Results 21 to 30 of about 5,433 (258)
High-resolution x-ray telescopes [PDF]
SPIE Proceedings, 2010 High-energy astrophysics is a relatively young scientific field, made possible by space-borne telescopes. During the half-century history of x-ray astronomy, the sensitivity of focusing x-ray telescopes-through finer angular resolution and increased effective area-has improved by a factor of a 100 million.
O'Dell, S. L. +23 more
openaire +2 more sources
Mechanochemical Synthesis of X‐Vinylbenziodoxol(on)es and One‐Pot Conversion to Complex Alkenes**
Angewandte Chemie, EarlyView.The synthesis of a wide range of complex 1,2‐di(heteroatom)‐substituted (Z)‐alkenes is achieved through a mechanochemical one‐pot reaction of ethynylbenziodoxol(on)es (EBX/EBO) with a variety of heteroatom nucleophiles. The mechanochemical activation enables synthesis of a range of novel vinylbenziodoxol(on)es (VBX/VBO) whose synthesis is inefficient ...
Sayad Doobary +3 more
wiley +2 more sources
Advanced Functional Materials, EarlyView.An advanced F‐doped and ─CN group co‐modified FCCN is developed. Due to the synergistic effects of co‐modification in promoting photogenerated exciton generation, enhancing charge kinetics, expanding active interfacial areas, and optimizing CO2 interfacial reactions, the FCCN photocatalyst demonstrates excellent catalytic performance and high ...
Sheng‐Qi Guo +9 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Ultrathin AlOxHy interlayers between aluminum films and polymer substrates significantly improve electro‐mechanical properties of flexible thin film systems. By precisely controlling interlayer thickness using atomic layer deposition, this study identifies an optimal interlayer thickness of 5–10 nm that enhances ductility and delays cracking.
Johanna Byloff +9 more
wiley +1 more source
Multiwavelength Observations of the Apparently Nonrepeating FRB 20250316A
The Astrophysical JournalThe physical origin of fast radio bursts (FRBs) remains uncertain. Although multiwavelength observations have been widely conducted, only Galactic FRB 20200428D is associated with an X-ray burst from the magnetar SGR J1935+2154.
Ye Li +74 more
doaj +1 more source
The Promise of Solid Lubricants for a Sustainable Future
Advanced Materials, EarlyView.Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher +7 more
wiley +1 more source
Soft X‐Ray Imaging of Dense and Fast Magnetosheath Jets: Numerical Simulations
Earth and Space ScienceThe goal of this paper is to estimate the soft X‐ray signature associated with dense and fast magnetosheath jets streaming toward the dayside magnetosphere. We developed a non‐self‐consistent kinematic approach for simulating numerically the transport of
G. Voitcu +3 more
doaj +1 more source
Optical design of diffraction-limited x-ray telescopes [PDF]
Applied Optics, 2020 Astronomical imaging with micro-arcsecond (µas) angular resolution could enable breakthrough scientific discoveries. Previously proposed µas x-ray imager designs have been interferometers with limited effective collecting area. Here we describe x-ray telescopes achieving diffraction-limited performance over a wide energy band with large effective area,
Brandon D. Chalifoux +3 more
openaire +3 more sources
Electrically Tunable Friction: From Sticky to Slippery with Ionic Hydrogels
Advanced Materials, EarlyView.This work demonstrates electrically tunable friction “from sticky to slippery” using ionic hydrogels, achieving reversible more‐than‐fifty‐fold modulation without liquid lubricants. An electric field extracts a salt‐rich interfacial layer that dramatically reduces friction.
Chenxu Liu +9 more
wiley +1 more source
Arcus x-ray telescope performance and alignment
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII, 2023 submitted to SPIE UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII (2023)
Günther, Hans Moritz +6 more
openaire +2 more sources