Results 71 to 80 of about 70,958 (245)

Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)

Advanced Functional Materials, EarlyView.
Luminescent MOF‐76 materials based on Eu(III) and mixed Eu(III)/Y(III) show rapid and reversible changes in emission intensity in response to O2 with very short response times. The effect is based on triplet quenching of the linker ligands that act as photosensitizers. Average emission lifetimes of a few milliseconds turn out to be mostly unaffected by
Zhenyu Zhao, Christian Weinberger, Jakob Steube, Matthias Bauer, Martin Brehm, Michael Tiemann   +5 more
wiley   +1 more source

Light-curve Structure and Hα Line Formation in the Tidal Disruption Event AT 2019azh

The Astrophysical Journal
AT 2019azh is a H+He tidal disruption event (TDE) with one of the most extensive ultraviolet and optical data sets available to date. We present our photometric and spectroscopic observations of this event starting several weeks before and out to ...
Sara Faris, Iair Arcavi, Lydia Makrygianni, Daichi Hiramatsu, Giacomo Terreran, Joseph Farah, D. Andrew Howell, Curtis McCully, Megan Newsome, Estefania Padilla Gonzalez, Craig Pellegrino, K. Azalee Bostroem, Wiam Abojanb, Marco C. Lam, Lina Tomasella, Thomas G. Brink, Alexei V. Filippenko, K. Decker French, Peter Clark, Or Graur, Giorgos Leloudas, Mariusz Gromadzki, Joseph P. Anderson, Matt Nicholl, Claudia P. Gutiérrez, Erkki Kankare, Cosimo Inserra, Lluís Galbany, Thomas Reynolds, Seppo Mattila, Teppo Heikkilä, Yanan Wang, Francesca Onori, Thomas Wevers, Eric R. Coughlin, Panos Charalampopoulos, Joel Johansson   +36 more
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

ULTRASAT: A Wide-field Time-domain UV Space Telescope

The Astrophysical Journal
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2027. It will carry a telescope with an unprecedentedly large field of view (204 deg ^2 ) and near-ultraviolet (NUV; 230–290 nm) sensitivity ...
Y. Shvartzvald, E. Waxman, A. Gal-Yam, E. O. Ofek, S. Ben-Ami, D. Berge, M. Kowalski, R. Bühler, S. Worm, J. E. Rhoads, I. Arcavi, D. Maoz, D. Polishook, N. Stone, B. Trakhtenbrot, M. Ackermann, O. Aharonson, O. Birnholtz, D. Chelouche, D. Guetta, N. Hallakoun, A. Horesh, D. Kushnir, T. Mazeh, J. Nordin, A. Ofir, S. Ohm, D. Parsons, A. Pe’er, H. B. Perets, V. Perdelwitz, D. Poznanski, I. Sadeh, I. Sagiv, S. Shahaf, M. Soumagnac, L. Tal-Or, J. Van Santen, B. Zackay, O. Guttman, P. Rekhi, A. Townsend, A. Weinstein, I. Wold   +43 more
doaj   +1 more source

Upflows in funnel-like legs of coronal magnetic loops

, 2009
The prominent blue shifts of Ne viii associated with the junctions of the magnetic network in the quiet Sun are still not well understood. By comparing the coronal magnetic-field structures as obtained by a potential-field reconstruction with the ...
Curdt, Werner, He, Jiansen, Marsch, Eckart, Tian, Hui   +3 more
core   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

The Optical to X-Ray Luminosity and Spectrum of Supernova Wind Breakouts

The Astrophysical Journal
Observations indicate that an optically thick circumstellar medium (CSM) at radii of 10 ^14 –10 ^15 cm around Type II core-collapse supernova (SN) progenitors is common (and may be present in other types of massive star explosions).
Tal Wasserman, Nir Sapir, Peter Szabo, Eli Waxman   +3 more
doaj   +1 more source

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

Advanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz, Jonas De Breuck, Sahar Salehi, Meike N. Leiske   +3 more
wiley   +1 more source

The Early Ultraviolet Light Curves of Type II Supernovae and the Radii of Their Progenitor Stars

The Astrophysical Journal
We present a sample of 34 normal Type II supernovae (SNe II) detected with the Zwicky Transient Facility, with multiband UV light curves starting at t ≤ 4 days after explosion, and X-ray observations.
Ido Irani, Jonathan Morag, Avishay Gal-Yam, Eli Waxman, Steve Schulze, Jesper Sollerman, K-Ryan Hinds, Daniel A. Perley, Ping Chen, Nora L. Strotjohann, Ofer Yaron, Erez A. Zimmerman, Rachel Bruch, Eran O. Ofek, Maayane T. Soumagnac, Yi Yang, Steven L. Groom, Frank J. Masci, Marie Aubert, Reed Riddle, Eric C. Bellm, David Hale   +21 more
doaj   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source