Results 101 to 110 of about 222,033 (262)

Apollo-Soyuz pamphlet no. 3: Sun, stars, in between [PDF]

, 1977
The structure of the sun and its surface temperature and brightness are discussed as background for explaining the ASTP joint experiment to photograph the solar corona from Soyuz while the Apollo spacecraft created an artificial eclipse by blocking out ...
From, T. P., Page, L. W.
core   +1 more source

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

Group velocity control in the ultraviolet domain via interacting dark-state resonances

, 2007
The propagation of a weak probe field in a laser-driven four-level atomic system is investigated. We choose mercury as our model system, where the probe transition is in the ultraviolet region. A high-resolution peak appears in the optical spectra due to
Bolda E L, Brillouin L, Chiao R Y, Ficek Z, Harris S E, Jörg Evers, Mahmoudi M, Mohammad Mahmoudi, Mostafa Sahrai, Nesmeyanov A N, Robert Fleischhaker, Scully M O, Sommerfeld A, Tajalli H, Wei X G   +14 more
core   +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

Two superluminous supernovae from the early universe discovered by the Supernova Legacy Survey

, 2013
We present spectra and lightcurves of SNLS 06D4eu and SNLS 07D2bv, two hydrogen-free superluminous supernovae discovered by the Supernova Legacy Survey. At z = 1.588, SNLS 06D4eu is the highest redshift superluminous SN with a spectrum, at M_U = -22.7 is
Astier, P., Balland, C., Carlberg, R. G., Conley, A., Fouchez, D., Guy, J., Hardin, D., Howell, D. A., Kasen, D., Lidman, C., Pain, R., Palanque-Delabrouille, N., Perrett, K., Pritchet, C. J., Regnault, N., Rich, J., Ruhlmann-Kleider, V., Sullivan, M.   +17 more
core   +3 more sources

Band Alignment in In‐Oxo Metal Porphyrin SURMOF Heterojunctions

Advanced Functional Materials, EarlyView.
Porphyrin core metalation in indium‑oxo SURMOFs enables systematic tuning of band edge positions without altering the crystal structure. First‑principles calculations reveal type‑I and type‑II heterostructures as well as multi‑junction energy cascades, establishing a modular strategy for exciton funneling and charge separation in optoelectronic ...
Puja Singhvi, Nina Vankova, Thomas Heine
wiley   +1 more source

Ab initio study of the structural, electronic, and optical properties of fluoro-double perovskites A2SbAgF6 (A = Li, K, Rb) for photovoltaic and optoelectronic applications

Next Materials
Perovskite materials are highly attractive for solar energy applications due to their semiconducting nature, wide light absorption range, and mechanical stability. This study presents the first comprehensive investigation of A2SbAgF6 (A = Li, K, and Rb),
Mohammed Abdellaoui, Rodouan Touti, Abdelghafour El Mekkaouy, El Houcine Akarchaou, Lamiae Talha, Abdellah Tahiri, Mohamed Filali, Samir Chtita   +7 more
doaj   +1 more source

Fluorescent radiation converter [PDF]

, 1981
A fluorescence radiation converter is described which includes a substantially undoped optically transparent substrate and a waveshifter coating deposited on at least one portion of the substrate for absorption of radiation and conversion of fluorescent ...
Viehmann, W.
core   +1 more source

Cool Kitchen: Processing Starch and Eggshell Powder into Sustainable Coatings for Passive Daytime Cooling

Advanced Functional Materials, EarlyView.
A food‐grade cooling composite made from starch and recycled eggshell powder offers a scalable, ultra‐low‐cost solution for passive daytime radiative cooling. Easily prepared using basic kitchen tools, this material empowers communities, even in areas with limited infrastructure, to stay cooler during worsening summer heat waves.
Qimeng Song, Evelyn Kubacki, Alexander Berger, Markus Retsch   +3 more
wiley   +1 more source

Development of broadband ultraviolet pulsed laser using Ce:LiCAF crystal to determine SO\(_2\) gas concentration by differential absorption spectroscopy

Communications in Physics
Earth’s atmosphere is a mixture of many gases which include pollutants such as SO2, NO2, NO, and O3 that have absorption  in the ultraviolet (UV) wavelength region.
Minh Hong Pham, Diep Van Nguyen, Duong Van Pham, Tu Xuan Nguyen, Hieu Minh Do, Kieu Anh Thi Doan, Tiep Viet Phung, Hong Dang Luu, Dang Van Le, Bich Thi Vu, Marilou Cadatal-Raduban, Trung Van Dinh   +11 more
doaj   +1 more source