9.1.1.2.3 Applications of field electron emission

Kelwog, G. L.

doi:10.1007/10119615_53

Cited by 1 publication

(2 citation statements)

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“…25 Owing to its large NEA and outstanding thermal and structural stability, field emission electron sources from diamond is the subject of extensive recent research and they have been explored in various potential applications including electron guns, flat panel displays, ultrafast electron microscopy, etc. 26 Efficient and sustainable electron emission was observed in pristine nanostructured diamonds at a low electric field by Zhu et al 27 The electric field emission study of CVD diamond overcoats, dispersed onto metal substrate, is examined by scanning field emission microscopy. 28 Single-crystal diamond needles are prepared by Kleshch et al as a point electron source for electric field emission.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Numerous attempts have been undertaken by researchers to create the diamond with high aspect ratios, and large surface areas/porous architectures, including the production of nano- and microwires, cones, grasses, and diamond foam with pore sizes ranging from nano- to micrometers . Owing to its large NEA and outstanding thermal and structural stability, field emission electron sources from diamond is the subject of extensive recent research and they have been explored in various potential applications including electron guns, flat panel displays, ultrafast electron microscopy, etc . Efficient and sustainable electron emission was observed in pristine nanostructured diamonds at a low electric field by Zhu et al The electric field emission study of CVD diamond overcoats, dispersed onto metal substrate, is examined by scanning field emission microscopy .…”

Section: Introductionmentioning

confidence: 99%

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Tubular Diamond as an Efficient Electron Field Emitter

Karmakar

Sarkar

Mistari

et al. 2023

ACS Appl. Electron. Mater.

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Herein, we present a straightforward and cost-effective procedure for producing conductive diamond tubes on the surface of porous carbon nanotube hollow fibers using successive 10-pulsed laser annealing shots and 6 h of hot filament chemical vapor deposition techniques. Room-temperature Raman and X-ray diffraction spectra reveal the signature T2g peaks near 1332.4 cm–1 and 111 planes of diamonds near 43.9°, respectively. A low turn-on field (E TO) ∼1.85 V/μm@1 μA/cm2 and a threshold field (E TH) ∼2.54 V/μm@10 μA/cm2 were observed for the tubular diamond structures. The field enhancement factor (β) was calculated at 3594 and highly stable field emission current stability was observed over a long period of 4 h. For the first time, a good insight into the field emission results of the diamond is established with the structural, electronic properties, and the work function (φ) ∼4.84 eV analysis conducted by the density functional theory simulation. Finite electronic states at the Fermi level are observed beyond a band gap, and it demonstrates the wide-band gap (4.4 eV) semiconducting nature of the diamond. The Bader charge analysis and maximum entropy method pattern revealed the negative electron affinity of the diamond, and it is responsible for the emission of electrons from the conduction band of the diamond. Besides, the accumulation of charge carriers, which contributes to the electric field emission, takes place due to the weak π bonds of carbon atoms. The low turn-on field, the high field enhancement factor, and the good field emission current stability of tubular diamond offer great prospects for future efficient and low-cost field emission devices.

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