Results 31 to 40 of about 9,194 (219)

S-20 photocathode research activity. Part I [PDF]

, 1983
The goal of this activity has been to develop and implement S-20 photocathode processing techniques at Lawrence Livermore National Laboratory (LLNL) in order to study the physical properties of the photocathode films.
T. Huen, Gex, F., R. Kalibjian, Kalibjian, R., F. Gex, Huen, T.   +5 more
core   +1 more source

Efficient temporal shaping of electron distributions for high-brightness photoemission electron guns

Physical Review Special Topics. Accelerators and Beams, 2008
To achieve the lowest emittance electron bunches from photoemission electron guns, it is essential to limit the uncorrelated emittance growth due to space charge forces acting on the bunch in the vicinity of the photocathode through appropriate temporal ...
Ivan V. Bazarov, Dimitre G. Ouzounov, Bruce M. Dunham, Sergey A. Belomestnykh, Yulin Li, Xianghong Liu, Robert E. Meller, John Sikora, Charles K. Sinclair, Frank W. Wise, Tsukasa Miyajima   +10 more
doaj   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Simultaneous removal of methylene blue and Cr(VI) in a dual-chamber photocatalytic microbial fuel cell with WO3/MoS2/FTO photocathode

Heliyon
Carbon felt was used as the anode and WO3/MoS2/FTO (fluorine-doped tin oxide) was used as the photocathode in a photocatalytic microbial fuel cell (PMFC).
Jiye Xin, Shishi Kong, Xiaoliang Zhang, Yujuan Yang, Xuan Wang   +4 more
doaj   +1 more source

Temperature dependence of alkali-antimonide photocathodes: Evaluation at cryogenic temperatures

Physical Review Accelerators and Beams, 2017
Cs_{x}K_{y}Sb photocathodes were manufactured on a niobium substrate and evaluated over a range of temperatures from 300 to 77 K. Vacuum conditions were identified that minimize surface contamination due to gas adsorption when samples were cooled below ...
M. A. Mamun, M. R. Hernandez-Flores, E. Morales, C. Hernandez-Garcia, M. Poelker   +4 more
doaj   +1 more source

Biological photocathodes. [PDF]

Proceedings of the National Academy of Sciences, 1989
Biological surfaces emit electrons when subjected to UV light. This emission is increased greatly after exposure to cesium vapor. Increases from 2 to 3 orders of magnitude are observed, depending on the biochemicals present. Heme and chlorophyll exhibit unusually high photoemission currents, which are increased further after cesiation.
Griffith, O. H., Habliston, D. L., Birrell, G. B., Skoczylas, W. P., Hedberg, K. K.   +4 more
openaire   +2 more sources

Structural and Compositional Effects on the Scintillation Properties of Fast Emitting Metal‐Organic Frameworks

Advanced Science, EarlyView.
The crystalline structure, the atomic numbers of the constituent elementsand the size of MOF crystals each influence their photoluminescence and scintillation properties in distinct ways. Together, these factors provide valuable guidelines for designing systems with optimized performance and tunable timing characteristics, arising from the synergistic ...
Francesca Cova, Jacopo Perego, Biplab Joarder, Nobuhiro Yanai, Anna Vedda, Silvia Bracco, Angiolina Comotti, Angelo Monguzzi, Irene Villa   +8 more
wiley   +1 more source

Crystal Facet‐Controlled Efficient SnS Photocathodes for High Performance Bias‐Free Solar Water Splitting

Advanced Science, 2021
To achieve a high solar‐to‐hydrogen (STH) conversion efficiency, delicate strategies toward high photocurrent together with sufficient onset potential should be developed. Herein, an SnS semiconductor is reported as a high‐performance photocathode.
Hyungsoo Lee, Jin Wook Yang, Jeiwan Tan, Jaemin Park, Sang Gi Shim, Young Sun Park, Juwon Yun, Kyungmin Kim, Ho Won Jang, Jooho Moon   +9 more
doaj   +1 more source

Advancing Energy Materials by In Situ Atomic Scale Methods

Advanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
Progress in in situ atomic scale methods leads to an improved understanding of new and advanced energy materials, where a local understanding of complex, inhomogeneous systems or interfaces down to the atomic scale and quantum level is required. Topics from photovoltaics, dissipation losses, phase transitions, and chemical energy conversion are ...
Christian Jooss, Michael Seibt, Martin Wenderoth, Oliver Bünermann, Ole Bunjes, Till Domröse, Christian Eckel, Francesca Falorsi, Christoph Flathmann, Monica Kolek Martinez de Azagra, Matthias Krüger, Jonas Lindner, Tobias Meyer, Claus Ropers, Ulrich Ross, Kai Rossnagel, Sreeju Sreekantan Nair Lalithambika, Simone Techert, Georg A. Traeger, Cynthia Volkert, R. Thomas Weitz, Alec M. Wodtke   +21 more
wiley   +1 more source

Near-Infrared Absorption Enhancement of GaAs Photocathode Through “Sandwich” Micro-Nano Structure

Photonics
In this paper, a nano-layered transmission GaAs photocathode structure is proposed. The near-infrared absorption of the photocathode is enhanced by inserting a “sandwich” structure of nano-SiO2 layer + Si3N4 nanopillar array + nano-SiO2 layer between the
Ziyang Xiao, Miao Dong, Yonggang Huang, Jinhui Yang, Peng Jiao, Pan Shi, Yajie Du, Ying He, Jing Cheng, Yinsheng Xu   +9 more
doaj   +1 more source