Results 41 to 50 of about 71,771 (337)

Electric and Photoelectric Gates for ion backflow suppression in multi-GEM structures [PDF]

, 2006
A new approach to suppress ion backflow in multi-GEM structures is suggested. In this approach, the potential difference applied across the gap between two adjacent GEMs is reversed compared to the standard configuration.
Bondar, A., Buzulutskov, A.
core   +1 more source

Construção e caracterização de uma célula fotoelétrica para fins didáticos

Revista Brasileira de Ensino de Física
Este artigo apresenta o desenvolvimento e a caracterização de uma célula de efeito fotoelétrico e um sistema de excitação e de medição adequados para uso didático em aulas de Física.
João Bernardes da Rocha Filho, Marcos Alfredo Salami, Vicente Hillebrand   +2 more
doaj   +1 more source

γ-ray shielding and mechanical properties of NR/Bi2WO6 composites enhanced by interlayer bonds

He jishu
BackgroundRubber-based nanocomposites have become a research focus in the nuclear industry due to their wide application in wearable radiation protection devices.PurposeThis study aims to explore the γ-ray shielding mechanism of composite material of ...
LI Yintao, LIU Dongliang, ZHOU Yuanlin, ZHANG Quanping   +3 more
doaj   +1 more source

Femtosecond single-electron pulses generated by two-photon photoemission close to the work function

New Journal of Physics, 2015
Diffraction and microscopy with ultrashort electron pulses can reveal atomic-scale motion during matter transformations. However, the spatiotemporal resolution is significantly limited by the achievable quality of the electron source.
L Kasmi, D Kreier, M Bradler, E Riedle, P Baum   +4 more
doaj   +1 more source

Photoelectric Effect at Ultrahigh Intensities [PDF]

Physical Review Letters, 2007
In the spectral range of the extreme ultraviolet at a wavelength of 13.3 nm, we have studied the photoionization of xenon at ultrahigh intensities. For our ion mass-to-charge spectroscopy experiments, irradiance levels from 10(12) to 10(16) W cm(-2) were achieved at the new free-electron laser in Hamburg FLASH by strong beam focusing with the aid of a ...
Sorokin, A. A., Bobashev, S. V., Feigl, T., Tiedtke, K., Wabnitz, H., Richter, M.   +5 more
openaire   +4 more sources

Advanced Micro‐OLED Integration on Thin and Flexible Polymer Neural Probes for Targeted Optogenetic Stimulation

Advanced Functional Materials, EarlyView.
This paper introduces a flexible neural probe with integrated micro‐OLEDs on a flexible substrate for the first time, featuring 8 micro‐OLEDs and recording electrodes for optogenetics. It uses advanced encapsulation and an IAI anode for durability, emitting 470 nm light for ChR2 activation, enabling high‐resolution, minimally invasive stimulation ...
Somin Lee, Mi Kyung Kim, Seonil Kwon, Jia Chee Leong, Byeongju Noh, Junhee Sim, Eun Gyo Jeong, Hyunjoo J. Lee, Kyung Cheol Choi   +8 more
wiley   +1 more source

Photoelectric energy spectrometer Patent [PDF]

, 1969
Spectrometer using photoelectric effect to obtain spectral ...
Becker, R. A.
core   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Intramolecular Down‐ and Up‐Conversion in Dimeric Tetracene Complexes Centered via Platinum(II) and Palladium(II)

Advanced Functional Materials, EarlyView.
Metal‐tetracene dimeric complexes are synthesized through the pyridyl coordination to either Pt(II) or Pd(II). Photophysical properties are systematically compared as a function of the metal using steady‐state and time‐resolved spectroscopy. The Pt(II) dimer exhibits efficient intramolecular singlet fission and subsequent intramolecular up‐conversion ...
Yifan Bo, Yuxuan Hou, Melchor Matabuena, Rik R. Tykwinski, Dirk M. Guldi   +4 more
wiley   +1 more source

Impact of the photoelectric threshold sensitivity on the work function determination—Revealing ultra-low work functions of caesiated surfaces

AIP Advances, 2022
The exploitation of the photoelectric effect is a prominent method for the in situ measurement of the absolute work function of a surface. In the case of metallic surfaces, the Fowler theory is routinely applied for fitting or extrapolating the measured ...
A. Heiler, R. Friedl, U. Fantz
doaj   +1 more source