Results 61 to 70 of about 209,601 (301)

On the Nature of Soft X-ray Weak Quasi-Stellar Objects [PDF]

, 1999
Recent studies of QSOs with ROSAT suggest the existence of a significant population of Soft X-ray Weak QSOs (SXW QSOs) where the soft X-ray flux is ~ 10-30 times smaller than in typical QSOs.
A. Laor, Beverley J. Wills, Boller Th., Boller Th., Brinkmann W., Brosch N., Clavel J., Hartigan J. A., Hes R., Lawrence A., Miller P., Rachen J. P., Serego Alighieri S., Ulrich M.-H., W. N. Brandt, Wills B. J., Yuan W.   +16 more
core   +3 more sources

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

Advanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho, M. Naeem, T. H. C. Costa, M. S. Libório, J. C. A. Queiroz, C. B. B. Luna, R. R. M. Sousa, P. S. Vieira, E. M. Araújo   +8 more
wiley   +1 more source

Vacuum ultraviolet spectroscopy of the lowest-lying electronic state in subcritical and supercritical water

Nature Communications, 2017
The link between hydrogen bonding and the optical properties of water has been debated for many years, but not fully understood. Here, the authors report vacuum ultraviolet absorption spectra for subcritical and supercritical water, providing insight ...
Timothy W. Marin, Ireneusz Janik, David M. Bartels, Daniel M. Chipman   +3 more
doaj   +1 more source

Vacuum ultraviolet photoabsorption of prime ice analogues of Pluto and Charon [PDF]

, 2018
Here we present the first Vacuum UltraViolet (VUV) photoabsorption spectra of ice analogues of Pluto and Charon ice mixtures. For Pluto the ice analogue is an icy mixture containing nitrogen (N2), carbon monoxide (CO), methane (CH4) and water (H2O ...
Cheng, B-M, Lo, J-I, Mason, Nigel J, Pavithraa, S, Rahul, K, Raja Sekhar, B N, Sivaraman, B   +6 more
core   +1 more source

In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, EarlyView.
In this work, a magnetic core‐shell catalyst (HOF‐on‐Fe3O4/ZIF‐67) is successfully synthesized, consisting of a metal–organic framework (ZIF‐67) with magnetic Fe3O4 as the core and a porous hydrogen‐bonded organic framework (HOF) as the shell. The catalyst efficiently activated peroxymonosulfate, resulting in rapid and effective removal of water ...
Yingying Du, Chenhui Ding, Chao Deng, Susanta Banerjee, Seema Agarwal   +4 more
wiley   +1 more source

Multiwavelength Sun-as-a-star Analysis of the M8.7 Flare on 2022 October 2 Using Hα and EUV Spectra Taken by SMART/SDDI and SDO/EVE

The Astrophysical Journal
This paper presents a multiwavelength Sun-as-a-star analysis of the M8.7 flare on 2022 October 2, which was associated with a filament eruption and the subsequent coronal mass ejection.
Takato Otsu, Ayumi Asai
doaj   +1 more source

Rapid Correction of Turbidity Interference on Chemical Oxygen Demand Measurements by Using Ultraviolet-Visible Spectrometry

Chemosensors
We developed a simple, rapid, and high-precision method to compensate for the turbidity interference in the measurement of water parameters using ultraviolet-visible spectrometry. By combining direct orthogonal signal correction (DOSC) with partial least
Shihan Shan, Yihuan Ji, Hanjing Deng, Zhuohui Wu, Tinglong Yang, Xiaoping Wang   +5 more
doaj   +1 more source

Probing autoionizing states of molecular oxygen with XUV transient absorption: Electronic symmetry dependent lineshapes and laser induced modification

, 2017
The dynamics of autoionizing Rydberg states of oxygen are studied using attosecond transient absorption technique, where extreme ultraviolet (XUV) initiates molecular polarization and near infrared (NIR) pulse perturbs its evolution. Transient absorption
Haxton, Daniel J., Li, Xuan, Liao, Chen-Ting, Lucchese, Robert R., McCurdy, C. William, Rescigno, Thomas N., Sandhu, Arvinder   +6 more
core   +3 more sources

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

Advanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer, Mareen Stahlberger, Xiaojing Liu, Yi Luo, Niklas E. Häußermann, Puja Singhvi, Yidong Liu, Olaf Fuhr, Martin Nieger, Lars Heinke, Thomas Heine, Christof Wöll, Stefan Bräse   +12 more
wiley   +1 more source

A highly absorptive ultra-wideband nanoscale metamaterial absorber for solar energy harvesting from ultraviolet to Infrared spectrum

Ain Shams Engineering Journal
This paper introduces a metamaterial absorber (MMA) with a unique design, exhibiting exceptional absorption capabilities across a wide range of wavelengths including ultraviolet, visible, and infrared.
Abdullah Al Mahfazur Rahman, Mohammad Tariqul Islam, Md. Moniruzzaman, Haitham Alsaif, Abdulwadoud A. Maash, Mohamed S. Soliman   +5 more
doaj   +1 more source