2D) halide perovskites have several distinct structural classes and exhibit great tunability, stability, and high potential for photovoltaic applications. Here, we report a new series of hybrid 2D perovskites in the Dion–Jacobson (DJ) class based on aromatic m-phenylenediammonium (mPDA) dications. The crystal structures of the DJ perovskite materials (mPDA)MAₙ–₁PbₙI₃ₙ₊₁ (n = 1–3) were solved and refined using single-crystal X-ray crystallography. The results indicate a short I···I interlayer distance of 4.00–4.04 Å for the (mPDA)MAₙ–₁PbₙI₃ₙ₊₁ (n = 2 and 3) structures, which is the shortest among DJ perovskites. However, Pb–I–Pb angles are as small as 158–160°, reflecting the large distortion of the inorganic framework, which results in larger band gaps for these materials than those in other DJ analogues. Density functional theory calculations suggest appreciable dispersion in the stacking direction, unlike the band structures of the Ruddlesden–Popper phases, which exhibit flat bands along the stacking direction. This is a consequence of the short interlayer I···I distances that can lead to interlayer electronic coupling across the layers. The solution-deposited films (nominal (mPDA)MAₙ–₁PbₙI₃ₙ₊₁ compositions of n = 1–6) reveal improved surface coverage with increasing nominal n value with the higher n films being composed of a mixture of n = 1 and bulk three-dimensional MAPbI₃ perovskites. The films made from solutions of these materials behave differently from those of other 2D iodide perovskites, and their solar cells have a mixture of n = 1 DJ and MAPbI₃ as light-absorbing semiconductors.
    Keywords X-ray diffraction ; density functional theory ; iodides
    Language English
    Dates of publication 2021-0803
    Size p. 12063-12073.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.1c03687
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  3. Article: Two-Dimensional Halide Perovskites Incorporating Straight Chain Symmetric Diammonium Ions, (NH₃CₘH₂ₘNH₃)(CH₃NH₃)ₙ₋₁PbₙI₃ₙ₊₁ (m = 4–9; n = 1–4)

    Li, Xiaotong / Justin Hoffman / Weijun Ke / Michelle Chen / Hsinhan Tsai / Wanyi Nie / Aditya D. Mohite / Mikaël Kepenekian / Claudine Katan / Jacky Even / Michael R. Wasielewski / Constantinos C. Stoumpos / Mercouri G. Kanatzidis

    Journal of the American Chemical Society. 2018 Aug. 31, v. 140, no. 38

    2018  

    Abstract: ... stability. Herein, we present the new homologous 2D series (NH₃CₘH₂ₘNH₃)(CH₃NH₃)ₙ₋₁PbₙI₃ₙ₊₁ (m = 4–9; n = 1 ... 4), where m represents the carbon-chain number and n equals layer-thickness number. Multilayer (n ... grinding method for m = 4 and 6 and by the solution method for m = 7–9. Structural characterization ...

    Abstract Low-dimensional halide perovskites have recently attracted intense interest as alternatives to the three-dimensional (3D) perovskites because of their greater tunability and higher environmental stability. Herein, we present the new homologous 2D series (NH₃CₘH₂ₘNH₃)(CH₃NH₃)ₙ₋₁PbₙI₃ₙ₊₁ (m = 4–9; n = 1–4), where m represents the carbon-chain number and n equals layer-thickness number. Multilayer (n > 1) 2D perovskites incorporating diammonium cations were successfully synthesized by the solid-state grinding method for m = 4 and 6 and by the solution method for m = 7–9. Structural characterization by single-crystal X-ray diffraction for the m = 8 and m = 9 series (n = 1–4) reveals that these compounds adopt the Cc space group for even n members and Pc for odd n members. The optical bandgaps are 2.15 eV for two-layer (n = 2), 2.01 eV for three-layer (n = 3), and 1.90 eV for four-layer (n = 4). The materials exhibit excellent solution processability, and casting thin-films of the n = 3 members was successfully accomplished. The films show a clear tendency for the higher-m members to have preferred orientation on the glass substrate, with m = 8 exhibiting almost perfect vertical layer orientation and m = 9 displaying both vertical and parallel layer orientation, as confirmed by grazing-incidence wide-angle X-ray scattering (GIWAXS) measurements. The vertical layer orientation for the (NH₃C₈H₁₆NH₃)(CH₃NH₃)₂Pb₃I₁₀ member results in the best thermal, light, and air stability within this series, thus showing excellent potential for solar cell applications.
    Keywords X-ray diffraction ; air ; cations ; glass ; grinding ; solar cells ; synthesis ; wide-angle X-ray scattering
    Language English
    Dates of publication 2018-0831
    Size p. 12226-12238.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.8b07712
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  4. Article ; Online: Waar zijn de bewijzen dat het mediterrane dieet werkt?

