Results 31 to 40 of about 189,484 (267)

Recent Progress of Nanodiamond Film in Controllable Fabrication and Field Emission Properties

Nanomaterials, 2023
The interest in the field electron emission cathode nanomaterials is on the rise due to the wide applications, such as electron sources, miniature X-ray devices, display materials, etc.
Xin Guo, Yajun You, Aida Bao, Pinggang Jia, Jijun Xiong, Junshuai Li   +5 more
doaj   +1 more source

Subcycle surface electron emission driven by strong-field terahertz waveforms

Nature Communications, 2023
The advent of intense terahertz (THz) sources opened a new era when the demonstration of the acceleration and manipulation of free electrons by THz pulses became within reach.
Shaoxian Li, Ashutosh Sharma, Zsuzsanna Márton, Priyo S. Nugraha, Csaba Lombosi, Zoltán Ollmann, István Márton, Péter Dombi, János Hebling, József A. Fülöp   +9 more
doaj   +1 more source

Field - free and field - stimulated electron emission from solids [PDF]

Brazilian Journal of Physics, 1999
Electron irradiation of solids produces a backemission of secondary electrons (energies between 0 and 50 eV) and reflected primaries (energies between 50 eV and that of the incident beam). For insulators, it is shown that an externally applied positive electric field penetrating into the solid material, energizes electrons generated by the primary ...
Gross, Bernhard, Pintão, Carlos A. F., Hessel, Roberto   +2 more
openaire   +4 more sources

A high-brightness large-diameter graphene coated point cathode field emission electron source

Nature Communications, 2018
Traditional cold field emission electron sources rely on single crystal tungsten sharpened wires. Here, the authors use graphene-coated nickel point cathodes to devise alternative cold field emission electron sources for electron microscopy and ...
Xiuyuan Shao, Avinash Srinivasan, Wei Kean Ang, Anjam Khursheed   +3 more
doaj   +1 more source

Electron Holography by Field Emission Electron Microscope

Nihon Kessho Gakkaishi, 1980
A 100 kV field emission electron microscope has been developed which has lattice resolution of 0.62 A. Electron holography was put to practical use utilizing the high coherence of this electron beam. The coherence of the electron beam was demonstrated by photographing 3, 000 bi-prism interference fringes, which is an order of magnitude greater than the
TONOMURA, Akira, MATSUDA, Tsuyoshi, ENDO, Junji   +2 more
openaire   +2 more sources

Preparation and electron emission properties of carbon fiber composited graphite cathodes

Cailiao gongcheng, 2023
As the source of intense electron beam, the cathodes have an important effect on the performance of high power microwave source. Graphite is a common material for explosive emission cathodes of high power microwave source, which have the advantages of ...
FANG Dong, HUA Ye, WANG Zhen, GONG Jinyu, WAN Hong   +4 more
doaj   +1 more source

Enhanced Field Electron Emission from Photocurrent Treated Nanostructured Indium Oxide Films

MATEC Web of Conferences, 2018
Field electron emission currents from nanostructured films always have unsatisfied stability. This paper introduces a photocurrent treatment technique to enhance the filed emission properties, and gives a kind of nanostructured indium oxide film suitable
Li Zhenglin, Si Fuyuan, Wang Miaomiao, He Weigang, Zhang Yuwei   +4 more
doaj   +1 more source

Ultrafast Field‐Emission Electron Sources Based on Nanomaterials [PDF]

Advanced Materials, 2019
AbstractThe search for electron sources with simultaneous optimal spatial and temporal resolution has become an area of intense activity for a wide variety of applications in the emerging fields of lightwave electronics and attosecond science. Most recently, increasing efforts are focused on the investigation of ultrafast field‐emission phenomena of ...
Shenghan Zhou, Ke Chen, Matthew Thomas Cole, Zhenjun Li, Jun Chen, Chi Li, Qing Dai   +6 more
openaire   +2 more sources

Sudden anaerobization in Amphibacillus xylanus increases intracellular labile ferrous iron and inhibits cell growth

FEBS Open Bio, EarlyView.
Abruptly changing from aerobic to anaerobic conditions (sudden anaerobization) induced growth inhibition and a significant increase in intracellular labile ferrous iron in the aerotolerant anaerobe Amphibacillus xylanus. We found that free flavins mediate efficient electron transfer from NADH to ferric iron under anaerobic conditions, suggesting that ...
Shinya Kimata, Yoichi Sakai, Keisuke Tanaka, Etsuro Yoshimura, Ken Kitano, Morio Ishikawa, Tadahiro Nakamoto, Tsutomu Takayama, Hirofumi Inoue, Kaho Nomura, Tomonori Suzuki, Masataka Uchino, Akira Abe, Youichi Niimura   +13 more
wiley   +1 more source

Investigation of Influencing Factors on the Measurement Signal of a CMOS Image Sensor for Measuring Field Emission Currents

Sensors
We use optical CMOS image sensors for spatially and time-resolved measurement of the emission currents of field emission cathodes. The measured signal depends, on the one hand, on the emission current that flows from the cathode surface through the ...
Matthias Hausladen, Andreas Schels, Ali Asgharzade, Philipp Buchner, Mathias Bartl, Dominik Wohlfartsstätter, Simon Edler, Michael Bachmann, Rupert Schreiner   +8 more
doaj   +1 more source