A digital miniature x-ray tube with a high-density triode carbon nanotube field emitter

2013 ◽  
Vol 102 (2) ◽  
pp. 023504 ◽  
Author(s):  
Jin-Woo Jeong ◽  
Jun-Tae Kang ◽  
Sungyoul Choi ◽  
Jae-Woo Kim ◽  
Seungjoon Ahn ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Density ◽  
Field Emitter ◽  
X Ray

Fabrication and characterization of microwave cured high-density polyethylene/carbon nanotube and polypropylene/carbon nanotube composites

2019 ◽  
Vol 53 (15) ◽  
pp. 2091-2104 ◽  
Author(s):  
Gaurav Arora ◽  
Himanshu Pathak ◽  
Sunny Zafar
Keyword(s):  
Carbon Nanotube ◽  
High Density Polyethylene ◽  
High Density ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Scanning Electron

Carbon nanotubes have been used as reinforcements in polymers due to their high elasticity, flexibility, and thermal conductivity. In this study, pellets of high-density polyethylene +20 wt% carbon nanotube and polypropylene +20 wt% carbon nanotube were cured using microwave energy. X-ray diffraction, differential scanning calorimetry, thermogravimetric analysis, uniaxial tensile test, and scanning electron microscopy was used to study morphology, thermal stability, and mechanical performance of the microwave-cured composites. X-ray diffraction analysis confirmed the bonding between the polymer and carbon nanotube as the peaks shifted and intensified. From the thermal study, it was observed that melting point of the composites is affected by microwave curing and the crystallinity of high-density polyethylene/carbon nanotube and polypropylene/carbon nanotube changed by 57.67% and 47.28%, respectively. Results of the uniaxial tensile test indicated that Young’s modulus of microwave cured high-density polyethylene/carbon nanotube and polypropylene/carbon nanotube composites were improved by 295% and 787.8%, respectively. Scanning electron microscopic fractography shows the stretching of polymer over-lapped on carbon nanotubes in the direction of the applied load.

scholarly journals Characterization of X-ray charge neutralizer using carbon-nanotube field emitter

2016 ◽  
Vol 55 (6S1) ◽  
pp. 06GF10 ◽  
Author(s):  
Shuhei Okawaki ◽  
Satoshi Abo ◽  
Fujio Wakaya ◽  
Hayato Yamashita ◽  
Masayuki Abe ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emitter ◽  
X Ray

Design of a carbon-nanotube yarn field emitter for micro-focus X-ray generation

2016 ◽  
Vol 69 (3) ◽  
pp. 297-303
Author(s):  
Hyun Suk Kim ◽  
Edward Joseph D. Castro ◽  
Choong Hun Lee
Keyword(s):  
Carbon Nanotube ◽  
Field Emitter ◽  
X Ray

High-density large-scale field emitter arrays for X-ray free electron laser cathodes

2013 ◽  
Vol 111 ◽  
pp. 114-117 ◽  
Author(s):  
Vitaliy A. Guzenko ◽  
Anna Mustonen ◽  
Patrick Helfenstein ◽  
Eugenie Kirk ◽  
Soichiro Tsujino
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Large Scale ◽  
High Density ◽  
Field Emitter ◽  
X Ray ◽  
Field Emitter Arrays ◽  
Scale Field ◽  
Large Scale Field

X-ray tube based on carbon nanotube field emitter for low dose mini C-arm fluoroscopy

2021 ◽  
Author(s):  
Jongmin Lim ◽  
Amar Prasad Gupta ◽  
Hangyeol Park ◽  
Jinho Choi ◽  
Jaeik Jung ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Low Dose ◽  
Field Emitter ◽  
X Ray

X-ray source using carbon-nanotube field emitter with side-gate electrode

2015 ◽  
Vol 54 (6S1) ◽  
pp. 06FF10 ◽  
Author(s):  
Shuhei Okawaki ◽  
Satoshi Abo ◽  
Fujio Wakaya ◽  
Masayuki Abe ◽  
Mikio Takai
Keyword(s):  
Carbon Nanotube ◽  
Gate Electrode ◽  
Field Emitter ◽  
X Ray

Composition and Surface Topography Effects on Apatite-Forming Ability of Ceramic-Polymer Composites

2003 ◽  
Vol 774 ◽  
Author(s):  
Susan M. Rea ◽  
Serena M. Best ◽  
William Bonfield
Keyword(s):  
Surface Topography ◽  
High Density Polyethylene ◽  
High Density ◽  
Apatite Layer ◽  
Biologically Active ◽  
Human Blood Plasma ◽  
Apatite Formation ◽  
Polyethylene Matrix ◽  
Composite Surface ◽  
X Ray

AbstractHAPEXTM (40 vol% hydroxyapatite in a high-density polyethylene matrix) and AWPEX (40 vol% apatite-wollastonite glass ceramic in a high density polyethylene matrix) are composites designed to provide bioactivity and to match the mechanical properties of human cortical bone. HAPEXTM has had clinical success in middle ear and orbital implants, and there is great potential for further orthopaedic applications of these materials. However, more detailed in vitro investigations must be performed to better understand the biological interactions of the composites and so the bioactivity of each material was assessed in this study. Specifically, the effects of controlled surface topography and ceramic filler composition on apatite layer formation in acellular simulated body fluid (SBF) with ion concentration similar to those of human blood plasma were examined. Samples were prepared as 1 cm × 1 cm × 1 mm tiles with polished, roughened, or parallel-grooved surface finishes, and were incubated in 20 ml of SBF at 36.5 °C for 1, 3, 7, or 14 days. The formation of a biologically active apatite layer on the composite surface after immersion was demonstrated by thin-film x-ray diffraction (TF-XRD), environmental scanning electron microscopy (ESEM) imaging and energy dispersive x-ray (EDX) analysis. Variations in sample weight and solution pH over the period of incubation were also recorded. Significant differences were found between the two materials tested, with greater bioactivity in AWPEX than HAPEXTM overall. Results also indicate that within each material the surface topography is highly important, with rougher samples correlated to earlier apatite formation.

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