    Katan, Martijn

    Nederlands tijdschrift voor geneeskunde

    2022  Volume 166

    Abstract: A recent Cochrane review stated that 'There is a paucity of evidence for secondary prevention' of cardiovascular disease (CVD) by a Mediterranean-style diet. The CORDIOPREV trial attempted to fill this gap. Subjects in the Mediterranean-diet group ... ...

    Title translation How strong is the evidence that a Mediterranean diet will prevent cardiovascular disease?
    Abstract A recent Cochrane review stated that 'There is a paucity of evidence for secondary prevention' of cardiovascular disease (CVD) by a Mediterranean-style diet. The CORDIOPREV trial attempted to fill this gap. Subjects in the Mediterranean-diet group increased their intake of olive oil by 24 g per day and also ate a bit more fruit, vegetables and nuts than a high-carbohydrate control group. Incidence of CVD fell by 25% in 7 y. Known causes of CVD such as blood pressure, LDL cholesterol and overweight were not affected. Thus one has to assume that small amounts of fruits, vegetables, nuts and olive oil cause a major reduction in CVD through hitherto unknown pathways. This requires a leap of faith that the current author is reluctant to take.
    MeSH term(s) Humans ; Cardiovascular Diseases/epidemiology ; Olive Oil ; Diet, Mediterranean ; Fruit ; Nuts ; Vegetables ; Risk Factors
    Chemical Substances Olive Oil
    Language Dutch
    Publishing date 2022-12-22
    Publishing country Netherlands
    Document type English Abstract ; Journal Article
    ZDB-ID 82073-8
    ISSN 1876-8784 ; 0028-2162
    ISSN (online) 1876-8784
    ISSN 0028-2162
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  5. Article ; Online: Reply to H-M Cheng and K Sundram

    Katan, M.B. / Zock, P.L. / van de Bovenkamp, P.

    American Journal of Clinical Nutrition

    1999  Volume 70, Issue 1

    Keywords Life Science
    Language English
    Publishing country nl
    Document type Article ; Online
    ZDB-ID 280048-2
    ISSN 1938-3207 ; 0002-9165
    ISSN (online) 1938-3207
    ISSN 0002-9165
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  6. Article ; Online: Targeting G-CSF to treat autoinflammation.

    Bunney, Tom D / Katan, Matilda

    Nature immunology

    2023  Volume 24, Issue 5, Page(s) 736–737

    MeSH term(s) Granulocyte Colony-Stimulating Factor ; Inflammasomes
    Chemical Substances Granulocyte Colony-Stimulating Factor (143011-72-7) ; Inflammasomes
    Language English
    Publishing date 2023-03-30
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2016987-5
    ISSN 1529-2916 ; 1529-2908
    ISSN (online) 1529-2916
    ISSN 1529-2908
    DOI 10.1038/s41590-023-01474-5
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  7. Article ; Online: Het probleem met de voedingsepidemiologie.

    Katan, M B

    Nederlands tijdschrift voor geneeskunde

    2020  Volume 164

    Abstract: Observational studies have reported many beneficial effects of vitamin and mineral supplements on cardiovascular and other diseases, but randomized controlled trials have failed to confirm these. This could be due to the failure of statistical adjustment ...

