Tuning field emission properties of tungsten trioxide nanowires for flat panel X-ray source application

2016 ◽  
Author(s):  
Paibin Xie ◽  
Daokun Chen ◽  
Guofu Zhang ◽  
Zhipeng Zhang ◽  
Fei Liu ◽  
...  
Keyword(s):  
Field Emission ◽  
Tungsten Trioxide ◽  
Flat Panel ◽  
X Ray ◽  
Emission Properties ◽  
Field Emission Properties

Emission Properties of Nanostructured Carbon Field-Emission Cathodes

2001 ◽  
Vol 685 ◽  
Author(s):  
A.G Chakhovskoi ◽  
N.N Chubun ◽  
C.E. Hunt ◽  
A.N Obraztsov ◽  
A.P. Volkov
Keyword(s):  
Field Emission ◽  
Low Voltage ◽  
Flat Panel Display ◽  
Nanostructured Carbon ◽  
Applied Current ◽  
Flat Panel ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emission Cathodes ◽  
Emission Cathode

AbstractPlanar field-emission cathode structures consisting of nanostructured carbon flakes have been investigated as an electron source for flat panel display application.Layers of nanoflakes were grown on silicon and molybdenum substrates using a high- temperature pyrolitic plasma-assisted CVD method. The result is a vertically oriented nanocluster layer of 1-2 micrometer height chemically bonded with the substrates. Additional orientation of the flakes, occurring during the first activation of the cathodes, was observed.Field emission properties of the emitters were studied in a vacuum chamber and in sealed flat-panel prototype devices with non-patterned low-voltage phosphor screens. Emitters with an area up to 1 square inch were tested under DC currents up to 100 microamps in diode mode. Anode bias up to 1.5 kV was applied. Current fluctuations of 1-2% were achieved using loading resistor.

Field emission properties of carbon nanotubes grown on a conical tungsten tip for the application of a microfocus x-ray tube

2007 ◽  
Vol 516 (2-4) ◽  
pp. 304-309 ◽  
Author(s):  
Chang-Kyun Park ◽  
Jong-Pil Kim ◽  
Sung-Jun Yun ◽  
Seoung-Hwan Lee ◽  
Jin-Seok Park
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
X Ray ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Tungsten Tip

scholarly journals Change in crystalline structure of W18O49 nanowires induced by X-ray irradiation and its effects on field emission

RSC Advances ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 752-760 ◽  
Author(s):  
Junqing Wu ◽  
Bo Wang ◽  
Futing Yi ◽  
Shaozhi Deng ◽  
Ningsheng Xu ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Field Emission ◽  
Crystalline Structure ◽  
Thermal Evaporation ◽  
X Ray ◽  
Emission Properties ◽  
Field Emission Properties

W18O49 nanowires were synthesized by thermal evaporation, and the effects of X-ray irradiation on their crystalline structure, chemical composition, and field emission properties were systematically investigated.

SYNTHESIS AND FIELD EMISSION PROPERTIES OF SnS2 AND In-DOPED SnS2 WITH HIERARCHICAL STRUCTURE

NANO ◽  
2011 ◽  
Vol 06 (05) ◽  
pp. 489-496 ◽  
Author(s):  
H. X. ZHONG ◽  
C. X. WANG
Keyword(s):  
Electron Microscopy ◽  
Field Emission ◽  
Photoelectron Spectroscopy ◽  
Sulfur Source ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
X Ray ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Transmission Electron

A simple hydrothermal route was employed to prepare flower-like SnS2 and In -doped SnS2 by using biomolecular L-cysteine as sulfur source. The synthetic samples were characterized by X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy in detail. Furthermore, the field emission from both the materials was investigated, it was found that both of them have excellent field emission properties, and the doped In has enhanced the field emission properties.

A study on the field emission properties of Bi2Se3 nanostructures prepared by laser ablation

2019 ◽  
Vol 33 (14n15) ◽  
pp. 1940050
Author(s):  
Yu Ohsumi ◽  
Pankaj Koinkar ◽  
Akihiro Furube ◽  
Keh Moh Lin ◽  
Subhash Kondawar ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Field Emission ◽  
Direct Method ◽  
High Vacuum ◽  
Target Material ◽  
Ultra High Vacuum ◽  
Emission Characteristics ◽  
X Ray ◽  
Emission Properties ◽  
Field Emission Properties

One of the effective methods known as pulse laser ablation in liquid (PLAL), in which a solid target material is immersed in an organic solvent and laser beam is irradiated through liquid on a target material, is a direct method used to generate nanoparticles in liquid medium. The present work is focused on the preparation of bismuth selenide (Bi2Se3) nanoparticles using PLAL to study their field emission characteristics. The PLAL was performed under nanosecond (ns) laser with different ablation time of 120 min and 240 min. The field emission characteristics were measured in the planer “diode” configuration in all metal ultra-high vacuum (UHV) chamber. The prepared Bi2Se3 nanoparticles were analyzed with different characterization techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-visible spectroscopy in order to study the surface morphology and structural information. The generation of Bi2Se3 nanoparticles is found after PLAL, which clearly suggests that bulk Bi2Se3 microsheet is transformed into Bi2Se3 nanoparticles. The X-ray spectra and UV spectra show the formation of nanoparticles upon laser ablation. The improvement in the field emission properties is found for laser-ablated Bi2Se3 nanoparticles. The field emission characteristics lead to increase in current density, which can be ascribed to the reduction in size of Bi2Se3 nanoparticles due to laser ablation. The prepared Bi2Se3 nanoparticles could be considered for novel applications in optoelectronics devices.

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