Carbon nanotubes as electron source in an x-ray tube

By H. Sugie, M. Tanemura, V. Filip, K. Iwata, Kazunari Takahashi, F. Okuyama. 2001

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An Overview of the Recent Progress in the Synthesis and Applications of Carbon Nanotubes (2019, background): “Field Emission CNTs, due their high chemical stability, a sharp tip, better mechanical power, and good aspect ratio, are appropriate to be used as field emission electron sources [211] for flat panel displays [212,213], lamps [211], gas discharge tubes providing surge protection [214], and X-rays [2”
Carbon nanotubes: synthesis, properties and engineering applications (2019, background): “This near uniformity in electron energy provides higher resolution than thermionic electron sources [130].”
X-ray generation using carbon nanotubes (2015, methodology): “The first FE emitters using one-dimensional carbon allotropes were based on CNFs deposited on metallic tips [146,148,150,163].”
Field Emission from Carbon Nanostructures (2018, background): “Indeed, the above recalled properties [64,65] make CNTs excellent emitters, suitable for many applications such as high-resolution electron microscopes as well as electron beam lithography [66,67], X-ray tubes [68,69], and flat panel displays [70,71].”
Nanostructured and nanoscale devices, sensors and detectors (2005, background): “Carbon nanotubes (CNTs) have aspect ratios on the order of 1000, which coupled with high conductivity, makes them ideal candidates for low voltage field emitters, with applications in CNT based cold-cathode for X-ray generation [3].”