    Title translation Confounding in nutritional epidemiology; is Mendelian randomization the answer?
    Abstract Observational studies have reported many beneficial effects of vitamin and mineral supplements on cardiovascular and other diseases, but randomized controlled trials have failed to confirm these. This could be due to the failure of statistical adjustment to eliminate residual and unmeasured confounding by known risk factors. A Mendelian randomization study now suggests a similar problem for the observed beneficial effects of moderate alcohol intake. When 500,000 Chinese people were ranked by self-reported alcohol intake, stroke risk showed a U-shaped curve, risk being lowest at 1-2 units per day. However, when subjects were ranked by genetically conditioned intake, risk was lowest in abstainers and went up linearly with intake. Mendelian randomization may be more suitable for elucidating the effects of diet on health than conventional epidemiology.
    MeSH term(s) Alcohol Drinking/genetics ; Diet ; Dietary Supplements ; Humans ; Mendelian Randomization Analysis ; Protective Factors ; Risk Factors ; Stroke/epidemiology
    Language Dutch
    Publishing date 2020-05-14
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 82073-8
    ISSN 1876-8784 ; 0028-2162
    ISSN (online) 1876-8784
    ISSN 0028-2162
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  9. Article ; Online: A Self-Calibrated Single Wavelength Biosensor for Measuring Oxygen Saturation.

    Katan, Michal / Pearl, Ori / Tzroya, Alon / Duadi, Hamootal / Fixler, Dror

    Biosensors

    2024  Volume 14, Issue 3

    Abstract: Traditional methods for measuring blood oxygen use multiple wavelengths, which produce an intrinsic error due to ratiometric measurements. These methods assume that the absorption changes with the wavelength, but in fact the scattering changes as well ... ...

    Abstract Traditional methods for measuring blood oxygen use multiple wavelengths, which produce an intrinsic error due to ratiometric measurements. These methods assume that the absorption changes with the wavelength, but in fact the scattering changes as well and cannot be neglected. We found that if one measures in a specific angle around a cylindrical tissue, called the iso-pathlength (IPL) point, the reemitted light intensity is unaffected by the tissue's scattering. Therefore, the absorption can be isolated from the scattering, which allows the extraction of the subject's oxygen saturation. In this work, we designed an optical biosensor for reading the light intensity reemitted from the tissue, using a single light source and multiple photodetectors (PDs), with one of them in the IPL point's location. Using this bio-device, we developed a methodology to extract the arterial oxygen saturation using a single wavelength light source. We proved this method is not dependent on the light source and is applicable to different measurement locations on the body, with an error of 0.5%. Moreover, we tested thirty-eight males and females with the biosensor under normal conditions. Finally, we show the results of measuring subjects in a hypoxic chamber that simulates extreme conditions with low oxygen.
    MeSH term(s) Male ; Female ; Humans ; Oxygen Saturation ; Oxygen ; Oximetry/methods ; Light ; Biosensing Techniques
    Chemical Substances Oxygen (S88TT14065)
    Language English
    Publishing date 2024-03-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662125-3
    ISSN 2079-6374 ; 2079-6374
    ISSN (online) 2079-6374
    ISSN 2079-6374
    DOI 10.3390/bios14030132
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  10. Article ; Online: How to Keep Your (Stroke) Trial Alive?

    Arnold, Markus / Kaesmacher, Johannes / Katan, Mira

    Stroke

    2023  Volume 54, Issue 4, Page(s) e167–e170

    MeSH term(s) Humans ; Stroke/therapy ; Patient Selection ; Informed Consent
    Language English
    Publishing date 2023-03-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80381-9
    ISSN 1524-4628 ; 0039-2499 ; 0749-7954
    ISSN (online) 1524-4628
    ISSN 0039-2499 ; 0749-7954
    DOI 10.1161/STROKEAHA.122.037784
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